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Cheap flights from Belfast Intl Airport to Southeast Asia from £349

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 2/6. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — BKK
6 Jun — 13 Jun1
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 7 May 2026.

Thu 28/521:10
BFS
-
BKK
2 stops33h 25m
Multiple Airlines
Thu 11/622:35
BKK
-
BFS
2 stops26h 45m
Multiple Airlines
Deal found 5/5£602
Thu 18/606:10
BFS
-
BKK
2 stops24h 25m
Multiple Airlines
Tue 21/722:35
BKK
-
BFS
2 stops29h 50m
Multiple Airlines
Deal found 6/5£606
Mon 1/607:00
BFS
-
BKK
2 stops30h 55m
Multiple Airlines
Sun 7/601:00
BKK
-
BFS
2 stops28h 10m
Multiple Airlines
Deal found 4/5£649
Tue 16/607:35
BFS
-
BKK
2 stops34h 30m
Multiple Airlines
Mon 22/601:50
BKK
-
BFS
2 stops25h 05m
Multiple Airlines
Deal found 6/5£675
Tue 2/620:15
BFS
-
HKT
3 stops43h 45m
Multiple Airlines
Wed 24/622:55
HKT
-
BFS
2 stops22h 25m
Multiple Airlines
Deal found 6/5£685
Tue 2/608:20
BFS
-
BKK
2 stops34h 20m
Multiple Airlines
Tue 9/616:50
BKK
-
BFS
2 stops23h 05m
Multiple Airlines
Deal found 5/5£686
Tue 27/1017:05
BFS
-
BKK
2 stops29h 15m
Multiple Airlines
Tue 17/1107:45
BKK
-
BFS
1 stop19h 25m
Multiple Airlines
Deal found 6/5£688
Tue 16/606:40
BFS
-
SIN
2 stops28h 15m
Multiple Airlines
Tue 23/610:25
SIN
-
BFS
2 stops29h 45m
Multiple Airlines
Deal found 4/5£722
Thu 1/1008:10
BFS
-
MNL
2 stops29h 40m
Multiple Airlines
Thu 29/1021:40
MNL
-
BFS
2 stops30h 45m
Multiple Airlines
Deal found 4/5£722
Wed 17/606:05
BFS
-
SIN
2 stops32h 10m
Multiple Airlines
Tue 23/603:15
SIN
-
BFS
2 stops26h 45m
Multiple Airlines
Deal found 3/5£734
Mon 8/618:50
BFS
-
MNL
3 stops47h 30m
Multiple Airlines
Sat 20/603:45
MNL
-
BFS
3 stops36h 05m
Multiple Airlines
Deal found 3/5£735
Sat 7/1115:10
BFS
-
KUL
3 stops31h 20m
Multiple Airlines
Sat 14/1122:00
KUL
-
BFS
2 stops25h 25m
Multiple Airlines
Deal found 4/5£738

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 7 May 2026.

Round-trip from

£602

One-way from

£349

Popular in

December

Cheapest in

August

Average price

£617
28/5-11/6
  • 28/5-11/6
  • 4 total stops
  • 60h 10m total
  • Belfast to Southeast Asia
Search Deals
2/6
  • 2/6
  • 3 total stops
  • 32h 20m total
  • Belfast to Southeast Asia
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£54 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 May 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 7 May 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

