One Way
Fare Type:
  • Regular
  • Armed ForcesNEW
    Armed Forces Fare

    Applicable for serving and retired personnel of Armed Forces and Paramilitary Forces, their recognised dependants like spouses and children, and war widows. It is mandatory to show a valid ID or dependant card at the airport, without which boarding might be denied.

  • Student
    Student Fare

    Only students above 12 years of age are eligible for special fares and/or additional baggage allowances. Carrying valid student ID cards and student visas (where applicable) is mandatory, else the passenger may be denied boarding or asked to pay for extra baggage.

  • Senior Citizen
    Senior Citizen Fare

    Only senior citizens above the age of 60 years can avail this special fare. It is mandatory to produce proof of Date of Birth at the airport, without which prevailing fares will be charged.

  • Double Seat
    Fly Safer with Double Seat

    Step up physical distancing by booking two or three adjacent seats for one traveller. Opt from ‘Double/ Entire Row’ by Indigo or ‘GoMore’ service by GoAir - available only for domestic one-way economy class bookings.

Popular Filters

Departure Airports

Arrival Airports

One Way Price

₹ 6,386 ₹ 75,000

Duration

50 m 16 h 0 m

Stops From Manchester

Departure From Manchester

6 AM to 12 PM

₹ 6,386

12 PM to 6 PM

₹ 9,434

After
6 PM

₹ 10,305

Arrival at Belfast

6 AM to 12 PM

₹ 6,386

12 PM to 6 PM

₹ 9,434

After
6 PM

₹ 10,305

Alliances & Airlines

Oneworld

(17)

SkyTeam

()

Star Alliance

()

Layover Airports

Layover Duration

1 h 25 m 14 h 0 m

Manchester to Belfast Malmo Aviation

Lowest fare from Manchester to Belfast on 04 Aug - ₹6386


Cheap International Manchester to Belfast Malmo Aviation air tickets at MakeMyTrip India. Best Deals at Lowest fares guaranteed on flights from Manchester to Belfast by Malmo Aviation International Travel. Check Malmo Aviation booking, International Flight number, Flight status, Schedules online from Manchester to Belfast.Also book Belfast to Manchester Malmo Aviation flights tickets online.Avail Zero Cancellation for flight bookings.
Sorted By:
Departure
Duration
Arrival
Price
easyJet

₹ 6,386

Manchester to Belfast , 4 Aug

easyJet U2 | 701

07:10

Mon, 4 Aug 25

Terminal T1 – Departures B

Manchester, United Kingdom

01 h

08:10

Mon, 4 Aug 25

Belfast, United Kingdom

BAGGAGE : CHECK INCABIN

Information not available

FARES
Cabin bagCheck-inCancellationDate ChangeSeatMeal

Standard

Fare offered by airline.

Chargeable
0 Kg
Non-refundable fare
Not allowed
Chargeable
No Meals

₹ 6,386

Inclusive

Fare offered by airline.

Chargeable
23 Kgs
Non-refundable fare
Not allowed
Free seats available
No Meals

₹ 13,061

Inclusive Plus

Fare offered by airline.

15 Kgs
23 Kgs
Non-refundable fare
Not allowed
Free seats available
Get complimentary meals

₹ 20,970

easyJet

₹ 6,531

Manchester to Belfast , 4 Aug

easyJet U2 | 90

08:45

Mon, 4 Aug 25

Terminal T1 – Departures B

Manchester, United Kingdom

01 h

09:45

Mon, 4 Aug 25

Belfast, United Kingdom

BAGGAGE : CHECK INCABIN

Information not available

FARES
Cabin bagCheck-inCancellationDate ChangeSeatMeal

Standard

Fare offered by airline.

Chargeable
0 Kg
Non-refundable fare
Not allowed
Chargeable
No Meals

₹ 6,531

Inclusive

Fare offered by airline.

Chargeable
23 Kgs
Non-refundable fare
Not allowed
Free seats available
No Meals

₹ 13,206

Inclusive Plus

Fare offered by airline.

