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Cheap flights from Belfast Intl Airport to Southeast Asia from £259

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 15/2. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — BKK
7 Feb — 14 Feb1
1 adult
1 adult, Economy, 0 bags

Cheap 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 8 January 2026.

Round-trip from

£443

One-way from

£259

Popular in

December

Cheapest in

May

Average price

£724
22/1-8/2
  • 22/1-8/2
  • 4 total stops
  • 57h 55m total
  • Belfast to Southeast Asia
Search Deals
15/2
  • 15/2
  • 3 total stops
  • 49h 45m total
  • Belfast to Southeast Asia
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£49 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

Find 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 8 January 2026.

Thu 22/106:30BFS - BKK
2 stops28h 55mMultiple Airlines
Sun 8/219:55BKK - BFS
2 stops29h 00mMultiple Airlines
Deal found 7/1£443
Sat 21/205:45BFS - HKT
3 stops22h 45mMultiple Airlines
Sat 28/212:35HKT - BFS
3 stops40h 45mMultiple Airlines
Deal found 7/1£470
Mon 16/215:00BFS - HKT
3 stops47h 45mMultiple Airlines
Thu 26/219:10HKT - BFS
3 stops32h 55mMultiple Airlines
Deal found 8/1£486
Sun 25/105:45BFS - HKT
3 stops33h 00mMultiple Airlines
Mon 2/222:05HKT - BFS
2 stops29h 10mMultiple Airlines
Deal found 7/1£526
Sun 22/223:05BFS - BKK
3 stops39h 00mMultiple Airlines
Sun 1/315:30BKK - BFS
2 stops34h 25mMultiple Airlines
Deal found 8/1£527
Fri 20/206:00BFS - KUL
3 stops42h 45mMultiple Airlines
Fri 27/209:35KUL - BFS
2 stops31h 15mMultiple Airlines
Deal found 6/1£539
Mon 11/506:10BFS - HKT
2 stops33h 50mMultiple Airlines
Mon 25/500:20HKT - BFS
2 stops37h 10mMultiple Airlines
Deal found 6/1£563
Thu 19/219:45BFS - DPS
3 stops38h 50mMultiple Airlines
Thu 26/217:35DPS - BFS
3 stops35h 30mMultiple Airlines
Deal found 8/1£576
Mon 9/206:30BFS - BKK
2 stops22h 50mMultiple Airlines
Sun 1/301:55BKK - BFS
2 stops39h 10mMultiple Airlines
Deal found 7/1£581
Tue 1/914:45BFS - BKK
2 stops18h 05mMultiple Airlines
Tue 22/912:35BKK - BFS
2 stops27h 40mMultiple Airlines
Deal found 7/1£595
Sun 22/207:10BFS - KUL
2 stops28h 25mMultiple Airlines
Sun 1/321:40KUL - BFS
2 stops29h 15mMultiple Airlines
Deal found 8/1£600
Sun 22/207:10BFS - DPS
3 stops26h 40mMultiple Airlines
Sun 1/311:10DPS - BFS
3 stops42h 45mMultiple Airlines
Deal found 8/1£615

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 8 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

Thu 22/1

06:30-18:25

2 stops28h 55m

Bangkok Suvarnabhumi

Sun 8/2

19:55-17:55

2 stops29h 00m

£443

BelfastPhuket City

BFS - HKT

BFSHKT

Belfast Intl

Sat 21/2

05:45-11:30

3 stops22h 45m

Phuket City

Sat 28/2

12:35-22:20

3 stops40h 45m

£470

BelfastPhuket City

BFS - HKT

BFSHKT

Belfast Intl

Mon 16/2

15:00-21:45

3 stops47h 45m

Phuket City

Thu 26/2

19:10-21:05

3 stops32h 55m

£486

BelfastPhuket City

BFS - HKT

BFSHKT

Belfast Intl

Sun 25/1

05:45-21:45

3 stops33h 00m

Phuket City

Mon 2/2

22:05-20:15

2 stops29h 10m

£526

BelfastBangkok

BFS - BKK

BFSBKK

Belfast Intl

Sun 22/2

23:05-21:05

3 stops39h 00m

Bangkok Suvarnabhumi

Sun 1/3

15:30-18:55

2 stops34h 25m

£527

BelfastKuala Lumpur

BFS - KUL

BFSKUL

Belfast Intl

Fri 20/2

06:00-08:45

3 stops42h 45m

Kuala Lumpur Intl

Fri 27/2

09:35-08:50

2 stops31h 15m

£539

BelfastPhuket City

BFS - HKT

BFSHKT

Belfast Intl

Mon 11/5

06:10-22:00

2 stops33h 50m

Phuket City

Mon 25/5

00:20-07:30

2 stops37h 10m

£563

BelfastDenpasar

BFS - DPS

BFSDPS

Belfast Intl

Thu 19/2

19:45-18:35

3 stops38h 50m

Denpasar Bali Ngurah Rai

Thu 26/2

17:35-21:05

3 stops35h 30m

£576

BelfastBangkok

BFS - BKK

BFSBKK

Belfast Intl

Mon 9/2

06:30-12:20

2 stops22h 50m

Bangkok Suvarnabhumi

Sun 1/3

01:55-10:05

2 stops39h 10m

£581

BelfastKuala Lumpur

BFS - KUL

BFSKUL

Belfast Intl

Sun 22/2

07:10-19:35

2 stops28h 25m

Kuala Lumpur Intl

Sun 1/3

21:40-18:55

2 stops29h 15m

£600

Flights are sorted by cheapest return flights first.

Deals found on 7/1

Showing 1-10 of 34 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, May is the cheapest month in which you can book a flight from Belfast Intl Airport to Southeast Asia (average of £546). 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 8 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
1,434 reviews
Check prices

Comfort

7.6

Entertainment

7.1

Food

7.2

Overall

7.7

Boarding

7.8

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
KLM
7.7
Good
1,434 reviews
KLM
7.7
Good
1,434 reviews
Check prices

Comfort

7.6

Entertainment

7.1

Food

7.2

Overall

7.7

Boarding

7.8

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Qatar Airways
7.4
Good
3,702 reviews
KLM
7.7
Good
1,434 reviews
Check prices

Comfort

7.6

Entertainment

7.1

Food

7.2

Overall

7.7

Boarding

7.8

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
British Airways
6.7
Okay
7,659 reviews
KLM
7.7
Good
1,434 reviews
Check prices

Comfort

7.6

Entertainment

7.1

Food

7.2

Overall

7.7

Boarding

7.8

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle

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 - Phuket City or Belfast Intl - Manila Ninoy Aquino 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, May is the cheapest month in which you can book a flight from Belfast Intl Airport to Southeast Asia (average of £546). 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

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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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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 8 January 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£547Average£807FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£557Average£847FlexibilityNo cancel feeOn-time75%
Search KLM flights
Qatar AirwaysCheapest£813Average£1,100FlexibilityNo 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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