BelfastPhuket City

BFS - HKT

BFSHKT

Belfast Intl

Tue 2/6

20:15-22:00

3 stops43h 45m

Phuket City

Wed 24/6

22:55-15:20

2 stops22h 25m

£685

BelfastBangkok

BFS - BKK

BFSBKK

Belfast Intl

Tue 2/6

08:20-00:40

2 stops34h 20m

Bangkok Suvarnabhumi

Tue 9/6

16:50-09:55

2 stops23h 05m

£686

BelfastSingapore

BFS - SIN

BFSSIN

Belfast Intl

Tue 16/6

06:40-17:55

2 stops28h 15m

Singapore Changi

Tue 23/6

10:25-09:10

2 stops29h 45m

£722

BelfastManila

BFS - MNL

BFSMNL

Belfast Intl

Thu 1/10

08:10-20:50

2 stops29h 40m

Manila Ninoy Aquino Intl

Thu 29/10

21:40-20:25

2 stops30h 45m

£722

BelfastSingapore

BFS - SIN

BFSSIN

Belfast Intl

Wed 17/6

06:05-21:15

2 stops32h 10m

Singapore Changi

Tue 23/6

03:15-23:00

2 stops26h 45m

£734

BelfastBangkok

BFS - BKK

BFSBKK

Belfast Intl

Sun 31/5

13:25-16:55

2 stops21h 30m

Bangkok Suvarnabhumi

Sun 7/6

22:25-18:25

2 stops26h 00m

£767

BelfastBangkok

BFS - BKK

BFSBKK

Belfast Intl

Mon 18/5

08:40-10:40

2 stops20h 00m

Bangkok Suvarnabhumi

Sun 14/6

22:45-21:30

2 stops28h 45m

£775

BelfastBangkok

BFS - BKK

BFSBKK

Belfast Intl

Tue 3/11

08:20-00:55

2 stops33h 35m

Bangkok Suvarnabhumi

Tue 24/11

07:45-07:30

1 stop30h 45m

£793

BelfastDenpasar

BFS - DPS

BFSDPS

Belfast Intl

Tue 2/6

08:00-00:10

3 stops33h 10m

Denpasar Bali Ngurah Rai

Wed 10/6

13:40-15:20

3 stops32h 40m

£799

BelfastManila

BFS - MNL

BFSMNL

Belfast Intl

Sun 21/6

22:10-21:50

3 stops40h 40m

Manila Ninoy Aquino Intl

Sat 27/6

03:45-08:15

3 stops35h 30m

£799

Flights are sorted by cheapest return flights first.

Deals found on 5/5

Showing 1-10 of 36 resultsSorted by cheapest first
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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 £445). Flying from Belfast Intl Airport to Southeast Asia in July is currently the most expensive (average of £947). 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 7 May 2026.
See what other customers who have flown with KLM,Qatar Airways, andChina Southern 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
1,511 reviews
Check prices

Food

7.3

Overall

7.8

Comfort

7.7

Boarding

7.8

Crew

8.4

Entertainment

7.2

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
KLM
7.8
Good
1,511 reviews
KLM
7.8
Good
1,511 reviews
Check prices

Food

7.3

Overall

7.8

Comfort

7.7

Boarding

7.8

Crew

8.4

Entertainment

7.2

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Qatar Airways
7.4
Good
3,728 reviews
KLM
7.8
Good
1,511 reviews
Check prices

Food

7.3

Overall

7.8

Comfort

7.7

Boarding

7.8

Crew

8.4

Entertainment

7.2

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
China Southern
7.4
Good
151 reviews
KLM
7.8
Good
1,511 reviews
Check prices

Food

7.3

Overall

7.8

Comfort

7.7

Boarding

7.8

Crew

8.4

Entertainment

7.2

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
British Airways
6.7
Okay
7,952 reviews
KLM
7.8
Good
1,511 reviews
Check prices

Food

7.3

Overall

7.8

Comfort

7.7

Boarding

7.8

Crew

8.4

Entertainment

7.2

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful

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 - Kuala Lumpur Intl 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, January is the cheapest month in which you can book a flight from Belfast Intl Airport to Southeast Asia (average of £445). Flying from Belfast Intl Airport to Southeast Asia in July is currently the most expensive (average of £947). 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 7 May 2026.
AirlineCheapestAverageFlexibilityOn-time
China SouthernCheapest£445Average£710FlexibilityNo cancel feeOn-time69%
Search China Southern flights
British AirwaysCheapest£541Average£814FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£568Average£879FlexibilityNo cancel feeOn-time75%
Search KLM flights
Qatar AirwaysCheapest£863Average£1,179FlexibilityNo 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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