Find flights
When to book
Airlines
FAQs

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 21/9. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — BKK
21 Aug — 28 Aug1
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 July 2026.

Wed 2/1207:55
BFS
-
BKK
2 stops36h 45m
Multiple Airlines
Wed 16/1209:20
BKK
-
BFS
1 stop30h 40m
Multiple Airlines
Deal found 22/7£497
Mon 14/919:35
BFS
-
KUL
3 stops36h 15m
Multiple Airlines
Sun 20/922:00
KUL
-
BFS
1 stop22h 05m
Multiple Airlines
Deal found 20/7£498
Mon 7/919:35
BFS
-
KUL
3 stops44h 25m
Multiple Airlines
Sun 13/922:00
KUL
-
BFS
1 stop22h 05m
Multiple Airlines
Deal found 19/7£500
Sun 20/922:10
BFS
-
SIN
3 stops39h 00m
Multiple Airlines
Thu 24/916:10
SIN
-
BFS
2 stops35h 25m
Multiple Airlines
Deal found 21/7£510
Thu 3/908:15
BFS
-
KUL
3 stops31h 45m
Multiple Airlines
Thu 10/922:00
KUL
-
BFS
1 stop28h 20m
Multiple Airlines
Deal found 20/7£521
Tue 1/907:35
BFS
-
KUL
3 stops46h 25m
Multiple Airlines
Tue 8/922:00
KUL
-
BFS
1 stop23h 00m
Multiple Airlines
Deal found 18/7£530
Thu 29/1010:10
BFS
-
BKK
2 stops42h 35m
Multiple Airlines
Thu 12/1114:50
BKK
-
BFS
1 stop24h 55m
Multiple Airlines
Deal found 21/7£613
Thu 12/1106:30
BFS
-
BKK
2 stops22h 50m
Multiple Airlines
Fri 13/1116:50
BKK
-
BFS
2 stops31h 25m
Multiple Airlines
Deal found 21/7£629
Thu 13/806:10
BFS
-
BKK
2 stops24h 20m
Multiple Airlines
Sat 15/802:10
BKK
-
BFS
2 stops35h 35m
Multiple Airlines
Deal found 17/7£639
Thu 3/921:10
BFS
-
DPS
3 stops43h 45m
Multiple Airlines
Thu 10/915:25
DPS
-
BFS
2 stops34h 55m
Multiple Airlines
Deal found 19/7£656
Thu 3/920:40
BFS
-
BKK
2 stops34h 55m
Multiple Airlines
Wed 16/912:45
BKK
-
BFS
1 stop35h 10m
Multiple Airlines
Deal found 20/7£683
Sun 6/907:00
BFS
-
DPS
2 stops33h 05m
Multiple Airlines
Sat 12/913:00
DPS
-
BFS
2 stops36h 35m
Multiple Airlines
Deal found 18/7£685

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 July 2026.

Round-trip from

£498

One-way from

£335

Popular in

December

Cheapest in

September

Average price

£813
14/9-20/9
  • 14/9-20/9
  • 4 total stops
  • 58h 20m total
  • Belfast to Southeast Asia
Search Deals
21/9
  • 21/9
  • 2 total stops
  • 25h 25m total
  • Belfast to Southeast Asia
Search Deals
Highest demand for flights based on searches. 23% potential increase in price (£188 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 9% potential price decrease (£56 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 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 July 2026.
Use the filters below to find and compare flights from Belfast Intl Airport to Southeast Asia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BelfastBangkok