15 Kgs
23 Kgs
Non-refundable fare
Not allowed
Free seats available
Get complimentary meals

₹ 20,970

easyJet

₹ 7,111

Manchester to Belfast , 4 Aug

easyJet U2 | 709

11:00

Mon, 4 Aug 25

Terminal T1 – Departures B

Manchester, United Kingdom

55 m

11:55

Mon, 4 Aug 25

Belfast, United Kingdom

BAGGAGE : CHECK INCABIN

Information not available

FARES
Cabin bagCheck-inCancellationDate ChangeSeatMeal

Standard

Fare offered by airline.

Chargeable
0 Kg
Non-refundable fare
Not allowed
Chargeable
No Meals

₹ 7,111

Inclusive

Fare offered by airline.

Chargeable
23 Kgs
Non-refundable fare
Not allowed
Free seats available
No Meals

₹ 13,786

Inclusive Plus

Fare offered by airline.

15 Kgs
23 Kgs
Non-refundable fare
Not allowed
Free seats available
Get complimentary meals

₹ 20,970

easyJet

₹ 8,418

Liverpool to Belfast , 4 Aug

easyJet U2 | 531

07:20

Mon, 4 Aug 25

Liverpool, United Kingdom

50 m

08:10

Mon, 4 Aug 25

Terminal Terminal 1

Belfast, United Kingdom

BAGGAGE : CHECK INCABIN

Information not available

FARES
Cabin bagCheck-inCancellationDate ChangeSeatMeal

Standard

Fare offered by airline.

Chargeable
0 Kg
Non-refundable fare
Not allowed
Chargeable
No Meals

₹ 8,418

Inclusive

Fare offered by airline.

Chargeable
23 Kgs
Non-refundable fare
Not allowed
Free seats available
No Meals

₹ 15,093

Inclusive Plus

Fare offered by airline.

15 Kgs
23 Kgs
Non-refundable fare
Not allowed
Free seats available
Get complimentary meals

₹ 16,601

easyJet

₹ 9,403

Manchester to Belfast , 4 Aug

easyJet U2 | 721

07:40

Mon, 4 Aug 25

Terminal T1 – Departures B

Manchester, United Kingdom

55 m

08:35

Mon, 4 Aug 25

Terminal Terminal 1

Belfast, United Kingdom

BAGGAGE : CHECK INCABIN

Information not available

FARES
Cabin bagCheck-inCancellationDate ChangeSeatMeal

Standard

Fare offered by airline.

Chargeable
0 Kg
Non-refundable fare
Not allowed
Chargeable
No Meals

₹ 9,403

Inclusive

Fare offered by airline.

Chargeable
23 Kgs
Non-refundable fare
Not allowed
Free seats available
No Meals

₹ 16,379

Inclusive Plus

Fare offered by airline.

15 Kgs
23 Kgs
Non-refundable fare
Not allowed
Free seats available
Get complimentary meals

₹ 17,738

easyJet

₹ 9,434

Manchester to Belfast , 4 Aug

easyJet U2 | 705

13:10

Mon, 4 Aug 25

Terminal T1 – Departures B

Manchester, United Kingdom

55 m

14:05

Mon, 4 Aug 25

Belfast, United Kingdom

BAGGAGE : CHECK INCABIN

Information not available

FARES
Cabin bagCheck-inCancellationDate ChangeSeatMeal

Standard

Fare offered by airline.

Chargeable
0 Kg
Non-refundable fare
Not allowed
Chargeable
No Meals

₹ 9,434

Inclusive

Fare offered by airline.

Chargeable
23 Kgs
Non-refundable fare
Not allowed
Free seats available
No Meals

₹ 16,109

Inclusive Plus

Fare offered by airline.

15 Kgs
23 Kgs
Non-refundable fare
Not allowed
Free seats available
Get complimentary meals

₹ 20,970

easyJet

₹ 10,305

Manchester to Belfast , 4 Aug

easyJet U2 | 707

20:55

Mon, 4 Aug 25

Terminal T1 – Departures B

Manchester, United Kingdom

55 m

21:50

Mon, 4 Aug 25

Belfast, United Kingdom

BAGGAGE : CHECK INCABIN

Information not available

FARES
Cabin bagCheck-inCancellationDate ChangeSeatMeal

Standard

Fare offered by airline.

Chargeable
0 Kg
Non-refundable fare
Not allowed
Chargeable
No Meals

₹ 10,305

Inclusive

Fare offered by airline.

Chargeable
23 Kgs
Non-refundable fare
Not allowed
Free seats available
No Meals

₹ 16,980

Inclusive Plus

Fare offered by airline.

