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Cheap flights from Belfast Intl Airport to Southeast Asia from £245

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/4. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — BKK
22 Mar — 29 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Belfast Intl to Southeast Asia

Enter your travel dates to find the best prices.

Cheapest flights from Belfast Intl to Southeast Asia
Explore the most affordable flight options available from Belfast Intl to Southeast Asia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 February 2026.

Sat 29/806:20
BFS
-
KUL
2 stops20h 35m
Multiple Airlines
Sat 26/922:00
KUL
-
BFS
2 stops29h 15m
Multiple Airlines
Deal found 16/2£515
Tue 3/1106:30
BFS
-
BKK
2 stops22h 50m
Multiple Airlines
Thu 26/1101:55
BKK
-
BFS
2 stops36h 45m
Multiple Airlines
Deal found 18/2£518
Tue 24/219:40
BFS
-
BKK
3 stops43h 20m
Multiple Airlines
Thu 12/300:55
BKK
-
BFS
2 stops28h 25m
Multiple Airlines
Deal found 16/2£559
Tue 24/205:45
BFS
-
BKK
1 stop21h 40m
Multiple Airlines
Thu 12/312:25
BKK
-
BFS
1 stop26h 00m
Multiple Airlines
Deal found 16/2£561
Mon 23/222:20
BFS
-
BKK
1 stop29h 05m
Multiple Airlines
Thu 12/312:25
BKK
-
BFS
1 stop26h 00m
Multiple Airlines
Deal found 16/2£562
Wed 25/207:55
BFS
-
BKK
2 stops43h 15m
Multiple Airlines
Thu 12/312:25
BKK
-
BFS
1 stop26h 00m
Multiple Airlines
Deal found 16/2£566
Tue 24/205:45
BFS
-
BKK
1 stop21h 40m
Multiple Airlines
Sun 15/319:10
BKK
-
BFS
3 stops44h 55m
Multiple Airlines
Deal found 16/2£572
Tue 24/205:45
BFS
-
BKK
1 stop21h 40m
Multiple Airlines
Tue 10/319:10
BKK
-
BFS
2 stops45h 10m
Multiple Airlines
Deal found 16/2£580
Mon 16/314:40
BFS
-
BKK
2 stops25h 45m
Multiple Airlines
Mon 23/318:20
BKK
-
BFS
3 stops31h 45m
Multiple Airlines
Deal found 16/2£592
Mon 23/207:50
BFS
-
BKK
2 stops30h 15m
Multiple Airlines
Sun 8/300:55
BKK
-
BFS
3 stops27h 20m
Multiple Airlines
Deal found 18/2£595
Tue 19/508:20
BFS
-
CNX
2 stops47h 05m
Multiple Airlines
Thu 28/514:55
CNX
-
BFS
2 stops34h 35m
Multiple Airlines
Deal found 16/2£614
Thu 23/406:35
BFS
-
SIN
2 stops43h 10m
Multiple Airlines
Thu 30/405:25
SIN
-
BFS
2 stops21h 45m
Multiple Airlines
Deal found 18/2£644

Find flight deals from Belfast Intl to Southeast Asia

Keep the following information in mind while searching for Belfast Intl to Southeast Asia flight deals. Data was last updated 20 February 2026.

Round-trip from

£592

One-way from

£245

Popular in

December

Cheapest in

May

Average price

£849
16/3-23/3
  • 16/3-23/3
  • 5 total stops
  • 57h 30m total
  • Belfast to Southeast Asia
Search Deals
12/4
  • 12/4
  • 3 total stops
  • 39h 25m total
  • Belfast to Southeast Asia
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (£37 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£13 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Belfast Intl to Southeast Asia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 20 February 2026.
Use the filters below to find and compare flights from Belfast Intl Airport to Southeast Asia that are best for you.