BFS - BKK

BFSBKK

Belfast Intl

Wed 2/12

07:55-03:40

2 stops36h 45m

Bangkok Suvarnabhumi

Wed 16/12

09:20-09:00

1 stop30h 40m

£497

BelfastKuala Lumpur

BFS - KUL

BFSKUL

Belfast Intl

Mon 14/9

19:35-14:50

3 stops36h 15m

Kuala Lumpur Intl

Sun 20/9

22:00-13:05

1 stop22h 05m

£498

BelfastKuala Lumpur

BFS - KUL

BFSKUL

Belfast Intl

Mon 7/9

19:35-23:00

3 stops44h 25m

Kuala Lumpur Intl

Sun 13/9

22:00-13:05

1 stop22h 05m

£500

BelfastSingapore

BFS - SIN

BFSSIN

Belfast Intl

Sun 20/9

22:10-20:10

3 stops39h 00m

Singapore Changi

Thu 24/9

16:10-20:35

2 stops35h 25m

£510

BelfastKuala Lumpur

BFS - KUL

BFSKUL

Belfast Intl

Tue 1/9

07:35-13:00

3 stops46h 25m

Kuala Lumpur Intl

Tue 8/9

22:00-14:00

1 stop23h 00m

£530

BelfastKuala Lumpur

BFS - KUL

BFSKUL

Belfast Intl

Thu 3/9

14:25-19:45

2 stops22h 20m

Kuala Lumpur Intl

Thu 10/9

22:00-19:20

1 stop28h 20m

£545

BelfastBangkok

BFS - BKK

BFSBKK

Belfast Intl

Thu 13/8

06:10-12:30

2 stops24h 20m

Bangkok Suvarnabhumi

Sat 15/8

02:10-07:45

2 stops35h 35m

£639

BelfastDenpasar

BFS - DPS

BFSDPS

Belfast Intl

Thu 3/9

21:10-23:55

3 stops43h 45m

Denpasar Bali Ngurah Rai

Thu 10/9

15:25-19:20

2 stops34h 55m

£656

BelfastBangkok

BFS - BKK

BFSBKK

Belfast Intl

Mon 18/1

17:55-07:20

1 stop30h 25m

Bangkok Suvarnabhumi

Mon 25/1

09:20-10:40

1 stop32h 20m

£681

BelfastBangkok

BFS - BKK

BFSBKK

Belfast Intl

Thu 3/9

20:40-13:35

2 stops34h 55m

Bangkok Suvarnabhumi

Wed 16/9

12:45-17:55

1 stop35h 10m

£683

Flights are sorted by cheapest return flights first.

Deals found on 18/7

Showing 1-10 of 31 resultsSorted by cheapest first
1
2
3
4

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 £558). Flying from Belfast Intl Airport to Southeast Asia in December is currently the most expensive (average of £1,586). 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 July 2026.
See what other customers who have flown with KLM,China Southern, andQatar 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
7.8
Good
1,543 reviews
Check prices

Boarding

7.8

Comfort

7.7

Overall

7.8

Food

7.3

Crew

8.4

Entertainment

7.2

Reviews

1 / 20
4.0
Okay

Subhash,Jul 2026

CDG - ATL

The priority tag for bags were taken out. 1 bag is missing. Food was worst for AVML. The food was dry and burnt.
KLM
7.8
Good
1,543 reviews
KLM
7.8
Good
1,543 reviews
Check prices

Boarding

7.8

Comfort

7.7

Overall

7.8

Food

7.3

Crew

8.4

Entertainment

7.2

Reviews

1 / 20
4.0
Okay

Subhash,Jul 2026

CDG - ATL

The priority tag for bags were taken out. 1 bag is missing. Food was worst for AVML. The food was dry and burnt.
China Southern
7.4
Good
164 reviews
KLM
7.8
Good
1,543 reviews
Check prices

Boarding

7.8

Comfort

7.7

Overall

7.8

Food

7.3

Crew

8.4

Entertainment

7.2

Reviews

1 / 20
4.0
Okay

Subhash,Jul 2026

CDG - ATL

The priority tag for bags were taken out. 1 bag is missing. Food was worst for AVML. The food was dry and burnt.
Qatar Airways
7.3
Good
3,748 reviews
KLM
7.8
Good
1,543 reviews
Check prices

Boarding

7.8

Comfort

7.7

Overall

7.8

Food

7.3

Crew

8.4

Entertainment

7.2

Reviews

1 / 20
4.0
Okay

Subhash,Jul 2026

CDG - ATL

The priority tag for bags were taken out. 1 bag is missing. Food was worst for AVML. The food was dry and burnt.
British Airways
6.7
Okay
8,124 reviews
KLM
7.8
Good
1,543 reviews
Check prices

Boarding

7.8

Comfort

7.7

Overall

7.8

Food

7.3

Crew

8.4

Entertainment

7.2

Reviews

1 / 20
4.0
Okay

Subhash,Jul 2026

CDG - ATL

The priority tag for bags were taken out. 1 bag is missing. Food was worst for AVML. The food was dry and burnt.

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 - Manila Ninoy Aquino Intl, Belfast Intl - Denpasar Bali Ngurah Rai or Belfast Intl - Bangkok Suvarnabhumi 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 £558). Flying from Belfast Intl Airport to Southeast Asia in December is currently the most expensive (average of £1,586). 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 4 airlines flying from Belfast Intl to Southeast Asia

Discover the top 4 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 July 2026.
AirlineCheapestAverageFlexibilityOn-time
China SouthernCheapest£451Average£759FlexibilityNo cancel feeOn-time69%
Search China Southern flights
British AirwaysCheapest£655Average£773FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£657Average£920FlexibilityNo cancel feeOn-time75%
Search KLM flights
Qatar AirwaysCheapest£903Average£1,031FlexibilityNo 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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.