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Cheap flights from the United Kingdom to Southeast Asia from £292

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from the United Kingdom to Southeast Asia departing on 12/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from the United Kingdom to Southeast Asia

Recent return flight deals from the United Kingdom to Southeast Asia

Enter your travel dates to find the best prices.
Air China Logo
17:40 - 18:05
LHR
-
BKK
17h 25m1 stop
Air China Logo
01:30 - 17:50
BKK
-
LHR
23h 20m1 stop
£440Air China
Thu, 5 Feb - Mon, 2 Mar
Multiple Airlines Logo
06:10 - 14:30
STN
-
BKK
25h 20m2 stops
Multiple Airlines Logo
14:30 - 22:15
BKK
-
STN
38h 45m3 stops
£440Multiple Airlines
Thu, 26 Feb - Thu, 5 Mar
China Southern Logo
17:15 - 01:40
LHR
-
BKK
25h 25m2 stops
China Southern Logo
11:25 - 18:35
BKK
-
LHR
38h 10m1 stop
£440China Southern
Wed, 7 Jan - Fri, 6 Mar
Multiple Airlines Logo
10:30 - 15:40
LGW
-
BKK
22h 10m2 stops
Multiple Airlines Logo
10:40 - 14:00
BKK
-
LGW
34h 20m2 stops
£440Multiple Airlines
Sun, 25 Jan - Wed, 4 Feb
Multiple Airlines Logo
08:20 - 01:05
STN
-
BKK
33h 45m3 stops
Multiple Airlines Logo
22:05 - 23:10
BKK
-
STN
32h 05m2 stops
£440Multiple Airlines
Fri, 16 Jan - Fri, 30 Jan
British Airways Logo
22:15 - 16:05
LGW
-
BKK
11h 50mdirect
British Airways Logo
22:35 - 05:55
BKK
-
LGW
13h 20mdirect
£441British Airways
Sat, 2 May - Sun, 24 May
British Airways Logo
22:15 - 16:05
LGW
-
BKK
11h 50mdirect
British Airways Logo
22:35 - 05:55
BKK
-
LGW
13h 20mdirect
£442British Airways
Thu, 30 Apr - Sun, 3 May
China Southern Logo
22:00 - 11:25
LHR
-
BKK
30h 25m1 stop
China Southern Logo
02:10 - 17:55
BKK
-
LHR
22h 45m2 stops
£443China Southern
Wed, 11 Mar - Wed, 25 Mar
SAUDIA Logo
22:10 - 00:10
LHR
-
BKK
20h 00m1 stop
SAUDIA Logo
01:50 - 12:40
BKK
-
LHR
16h 50m1 stop
£443SAUDIA
Thu, 16 Apr - Wed, 29 Apr
Etihad Airways Logo
08:50 - 19:35
LHR
-
KUL
26h 45m1 stop
Etihad Airways Logo
09:35 - 12:05
KUL
-
LHR
34h 30m1 stop
£494Etihad Airways
Thu, 29 Jan - Sat, 7 Feb

Air China flights from United Kingdom to Southeast Asia

Our best Air China deals on United Kingdom to Southeast Asia flight tickets
Air China
5 Feb
LHR17:40London Heathrow
17h 25m
1 stop
BKK18:05Bangkok Suvarnabhumi
2 Mar
BKK01:30Bangkok Suvarnabhumi
23h 20m
1 stop
LHR17:50London Heathrow
£440
Find similar
Air China
6 Jan
LGW11:05London Gatwick
31h 25m
1 stop
BKK01:30Bangkok Suvarnabhumi
11 Feb
BKK23:50Bangkok Suvarnabhumi
36h 45m
1 stop
LGW05:35London Gatwick
£443
Find similar
Air China
23 Mar
LGW11:05London Gatwick
31h 25m
1 stop
BKK01:30Bangkok Suvarnabhumi
5 Apr
BKK19:35Bangkok Suvarnabhumi
17h 10m
1 stop
LGW06:45London Gatwick
£444
Find similar