15 Kgs
23 Kgs
Non-refundable fare
Not allowed
Free seats available
Get complimentary meals

₹ 20,970

British Airways

₹ 21,414

Leeds to Belfast , 4 Aug

British Airways BA | 8987

19:45

Mon, 4 Aug 25

Leeds, United Kingdom

01 h 10 m

20:55

Mon, 4 Aug 25

Belfast, United Kingdom

BAGGAGE : CHECK INCABIN

Information not available

FARES
Cabin bagCheck-inCancellationDate ChangeMeal

Plus

Fare offered by airline.

7 Kgs
1 Piece
Non-refundable fare
Date Change Fee starting
₹ 6,935
Get complimentary meals

₹ 21,414

Economy Standard

Fare offered by airline.

7 Kgs
1 Piece
Non-refundable fare
Date Change Fee starting
₹ 6,935
Get complimentary meals

₹ 48,224

British Airways

₹ 26,909

Manchester to Belfast , 4 Aug

British Airways BA | 1407

19:45

Mon, 4 Aug 25

Terminal T3

Manchester, United Kingdom

01 h

20:45

Mon, 4 Aug 25

Terminal T5

London - Heathrow Apt, United Kingdom

BAGGAGE : CHECK INCABIN

Information not available

British Airways BA | 1414

07:30

Tue, 5 Aug 25

Terminal T5

London - Heathrow Apt, United Kingdom

01 h 20 m

08:50

Tue, 5 Aug 25

Belfast, United Kingdom

BAGGAGE : CHECK INCABIN

Information not available

FARES
Cabin bagCheck-inCancellationDate ChangeMeal

Basic

Fare offered by airline.

7 Kgs
0 Kg
Non-refundable fare
Date Change Fee starting
₹ 6,935
Get complimentary meals

₹ 26,909

Plus

Fare offered by airline.

7 Kgs
1 Piece
Non-refundable fare
Date Change Fee starting
₹ 6,935
Get complimentary meals

₹ 30,379

Plus select

Fare offered by airline.

7 Kgs
1 Piece
Cancellation Fee starting
₹ 5,780
Free date change allowed
Get complimentary meals

₹ 40,319

Economy Standard

Fare offered by airline.

7 Kgs
1 Piece
No airline cancellation fee
Free date change allowed
Get complimentary meals

₹ 89,894

Loganair Limited, British Airways

₹ 35,879

Liverpool to Belfast , 4 Aug

Loganair Limited LM | 682

08:35

Mon, 4 Aug 25

Liverpool, United Kingdom

40 m

09:15

Mon, 4 Aug 25

Isle Of Man, United Kingdom

BAGGAGE : CHECK INCABIN

Information not available

Loganair Limited LM | 637

12:35

Mon, 4 Aug 25

Isle Of Man, United Kingdom

01 h

13:35

Mon, 4 Aug 25

Birmingham, United Kingdom

BAGGAGE : CHECK INCABIN

Information not available

British Airways BA | 8897

19:40

Mon, 4 Aug 25

Birmingham, United Kingdom

01 h 15 m

20:55

Mon, 4 Aug 25

Belfast, United Kingdom

BAGGAGE : CHECK INCABIN

Information not available

FARES
Cabin bagCheck-inCancellationDate Change

Fly|plus

Fare offered by airlines.

7 Kgs
20 Kgs
Non-refundable fare
Date Change Fee starting
₹ 6,935

₹ 35,879

About Manchester (MAN)

