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Cheap flights from the United Kingdom to Southeast Asia from £181

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 18/9. 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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Find the cheapest flights from the United Kingdom to Southeast Asia

Recent return flight deals from the United Kingdom to Southeast Asia

Shenzhen Airlines Logo
22:05 - 11:10LHR-BKK
31h 05m1 stop
Shenzhen Airlines Logo
03:15 - 19:50BKK-LHR
22h 35m1 stop
£330Shenzhen Airlines
Find Deal
Sun, 21 Sep - Sun, 28 Sep
Shenzhen Airlines Logo
22:05 - 11:10LHR-BKK
31h 05m1 stop
Shenzhen Airlines Logo
12:10 - 20:00BKK-LHR
37h 50m1 stop
£332Shenzhen Airlines
Find Deal
Mon, 1 Sep - Thu, 23 Oct
China Southern Logo
12:00 - 10:20LGW-BKK
16h 20m1 stop
China Southern Logo
20:20 - 07:10BKK-LGW
16h 50m1 stop
£412China Southern
Find Deal
Fri, 5 Sep - Thu, 16 Oct
Air China Logo
11:40 - 16:15LGW-SIN
20h 35m1 stop
Air China Logo
17:50 - 06:55SIN-LGW
21h 05m1 stop
£412Air China
Find Deal
Tue, 11 Nov - Thu, 4 Dec
Air China Logo
11:40 - 16:15LGW-SIN
20h 35m1 stop
Air China Logo
17:50 - 06:55SIN-LGW
21h 05m1 stop
£414Air China
Find Deal
Wed, 19 Nov - Thu, 27 Nov
Etihad Airways Logo
21:45 - 09:40LHR-SIN
28h 55m1 stop
Etihad Airways Logo
21:10 - 15:15SIN-LHR
25h 05m1 stop
£430Etihad Airways
Find Deal
Wed, 27 Aug - Thu, 25 Sep
Etihad Airways Logo
21:45 - 09:40LHR-SIN
28h 55m1 stop
Etihad Airways Logo
21:10 - 07:00SIN-LHR
16h 50m1 stop
£431Etihad Airways
Find Deal
Tue, 16 Sep - Mon, 22 Sep
China Southern Logo
21:00 - 10:35LHR-MNL
30h 35m2 stops
China Southern Logo
17:55 - 18:15MNL-LHR
32h 20m1 stop
£455China Southern
Find Deal
Thu, 2 Oct - Sun, 26 Oct
SAUDIA Logo
14:00 - 00:35LGW-KUL
26h 35m1 stop
SAUDIA Logo
17:35 - 12:00KUL-LGW
26h 25m1 stop
£470SAUDIA
Find Deal
Sat, 8 Nov - Sat, 22 Nov
SAUDIA Logo
14:00 - 00:35LGW-KUL
26h 35m1 stop
SAUDIA Logo
17:35 - 12:00KUL-LGW
26h 25m1 stop
£478SAUDIA
Find Deal
Sat, 8 Nov - Sat, 22 Nov

KLM flights from United Kingdom to Southeast Asia

Our best KLM deals on United Kingdom to Southeast Asia flight tickets
KLM
30 Aug
LCY10:00London City
17h 30m
1 stop
BKK09:30Bangkok Suvarnabhumi
24 Sept
BKK12:05Bangkok Suvarnabhumi
27h 25m
1 stop
LCY09:30London City
£514
Find similar
KLM
22 Aug
LCY10:00London City
17h 30m
1 stop
BKK09:30Bangkok Suvarnabhumi
22 Oct
BKK12:05Bangkok Suvarnabhumi
25h 10m
1 stop
LCY07:15London City
£527
Find similar
KLM
25 Aug
LCY11:05London City
16h 25m
1 stop
BKK09:30Bangkok Suvarnabhumi
22 Oct
BKK12:05Bangkok Suvarnabhumi
25h 10m
1 stop
LCY07:15London City
£529
Find similar

Shenzhen Airlines flights from United Kingdom to Southeast Asia

Our best Shenzhen Airlines deals on United Kingdom to Southeast Asia flight tickets
Shenzhen Airlines
21 Sept
LHR22:05London Heathrow
31h 05m
1 stop
BKK11:10Bangkok Suvarnabhumi
28 Sept
BKK03:15Bangkok Suvarnabhumi
22h 35m
1 stop
LHR19:50London Heathrow
£330
Find similar
Shenzhen Airlines
1 Sept
LHR22:05London Heathrow
31h 05m
1 stop
BKK11:10Bangkok Suvarnabhumi
23 Oct
BKK12:10Bangkok Suvarnabhumi
37h 50m
1 stop
LHR20:00London Heathrow
£332
Find similar
Shenzhen Airlines
12 Sept
LHR22:05London Heathrow
38h 10m
1 stop
KUL19:15Kuala Lumpur Intl
28 Sept
KUL20:30Kuala Lumpur Intl
30h 20m
1 stop
LHR19:50London Heathrow
£333
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 5 August 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