China Southern flights from United Kingdom to Southeast Asia

Our best China Southern deals on United Kingdom to Southeast Asia flight tickets
China Southern
7 Jan
LHR17:15London Heathrow
25h 25m
2 stops
BKK01:40Bangkok Suvarnabhumi
6 Mar
BKK11:25Bangkok Suvarnabhumi
38h 10m
1 stop
LHR18:35London Heathrow
£440
Find similar
China Southern
23 Jan
LHR21:30London Heathrow
30h 25m
2 stops
BKK10:55Bangkok Suvarnabhumi
31 Jan
BKK02:50Bangkok Suvarnabhumi
18h 10m
1 stop
LHR14:00London Heathrow
£444
Find similar
China Southern
27 Jan
LGW20:20London Gatwick
22h 30m
1 stop
BKK01:50Bangkok Suvarnabhumi
5 Feb
BKK02:40Bangkok Suvarnabhumi
45h 40m
2 stops
LGW17:20London Gatwick
£448
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from United Kingdom 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, momondo users made 279,928 searches. Data last updated 18 December 2025.
Use the filters below to find and compare flights from the United Kingdom to Southeast Asia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Thu 5/2

17:40-18:05

1 stop17h 25m

Bangkok Suvarnabhumi

Mon 2/3

01:30-17:50

1 stop23h 20m

£440

LondonBangkok

STN - BKK

STNBKK

London Stansted

Thu 26/2

06:10-14:30

2 stops25h 20m

Bangkok Suvarnabhumi

Thu 5/3

14:30-22:15

3 stops38h 45m

£440

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Wed 7/1

17:15-01:40

2 stops25h 25m

Bangkok Suvarnabhumi

Fri 6/3

11:25-18:35

1 stop38h 10m

£440

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Sun 25/1

10:30-15:40

2 stops22h 10m

Bangkok Suvarnabhumi

Wed 4/2

10:40-14:00

2 stops34h 20m

£440

LondonBangkok

STN - BKK

STNBKK

London Stansted

Fri 16/1

08:20-01:05

3 stops33h 45m

Bangkok Suvarnabhumi

Fri 30/1

22:05-23:10

2 stops32h 05m

£440

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Sat 2/5

22:15-16:05

Nonstop11h 50m

Bangkok Suvarnabhumi

Sun 24/5

22:35-05:55

Nonstop13h 20m

£441

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Thu 30/4

22:15-16:05

Nonstop11h 50m

Bangkok Suvarnabhumi

Sun 3/5

22:35-05:55

Nonstop13h 20m

£442

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Wed 11/3

22:00-11:25

1 stop30h 25m

Bangkok Suvarnabhumi

Wed 25/3

02:10-17:55

2 stops22h 45m

£443

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Thu 16/4

22:10-00:10

1 stop20h 00m

Bangkok Suvarnabhumi

Wed 29/4

01:50-12:40

1 stop16h 50m

£443

LondonKuala Lumpur

LHR - KUL

LHRKUL

London Heathrow

Thu 29/1

08:50-19:35

1 stop26h 45m

Kuala Lumpur Intl

Sat 7/2

09:35-12:05

1 stop34h 30m

£494

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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See travel insights to Southeast Asia from

How to get the cheapest flight ticket from United Kingdom to Southeast Asia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Southeast Asia?

The month of May is, on average, the cheapest month to fly to Southeast Asia from United Kingdom, with most prices found around £396. If you are unable to visit Southeast Asia during the month of May, then departing from United Kingdom during the month September is also very affordable. Most momondo users find prices during this month for around £543.

What is the cheapest day to depart on your flight to Southeast Asia?

Our data shows that Tuesday is the least expensive day to fly to Southeast Asia. Tickets to fly out on this day can be as low as £712. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to Southeast Asia on Saturday is £754.

What is the cheapest time of day to depart on your flight to Southeast Asia?

At midday is the cheapest time of day to fly from United Kingdom to Southeast Asia when you can find flight prices for as low as £649. Flying to Southeast Asia at midday is an ideal time because this is during off-peak travel hours. Try not to purchase tickets in the evening because they tend to be around £739. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest United Kingdom to Southeast Asia flight route?