Located at the heart of Great Manchester, in the north west of England, Manchester is a home to over 2.6 inhabitants. The city is popular for its influence on the histories of industry and music and on top , for its port connection. It is seen as the 'capital of the north of England. The city is becoming more and more popular because of the young vibrant vibe of its surroundings. The Manchester is also named as the 'best student city' by many, reason being the two largest universities in the UK, the University if Manchester and the Manchester Metropolitan University. One more reason for its constant popularity is the world famous football craze in Manchester. With world class football clubs, Manchester United and Manchester City, the city has gained enormous likeability from all across the globe. Tourists often visit the city because of its diverse cultural and religious ambiance and its gay-friendly, liberal minded spirit. With temperate maritime climatic conditions, the place attracts lot more tourist visits. You can visit the place through plane and can easily land down at the Manchester Airport. There are different parking facilities available outside the airport, to ensure proper settlement of your vehicles. The tourists can also opt for the various train routes and can also reach the place through car, bike and bus. Its always advisable to carry a city map along with you for the proper directions. Out of all the important things to be watched in the city, there are few to be set at your priority list and they are: the areas of the Cosmopolitan Manchester, Historical Manchester and cultural Manchester. With all the historic monuments, libraries, cultural joints and sporting hubs, the city fulfils everyone's dream to explore a stupendous place with super setting. Dining at Manchester is always a treat and one can try on different cuisines, to satisfy their taste-buds. Planning a trip to this vibrant place can become a lot more easier with MakeMyTrip beneficial offers and deals. At the website, you can easily book your online tickets for plane, train and buses. Proper accommodation facilities can be finalised with just few minutes invested. The site also offers profitable deals and detailed information on your desired location.

FAQs - Manchester to Belfast Malmo Aviation Flight

What is the baggage allowance on Malmo Aviation flights from Manchester to Belfast?

A:
  • Economy class generally includes 20 kg check-in baggage.
  • Hand baggage allowance is up to 7 kg.
  • Additional baggage can be pre-booked online at discounted rates.
  • Excess baggage at airport check-in may incur higher fees.

Are meals included on Malmo Aviation flights from Manchester to Belfast?

A:
  • Malmo Aviation is a low-cost carrier; meals are not included by default.
  • You can pre-book meals during ticket purchase.
  • Limited snacks and drinks are available onboard for purchase.
  • Meal options vary based on route and time of flight.

How long is the direct flight from Manchester to Belfast on Malmo Aviation?

A:
  • Flight duration is typically around 3 hours 45 minutes.
  • May vary slightly depending on weather and air traffic.
  • It is a non-stop international route.
  • Check exact timings during booking for the selected date.

What is the check-in baggage policy for Malmo Aviation on international routes?

A:
  • Standard check-in baggage is 20 kg in economy.
  • Baggage over this limit will attract excess charges.
  • Infants are allowed an additional 10 kg check-in baggage.
  • Prepaid baggage slabs offer cost savings over airport rates.

Can I select my seat on Malmo Aviation flights from Manchester to Belfast?

A:
  • Yes, seat selection is available for a fee.
  • You can choose window, aisle, or extra-legroom seats.
  • Free seat selection may be allowed during web check-in (limited).
  • Seat selection can be done during booking or later via Manage Booking.

Are in-flight entertainment options available on Malmo Aviation?

A:
  • No, traditional seat-back entertainment is not provided.
  • Passengers are advised to carry their own devices and content.
  • Some flights may offer in-flight magazines.
  • Power outlets or USB ports are usually not available.

What is the hand baggage weight limit on Malmo Aviation for this route?

A:
  • One cabin bag up to 7 kg is allowed.
  • Dimensions should not exceed 115 cm (L+W+H).
  • One small personal item (handbag/laptop) may be allowed.
  • Excess cabin baggage may be checked in at additional cost.

Is web check-in available for Malmo Aviation from Manchester to Belfast?

A:
  • Yes, web check-in opens 48 hours before departure.
  • Available up to 2 hours before scheduled takeoff.
  • Boarding pass can be downloaded online or received via email.
  • Seat selection during web check-in may be free or paid.

Does Malmo Aviation offer priority boarding or special services for families?

A:
  • Priority boarding is offered at extra cost or to special categories.
  • Families with infants, elderly, or disabled get assistance.
  • No business class or loyalty privileges (as it’s a low-cost carrier).
  • Special service requests can be made during booking.

What is the average fare for a Manchester to Belfast flight on Malmo Aviation?

A:
  • Average fares range from ₹9,000 to ₹15,000 one-way.
  • Prices vary based on seasonality and booking window.
  • Booking early usually helps get lower fares.
  • Additional costs for meals, baggage, or seat selection may apply.

Are there any additional charges apart from the base fare?

A:
  • Yes, charges apply for baggage beyond allowance.
  • Meals, seat selection, and travel insurance are chargeable.
  • Airport taxes and surcharges are usually included in the final fare.
  • Payment gateway or convenience fees may apply.

How can I find the lowest fare for Manchester to Belfast on MakeMyTrip?