Sun 21/9

22:05-11:10

1 stop31h 05m

Bangkok Suvarnabhumi

Sun 28/9

03:15-19:50

1 stop22h 35m

£330

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Mon 1/9

22:05-11:10

1 stop31h 05m

Bangkok Suvarnabhumi

Thu 23/10

12:10-20:00

1 stop37h 50m

£332

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Fri 5/9

12:00-10:20

1 stop16h 20m

Bangkok Suvarnabhumi

Thu 16/10

20:20-07:10

1 stop16h 50m

£412

LondonSingapore

LGW - SIN

LGWSIN

London Gatwick

Tue 11/11

11:40-16:15

1 stop20h 35m

Singapore Changi

Thu 4/12

17:50-06:55

1 stop21h 05m

£412

LondonSingapore

LGW - SIN

LGWSIN

London Gatwick

Wed 19/11

11:40-16:15

1 stop20h 35m

Singapore Changi

Thu 27/11

17:50-06:55

1 stop21h 05m

£414

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Wed 27/8

21:45-09:40

1 stop28h 55m

Singapore Changi

Thu 25/9

21:10-15:15

1 stop25h 05m

£430

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Tue 16/9

21:45-09:40

1 stop28h 55m

Singapore Changi

Mon 22/9

21:10-07:00

1 stop16h 50m

£431

LondonManila

LHR - MNL

LHRMNL

London Heathrow

Thu 2/10

21:00-10:35

2 stops30h 35m

Manila Ninoy Aquino Intl

Sun 26/10

17:55-18:15

1 stop32h 20m

£455

LondonKuala Lumpur

LGW - KUL

LGWKUL

London Gatwick

Sat 8/11

14:00-00:35

1 stop26h 35m

Kuala Lumpur Intl

Sat 22/11

17:35-12:00

1 stop26h 25m

£470

LondonKuala Lumpur

LGW - KUL

LGWKUL

London Gatwick

Sat 8/11

14:00-00:35

1 stop26h 35m

Kuala Lumpur Intl

Sat 22/11

17:35-12:00

1 stop26h 25m

£478

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 £409. 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 £554.

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 £743. 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 £793.

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 £653. 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 £769. 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 £711 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 £656 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

Best price found

£181

Fastest flight time

11h 25m

Direct flights

Mon, Wed and Thu

Airports in Southeast Asia

4 airports
The best one-way flight to Southeast Asia from United Kingdom in the past 72 hours is £181. The best return flight deal from United Kingdom to Southeast Asia found on momondo in the last 72 hours is £330.
The fastest flight from United Kingdom to Southeast Asia takes 11h 25m
Direct flights go from United Kingdom to Southeast Asia on Monday, Wednesday and Thursday. Airlines offering direct flights are: A.P.G. and Norse Atlantic UK..
There are 4 airports near Southeast Asia: Bangkok Suvarnabhumi (BKK), Kuala Lumpur Intl (KUL), Singapore Changi (SIN), Manila Ninoy Aquino Intl (MNL)
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
Norse Atlantic UKPriceFrom £278Free CancellationRating
7.2
47 reviews
Search Norse Atlantic UK flights
Turkmenistan AirlinesPriceFrom £294Free CancellationRating
10.0
2 reviews
Search Turkmenistan Airlines flights
IndiGoPriceFrom £401Free CancellationRating
6.8
479 reviews
Search IndiGo flights
Royal Brunei AirlinesPriceFrom £432Free CancellationRating
5.7
7 reviews
Search Royal Brunei Airlines flights
TUI AirwaysPriceFrom £448Free CancellationRating
6.2
16 reviews
Search TUI Airways flights
Royal JordanianPriceFrom £480Free CancellationRating
6.8
417 reviews
Search Royal Jordanian flights
Austrian AirlinesPriceFrom £498Free CancellationRating
7.6
823 reviews
Search Austrian Airlines flights
A.P.G.PriceFrom £510Free CancellationRating
0.0
Search A.P.G. flights
Scandinavian AirlinesPriceFrom £511Free CancellationRating
7.3
1,461 reviews
Search Scandinavian Airlines flights
China AirlinesPriceFrom £569Free CancellationRating
8.3
757 reviews
Search China 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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