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Cheap flights from Belfast Intl Airport to Southeast Asia from £335

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 3/4. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — BKK
21 Feb — 28 Feb1
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 22 January 2026.

Wed 4/306:30
BFS
-
BKK
2 stops28h 20m
Multiple Airlines
Wed 11/319:05
BKK
-
BFS
2 stops22h 00m
Multiple Airlines
Deal found 20/1£481
Tue 3/319:40
BFS
-
SIN
3 stops37h 40m
Multiple Airlines
Wed 18/319:40
SIN
-
BFS
2 stops28h 30m
Multiple Airlines
Deal found 20/1£497
Mon 11/508:15
BFS
-
HKT
2 stops31h 45m
Multiple Airlines
Mon 25/500:20
HKT
-
BFS
2 stops37h 10m
Multiple Airlines
Deal found 21/1£543
Fri 6/307:05
BFS
-
HKT
2 stops32h 05m
Multiple Airlines
Fri 13/322:05
HKT
-
BFS
2 stops30h 55m
Multiple Airlines
Deal found 20/1£552
Tue 17/219:40
BFS
-
BKK
3 stops42h 25m
Multiple Airlines
Tue 24/208:10
BKK
-
BFS
3 stops41h 40m
Multiple Airlines
Deal found 20/1£581
Sat 7/306:00
BFS
-
BKK
2 stops25h 30m
Multiple Airlines
Sat 14/315:55
BKK
-
BFS
3 stops35h 20m
Multiple Airlines
Deal found 21/1£613
Sun 8/312:25
BFS
-
BKK
2 stops27h 00m
Multiple Airlines
Mon 23/318:20
BKK
-
BFS
3 stops25h 50m
Multiple Airlines
Deal found 21/1£617
Fri 6/308:05
BFS
-
KUL
3 stops24h 05m
Multiple Airlines
Fri 13/308:20
KUL
-
BFS
3 stops34h 00m
Multiple Airlines
Deal found 20/1£625
Sat 7/322:25
BFS
-
DPS
3 stops35h 25m
Multiple Airlines
Sat 14/309:25
DPS
-
BFS
3 stops32h 45m
Multiple Airlines
Deal found 21/1£632
Fri 6/306:30
BFS
-
MNL
2 stops34h 30m
Multiple Airlines
Thu 12/302:05
MNL
-
BFS
2 stops28h 15m
Multiple Airlines
Deal found 20/1£637
Wed 18/207:55
BFS
-
BKK
2 stops32h 30m
Multiple Airlines
Wed 25/214:40
BKK
-
BFS
2 stops32h 30m
Multiple Airlines
Deal found 21/1£649
Fri 20/206:30
BFS
-
MNL
2 stops35h 10m
Multiple Airlines
Sat 7/303:55
MNL
-
BFS
2 stops36h 25m
Multiple Airlines
Deal found 21/1£660

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 22 January 2026.

Round-trip from

£481

One-way from

£335

Popular in

December

Cheapest in

May

Average price

£727
4/3-11/3
  • 4/3-11/3
  • 4 total stops
  • 50h 20m total
  • Belfast to Southeast Asia
Search Deals
3/4
  • 3/4
  • 3 total stops
  • 59h 30m total
  • Belfast to Southeast Asia
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£50 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£21 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 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 22 January 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

Wed 4/3

06:30-17:50

2 stops28h 20m

Bangkok Suvarnabhumi

Wed 11/3

19:05-10:05

2 stops22h 00m

£481

BelfastSingapore

BFS - SIN

BFSSIN

Belfast Intl

Tue 3/3

19:40-17:20

3 stops37h 40m

Singapore Changi

Wed 18/3

19:40-16:10

2 stops28h 30m

£497

BelfastPhuket City

BFS - HKT

BFSHKT

Belfast Intl

Mon 11/5

08:15-22:00

2 stops31h 45m

Phuket City

Mon 25/5

00:20-07:30

2 stops37h 10m

£543

BelfastPhuket City

BFS - HKT

BFSHKT

Belfast Intl

Fri 6/3

07:05-22:10

2 stops32h 05m

Phuket City

Fri 13/3

22:05-22:00

2 stops30h 55m

£552

BelfastBangkok

BFS - BKK

BFSBKK

Belfast Intl

Sat 7/3

10:50-04:05

2 stops34h 15m

Bangkok Suvarnabhumi

Sat 14/3

19:55-20:15

2 stops31h 20m

£613

BelfastBangkok

BFS - BKK

BFSBKK

Belfast Intl

Sun 8/3

12:25-22:25

2 stops27h 00m

Bangkok Suvarnabhumi

Mon 23/3

18:20-13:10

3 stops25h 50m

£617

BelfastKuala Lumpur

BFS - KUL

BFSKUL

Belfast Intl

Fri 6/3

08:05-16:10

3 stops24h 05m

Kuala Lumpur Intl

Fri 13/3

08:20-10:20

3 stops34h 00m

£625

BelfastDenpasar

BFS - DPS

BFSDPS

Belfast Intl

Sat 7/3

22:25-17:50

3 stops35h 25m

Denpasar Bali Ngurah Rai

Sat 14/3

09:25-10:10

3 stops32h 45m

£632

BelfastManila

BFS - MNL

BFSMNL

Belfast Intl

Fri 6/3

06:30-01:00

2 stops34h 30m

Manila Ninoy Aquino Intl

Thu 12/3

02:05-22:20

2 stops28h 15m

£637

BelfastBangkok

BFS - BKK

BFSBKK

Belfast Intl

Tue 17/2

08:35-23:25

2 stops31h 50m

Bangkok Suvarnabhumi

Tue 24/2

14:40-21:50

2 stops38h 10m

£643

Flights are sorted by cheapest return flights first.

Deals found on 21/1

Showing 1-10 of 22 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 £451). Flying from Belfast Intl Airport to Southeast Asia in July is currently the most expensive (average of £726). 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 22 January 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
1,442 reviews
Check prices

Entertainment

7.1

Overall

7.7

Comfort

7.6

Crew

8.4

Food

7.3

Boarding

7.8

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
KLM
7.7
Good
1,442 reviews
KLM
7.7
Good
1,442 reviews
Check prices

Entertainment

7.1

Overall

7.7

Comfort

7.6

Crew

8.4

Food

7.3

Boarding

7.8

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Qatar Airways
7.4
Good
3,717 reviews
KLM
7.7
Good
1,442 reviews
Check prices

Entertainment

7.1

Overall

7.7

Comfort

7.6

Crew

8.4

Food

7.3

Boarding

7.8

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
British Airways
6.7
Okay
7,690 reviews
KLM
7.7
Good
1,442 reviews
Check prices

Entertainment

7.1

Overall

7.7

Comfort

7.6

Crew

8.4

Food

7.3

Boarding

7.8

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.

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 £451). Flying from Belfast Intl Airport to Southeast Asia in July is currently the most expensive (average of £726). 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

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Alternative routes for Belfast Intl to Southeast Asia

See prices for flight routes from nearby airports that may be better suited for you.
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Belfast Intl to Chiang Mai flights

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 22 January 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£550Average£810FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£562Average£846FlexibilityNo cancel feeOn-time75%
Search KLM flights
Qatar AirwaysCheapest£842Average£1,115FlexibilityNo 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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