A:
  • Use the “cheapest date” or “fare calendar” feature.
  • Book tickets 30–45 days in advance.
  • Subscribe to fare alerts.
  • Compare prices across different times of day and days of week.

Can I cancel or reschedule my Malmo Aviation ticket on MakeMyTrip?

A:
  • Yes, cancellation and rescheduling is allowed via Manage Booking.
  • Charges apply based on fare rules and time left before departure.
  • Refunds (if applicable) are processed by MakeMyTrip.
  • Always review the fare policy during booking.

Will I get a refund if I cancel my Malmo Aviation ticket to Belfast?

A:
  • Refunds depend on the fare type and cancellation time.
  • Basic fares may have low or no refund value.
  • Taxes and government fees may be refunded.
  • Refund is processed to the original payment method.

What payment options are available for booking Malmo Aviation flights?

A:
  • Credit/debit cards, UPI, and internet banking are accepted.
  • EMI options may be available for higher fare totals.
  • MakeMyTrip wallet and gift cards can be used.
  • International cards may be accepted with 3D Secure.

How early should I arrive at Manchester airport for an international Malmo Aviation flight?

A:
  • Arrive at least 3 hours before departure.
  • Counters close 60 minutes prior to takeoff.
  • Web check-in doesn’t exempt you from baggage drop/security.
  • Longer queues are expected during peak travel seasons.

How frequently does Malmo Aviation fly from Manchester to Belfast?

A:
  • Typically operates daily or multiple times a week.
  • Frequency may vary by season or airline schedule.
  • Check real-time schedules on MakeMyTrip or airline website.
  • Increased frequency during holidays or festive periods.

Are there seasonal discounts or offers on this route?

A:
  • Yes, promotions are often run around festivals or holidays.
  • Look out for flash sales and credit card partner discounts.
  • Off-peak seasons (e.g., summer) may offer cheaper fares.
  • Use promo codes during booking to save extra.

Can I book Malmo Aviation group travel from Manchester to Belfast?

A:
  • Yes, group bookings are available for 10 or more passengers.
  • Discounts and flexible payment terms may be offered.
  • Booking needs to be done through customer support or agency partners.
  • Name changes and other terms are specific to group travel policies.

What if my baggage is lost or delayed on Malmo Aviation?

A:
  • Report immediately to the airline desk at the airport.
  • You will be given a Property Irregularity Report (PIR).
  • Compensation may be available after investigation.
  • Airline customer service can be contacted for status updates.

Does Malmo Aviation offer travel insurance while booking?

A:
  • Yes, travel insurance can be added during booking.
  • Covers trip delays, baggage loss, medical emergencies, etc.
  • Provided by third-party insurers linked with the airline or OTA.
  • Check policy terms before purchasing.

Are pets allowed on Malmo Aviation flights?

A:
  • Only guide dogs are allowed in the cabin.
  • Pets may be transported as cargo under specific conditions.
  • Advance approval and documentation is mandatory.
  • Contact airline customer care for exact pet travel guidelines.

How can I get GST invoice for my Malmo Aviation booking?

A:
  • If booked via MakeMyTrip, you can download invoice from the account.
  • Ensure GST number is entered at time of booking.
  • Airline may also provide GST invoice on request.
  • Useful for business travel expense claims.

Is there Wi-Fi available onboard Malmo Aviation flights?

A:
  • No, Wi-Fi is not available on Malmo Aviation.
  • Passengers are advised to download content beforehand.
  • Use offline entertainment during flight.
  • Email or work-related tasks cannot be performed online.

What happens if I miss my Malmo Aviation flight?

A:
  • No-show policy applies; full ticket fare may be forfeited.
  • You may contact the airline for rebooking (at extra cost).
  • Refunds not applicable in most no-show cases.
  • Travel insurance may cover missed connections.

Can I upgrade my seat on Malmo Aviation flights?

A:
  • Upgrades to extra-legroom seats are available for a fee.
  • No business class cabin available.
  • Upgrades can be done during web check-in or at airport counter.
  • Subject to availability.

Is there a mobile app for Malmo Aviation?

A:
  • Yes, Malmo Aviation has an official mobile app.
  • Available for Android and iOS platforms.
  • Lets you book, check-in, manage bookings, and track flights.
  • Push notifications for delays and offers are supported.

Does Malmo Aviation allow changes in passenger name?

