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Cheap flights from Belfast Intl Airport to Southeast Asia from £252

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 15/3. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — BKK
15 Mar — 22 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 13 February 2026.

Tue 17/213:55
BFS
-
BKK
2 stops25h 30m
Multiple Airlines
Tue 3/319:55
BKK
-
BFS
2 stops31h 15m
Multiple Airlines
Deal found 11/2£467
Sun 10/522:10
BFS
-
SIN
2 stops58h 25m
Multiple Airlines
Sun 7/600:55
SIN
-
BFS
2 stops37h 30m
Multiple Airlines
Deal found 12/2£530
Tue 24/205:45
BFS
-
BKK
2 stops36h 35m
Multiple Airlines
Thu 12/312:25
BKK
-
BFS
1 stop26h 00m
Multiple Airlines
Deal found 12/2£546
Wed 25/208:50
BFS
-
BKK
2 stops34h 25m
Multiple Airlines
Fri 13/303:15
BKK
-
BFS
2 stops36h 10m
Multiple Airlines
Deal found 12/2£547
Wed 25/207:55
BFS
-
BKK
1 stop27h 05m
Multiple Airlines
Tue 17/319:10
BKK
-
BFS
2 stops45h 10m
Multiple Airlines
Deal found 11/2£548
Wed 11/306:00
BFS
-
SIN
3 stops31h 30m
Multiple Airlines
Fri 20/320:00
SIN
-
BFS
2 stops27h 10m
Multiple Airlines
Deal found 9/2£548
Wed 25/207:55
BFS
-
BKK
1 stop27h 05m
Multiple Airlines
Thu 12/319:10
BKK
-
BFS
3 stops44h 40m
Multiple Airlines
Deal found 11/2£551
Tue 24/213:55
BFS
-
BKK
2 stops28h 25m
Multiple Airlines
Wed 11/312:30
BKK
-
BFS
1 stop27h 50m
Multiple Airlines
Deal found 11/2£577
Tue 24/205:45
BFS
-
BKK
1 stop21h 40m
Multiple Airlines
Tue 17/319:10
BKK
-
BFS
2 stops45h 10m
Multiple Airlines
Deal found 12/2£579
Mon 20/406:10
BFS
-
HKT
2 stops34h 35m
Multiple Airlines
Wed 29/400:20
HKT
-
BFS
2 stops37h 35m
Multiple Airlines
Deal found 12/2£582
Tue 24/205:45
BFS
-
BKK
1 stop21h 40m
Multiple Airlines
Sun 15/319:10
BKK
-
BFS
3 stops44h 55m
Multiple Airlines
Deal found 12/2£583
Thu 26/219:45
BFS
-
BKK
1 stop31h 40m
Multiple Airlines
Thu 12/319:10
BKK
-
BFS
3 stops44h 40m
Multiple Airlines
Deal found 12/2£587

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 13 February 2026.

Round-trip from

£530

One-way from

£252

Popular in

December

Cheapest in

May

Average price

£839
10/5-7/6
  • 10/5-7/6
  • 4 total stops
  • 95h 55m total
  • Belfast to Southeast Asia
Search Deals
15/3
  • 15/3
  • 3 total stops
  • 55h 00m 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 13 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

BelfastSingapore

BFS - SIN

BFSSIN

Belfast Intl

Sun 10/5

22:10-15:35

2 stops58h 25m

Singapore Changi

Sun 7/6

00:55-07:25

2 stops37h 30m

£530

BelfastBangkok

BFS - BKK

BFSBKK

Belfast Intl

Tue 24/2

05:45-01:20

2 stops36h 35m

Bangkok Suvarnabhumi

Thu 12/3

12:25-07:25

1 stop26h 00m

£546

BelfastBangkok

BFS - BKK

BFSBKK

Belfast Intl

Wed 25/2

08:50-02:15

2 stops34h 25m

Bangkok Suvarnabhumi

Fri 13/3

03:15-08:25

2 stops36h 10m

£547

BelfastBangkok

BFS - BKK

BFSBKK

Belfast Intl

Wed 25/2

07:55-18:00

1 stop27h 05m

Bangkok Suvarnabhumi

Tue 17/3

19:10-09:20

2 stops45h 10m

£548

BelfastSingapore

BFS - SIN

BFSSIN

Belfast Intl

Wed 11/3

06:00-21:30

3 stops31h 30m

Singapore Changi

Fri 20/3

20:00-15:10

2 stops27h 10m

£548

BelfastBangkok

BFS - BKK

BFSBKK

Belfast Intl

Wed 25/2

07:55-18:00

1 stop27h 05m

Bangkok Suvarnabhumi

Thu 12/3

19:10-08:50

3 stops44h 40m

£551

BelfastBangkok

BFS - BKK

BFSBKK

Belfast Intl

Tue 24/2

13:55-01:20

2 stops28h 25m

Bangkok Suvarnabhumi

Wed 11/3

12:30-09:20

1 stop27h 50m

£577

BelfastBangkok

BFS - BKK

BFSBKK

Belfast Intl

Tue 24/2

05:45-10:25

1 stop21h 40m

Bangkok Suvarnabhumi

Tue 17/3

19:10-09:20

2 stops45h 10m

£579

BelfastPhuket City

BFS - HKT

BFSHKT

Belfast Intl

Mon 20/4

06:10-22:45

2 stops34h 35m

Phuket City

Wed 29/4

00:20-07:55

2 stops37h 35m

£582

BelfastBangkok

BFS - BKK

BFSBKK

Belfast Intl

Thu 26/2

19:45-10:25

1 stop31h 40m

Bangkok Suvarnabhumi

Thu 12/3

19:10-08:50

3 stops44h 40m

£587

Flights are sorted by cheapest return flights first.

Deals found on 10/2

Showing 1-10 of 41 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 £444). Flying from Belfast Intl Airport to Southeast Asia in July is currently the most expensive (average of £728). 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 13 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
1,452 reviews
Check prices

Overall

7.7

Food

7.3

Boarding

7.8

Comfort

7.6

Crew

8.4

Entertainment

7.1

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
1,452 reviews
KLM
7.7
Good
1,452 reviews
Check prices

Overall

7.7

Food

7.3

Boarding

7.8

Comfort

7.6

Crew

8.4

Entertainment

7.1

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
3,731 reviews
KLM
7.7
Good
1,452 reviews
Check prices

Overall

7.7

Food

7.3

Boarding

7.8

Comfort

7.6

Crew

8.4

Entertainment

7.1

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
7,733 reviews
KLM
7.7
Good
1,452 reviews
Check prices

Overall

7.7

Food

7.3

Boarding

7.8

Comfort

7.6

Crew

8.4

Entertainment

7.1

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 - Denpasar Bali Ngurah Rai 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 £444). Flying from Belfast Intl Airport to Southeast Asia in July is currently the most expensive (average of £728). 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 13 February 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£542Average£796FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£553Average£835FlexibilityNo cancel feeOn-time75%
Search KLM flights
Qatar AirwaysCheapest£851Average£1,112FlexibilityNo 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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