Fly from

Belfast Intl

Fly to

Southeast Asia

Route

Depart

Return

Price

BelfastBangkok

BFS - BKK

BFSBKK

Belfast Intl

Mon 16/3

14:40-23:25

2 stops25h 45m

Bangkok Suvarnabhumi

Mon 23/3

18:20-19:05

3 stops31h 45m

£592

BelfastBangkok

BFS - BKK

BFSBKK

Belfast Intl

Tue 10/3

05:45-01:20

2 stops36h 35m

Bangkok Suvarnabhumi

Tue 7/4

17:10-15:15

2 stops28h 05m

£603

BelfastBangkok

BFS - BKK

BFSBKK

Belfast Intl

Thu 11/6

06:10-12:30

2 stops24h 20m

Bangkok Suvarnabhumi

Sun 14/6

16:50-10:05

2 stops23h 15m

£605

BelfastChiang Mai

BFS - CNX

BFSCNX

Belfast Intl

Tue 19/5

08:20-13:25

2 stops47h 05m

Chiang Mai

Thu 28/5

14:55-19:30

2 stops34h 35m

£614

BelfastSingapore

BFS - SIN

BFSSIN

Belfast Intl

Thu 23/4

06:35-08:45

2 stops43h 10m

Singapore Changi

Thu 30/4

05:25-20:10

2 stops21h 45m

£644

BelfastBangkok

BFS - BKK

BFSBKK

Belfast Intl

Mon 16/3

08:50-23:25

2 stops31h 35m

Bangkok Suvarnabhumi

Sun 22/3

19:05-21:15

3 stops33h 10m

£664

BelfastManila

BFS - MNL

BFSMNL

Belfast Intl

Sun 12/7

20:50-17:20

3 stops37h 30m

Manila Ninoy Aquino Intl

Thu 6/8

08:10-19:30

3 stops42h 20m

£705

BelfastKuala Lumpur

BFS - KUL

BFSKUL

Belfast Intl

Fri 20/3

18:00-07:15

1 stop29h 15m

Kuala Lumpur Intl

Sun 29/3

09:35-12:20

2 stops57h 45m

£710

BelfastKuala Lumpur

BFS - KUL

BFSKUL

Belfast Intl

Thu 19/3

17:55-08:25

2 stops30h 30m

Kuala Lumpur Intl

Sun 29/3

18:00-13:05

2 stops26h 05m

£726

BelfastManila

BFS - MNL

BFSMNL

Belfast Intl

Tue 17/3

08:35-01:00

2 stops32h 25m

Manila Ninoy Aquino Intl

Mon 27/4

03:55-20:25

2 stops23h 30m

£753

Flights are sorted by cheapest return flights first.

Deals found on 18/2

Showing 1-10 of 29 results
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Best time to book a flight from Belfast Intl to Southeast Asia

Have a flexible travel schedule? Discover the best time to fly to Southeast Asia from Belfast Intl with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Belfast Intl Airport to Southeast Asia

What is the cheapest month to book a flight from Belfast Intl Airport to Southeast Asia?

Currently, January is the cheapest month in which you can book a flight from Belfast Intl Airport to Southeast Asia (average of £449). Flying from Belfast Intl Airport to Southeast Asia in July is currently the most expensive (average of £737). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Southeast Asia

Get insights into the airlines that provide service to Southeast Asia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Southeast Asia. Reviews last updated 20 February 2026.
See what other customers who have flown with KLM, Qatar Airways, andBritish Airways from Belfast Intl Airport to Southeast Asia have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.7
Good
1,458 reviews
Check prices

Overall

7.7

Crew

8.4

Boarding

7.8

Food

7.3

Entertainment

7.1

Comfort

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
KLM
7.7
Good
1,458 reviews
KLM
7.7
Good
1,458 reviews
Check prices

Overall

7.7

Crew

8.4

Boarding

7.8

Food

7.3

Entertainment

7.1

Comfort

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Qatar Airways
7.4
Good
3,739 reviews
KLM
7.7
Good
1,458 reviews
Check prices

Overall

7.7

Crew

8.4

Boarding

7.8

Food

7.3

Entertainment

7.1

Comfort

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
British Airways
6.7
Okay
7,755 reviews
KLM
7.7
Good
1,458 reviews
Check prices

Overall

7.7

Crew

8.4

Boarding

7.8

Food

7.3

Entertainment

7.1

Comfort

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas

Related info for your journey

Find useful and relevant information for your journey from Belfast Intl to Southeast Asia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the most popular routes from Belfast Intl Airport to Southeast Asia?

    When deciding which route to take from Belfast Intl Airport to Southeast Asia consider Belfast Intl - Bangkok Suvarnabhumi, Belfast Intl - Manila Ninoy Aquino Intl or Belfast Intl - Kuala Lumpur Intl as they are the most popular.

  • Can I find deals for flights from Belfast Intl to Southeast Asia that include hotel bookings?

    Yes. In addition to deals on Belfast Intl to Southeast Asia flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Belfast Intl to Southeast Asia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Belfast Intl to Southeast Asia.

  • Can I find deals for business class flights from Belfast Intl to Southeast Asia?

    Yes. Cheapflights offers flight deals from Belfast Intl to Southeast Asia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Belfast Intl Airport to Southeast Asia?

    Currently, January is the cheapest month in which you can book a flight from Belfast Intl Airport to Southeast Asia (average of £449). Flying from Belfast Intl Airport to Southeast Asia in July is currently the most expensive (average of £737). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 3 airlines flying from Belfast Intl to Southeast Asia

Discover the top 3 airlines that operate flights from Belfast Intl to Southeast Asia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 20 February 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£548Average£806FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£560Average£845FlexibilityNo cancel feeOn-time75%
Search KLM flights
Qatar AirwaysCheapest£863Average£1,138FlexibilityNo cancel feeOn-time68%
Search Qatar Airways flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Belfast Intl to Southeast Asia?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Belfast Intl to Southeast Asia. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Belfast Intl to Southeast Asia?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Belfast Intl to Southeast Asia.

Can Cheapflights find flights from Belfast Intl to Southeast Asia with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Belfast Intl to Southeast Asia, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Belfast Intl to Southeast Asia become cheaper?

Yes, Cheapflights offers price alerts on Belfast Intl to Southeast Asia flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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