Fly from Manchester to Bangkok Suvarnabhumi for the best United Kingdom - Southeast Asia flight prices

How far in advance should I book a flight to Southeast Asia?

You are more likely to see cheaper flights to Southeast Asia from United Kingdom when booking weeks ahead of your departure date. In general, you can expect to find flights to Southeast Asia for around £703 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Southeast Asia from United Kingdom for as low as £655 on momondo.

What cabin class options are available on United Kingdom to Southeast Asia flights?

There are 4 cabin classes available to choose from on United Kingdom to Southeast Asia flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on United Kingdom to Southeast Asia flights?

No. A direct flight is the cheapest option for a flight between United Kingdom to Southeast Asia.

Cheap United Kingdom to Southeast Asia flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from United Kingdom to Southeast Asia

Fastest flight time

11h 15m

Direct flights

Mon, Tue, Wed, Thu, Sat and Sun

Airports in Southeast Asia

295 airports
The fastest flight from United Kingdom to Southeast Asia takes 11h 15m
Direct flights go from United Kingdom to Southeast Asia on Monday, Tuesday, Wednesday, Thursday, Saturday and Sunday. There are no airlines offering direct flights..
There are 295 airports in Southeast Asia. From United Kingdom there are direct flights to Bangkok Suvarnabhumi (BKK).
Search flight deals

  • When did momondo last update prices for flights from United Kingdom to Southeast Asia?

    Prices for flights from United Kingdom to Southeast Asia were last updated today.

  • How many operators does momondo search for flights from United Kingdom to Southeast Asia?

  • How old do you have to be to fly from United Kingdom to Southeast Asia?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from United Kingdom to Southeast Asia.

  • What documentation or ID do you need to fly to Southeast Asia?

    The travel and health documents you'll need for your trip to Southeast Asia may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Southeast Asia. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from United Kingdom to Southeast Asia?

Best airlines flying from United Kingdom to Southeast Asia

Compare and see reviews for airlines that fly from United Kingdom to Southeast Asia with momondo
Airline
Rating
Free Cancellation
Price
Turkmenistan AirlinesPriceFrom £291Free CancellationRating
0.0
0 reviews
Search Turkmenistan Airlines flights
Norse Atlantic UKPriceFrom £299Free CancellationRating
7.2
51 reviews
Search Norse Atlantic UK flights
A.P.G.PriceFrom £383Free CancellationRating
0.0
Search A.P.G. flights
Royal Brunei AirlinesPriceFrom £429Free CancellationRating
0.0
0 reviews
Search Royal Brunei Airlines flights
Juneyao AirlinesPriceFrom £430Free CancellationRating
0.0
0 reviews
Search Juneyao Airlines flights
Hahn AirPriceFrom £435Free CancellationRating
0.0
Search Hahn Air flights
Austrian AirlinesPriceFrom £441Free CancellationRating
7.6
879 reviews
Search Austrian Airlines flights
TUI AirwaysPriceFrom £484Free CancellationRating
0.0
0 reviews
Search TUI Airways flights
Royal JordanianPriceFrom £502Free CancellationRating
6.8
443 reviews
Search Royal Jordanian flights
Scandinavian AirlinesPriceFrom £507Free CancellationRating
7.4
1,606 reviews
Search Scandinavian Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from United Kingdom to Southeast Asia?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from United Kingdom to Southeast Asia. momondo saves you time and could save you money on your trip.

Can I find flights from United Kingdom to Southeast Asia with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for United Kingdom to Southeast Asia flights to just show those with flexible booking policies.

How can momondo help me find flights from United Kingdom to Southeast Asia?

momondo provides multiple filters to help you find the best flight to Southeast Asia from United Kingdom. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from United Kingdom to Southeast Asia right now. Can momondo alert me if prices change?

If you are not ready to book a flight from United Kingdom to Southeast Asia now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Southeast Asia and let you know when they change.

An easier way to manage your Southeast Asia trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
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