A:
  • Minor corrections may be allowed (e.g., spelling).
  • Full name changes are not permitted.
  • Contact airline support immediately for name issues.
  • Always review details before confirming booking.
Manchester Address
Located at the heart of Great Manchester, in the north west of England, Manchester is a home to over 2.6 inhabitants. The city is popular for its influence on the histories of industry and music and on top , for its port connection. It is seen as the 'capital of the north of England. The city is becoming more and more popular because of the young vibrant vibe of its surroundings. The Manchester is also named as the 'best student city' by many, reason being the two largest universities in the UK, the University if Manchester and the Manchester Metropolitan University. One more reason for its constant popularity is the world famous football craze in Manchester. With world class football clubs, Manchester United and Manchester City, the city has gained enormous likeability from all across the globe. Tourists often visit the city because of its diverse cultural and religious ambiance and its gay-friendly, liberal minded spirit. With temperate maritime climatic conditions, the place attracts lot more tourist visits. You can visit the place through plane and can easily land down at the Manchester Airport. There are different parking facilities available outside the airport, to ensure proper settlement of your vehicles. The tourists can also opt for the various train routes and can also reach the place through car, bike and bus. Its always advisable to carry a city map along with you for the proper directions. Out of all the important things to be watched in the city, there are few to be set at your priority list and they are: the areas of the Cosmopolitan Manchester, Historical Manchester and cultural Manchester. With all the historic monuments, libraries, cultural joints and sporting hubs, the city fulfils everyone's dream to explore a stupendous place with super setting. Dining at Manchester is always a treat and one can try on different cuisines, to satisfy their taste-buds. Planning a trip to this vibrant place can become a lot more easier with MakeMyTrip beneficial offers and deals. At the website, you can easily book your online tickets for plane, train and buses. Proper accommodation facilities can be finalised with just few minutes invested. The site also offers profitable deals and detailed information on your desired location.

About Belfast (BFS)

Belfast is the capital and also the largest city of Northern Island. Although most of the area of Belfast lies in County Antrim, but its eastern and southern parts lie in County Down. Located in the mouth of River Lagan on Belfast Lough, the place has an enchanting periphery of low strung hills, and a verdant plain. Belfast has mainly two airports, George Best Belfast City Airport (just 2 miles from Belfast's city centre) and Belfast International Airport (situated close to towns of Templepatrick and Antrim). Apart from an unhindered air connection, the place has good and smooth road network (buses and cars) and train connection. Belfast is the heart of music, here you could catch up with the beats of traditional, classical, country, jazz, blues and rock music. Apart from these genres, what attracts the tourists most is the people's music which can make anyone tap and swing around with that of the groovy rhythm. Belfast Community Gospel Choir, Belfast Festival at Queen's, Belfast Nashville Songwriters Festival, Belfast Print Workshop, Black Box, Bradbury Art Gallery and Camerata Ireland few of the places and occasions where dance & music come to life. Belfast is also the treasure trove of the history. Albert Clock, Alexandra Graving Dock, The Belfast Barge, Belfast Castle Estate, The Big Fish, Hillsborough Castle & Gardens, The Paint Hall (Titanic Studios) and many more are illustrious sights that give you huge insights into the culture and history of the land. Comprising many pleasant sights, Belfast is full of nature's grace and beauty. The land is full of green and flourishing parks and gardens like The Argory, Belfast Castle Estate & Cave Hill Visitor Centre, Castle Ward, Drumglass Park, Laga Valley Regional Park, Mount Stewart, Rowallane Garden, Titanic Memorial Garden and Ulster American Folk Park are few of the charming green paradises. Regarding accommodation, the land is full of several hotels that fall in range of being expensive and also budget ones. Apart from this, there is a multitude of cafes, bars, grills, restaurant and canteens where you can savour new culinary experience. The hotels have dedicated and well-mannered staff who knows how to serve their guests so that they could derive the maximum pleasure of visiting Belfast. Only one reliable option exists for booking online tours to Belfast and that is MakeMyTrip.com. Being India's leading travel portal, here you can get cheap online flight tickets, car rentals and also seasonal discounts. Even if you are a first time traveller, MakeMyTruip helps organizing your entire trip in a transparent way.

Belfast Address
Belfast BT29 4AB, UK
Tel: (028) 9448 4848

About Malmo Aviation