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Cheap flights from London to Southeast Asia from €331

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London to Southeast Asia departing on 24/1. 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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Find the cheapest flights from London to Southeast Asia

Cheap return flights

Enter your travel dates to find the best prices.
Air India Logo
08:45 - 07:50
LHR
-
BKK
16h 05m
1 stop
Air India Logo
20:50 - 11:05
BKK
-
LHR
21h 15m
1 stop
€470Air India
Thu, 19 Feb - Wed, 11 Mar
Air India Logo
20:30 - 19:35
LHR
-
BKK
16h 05m
1 stop
Air India Logo
20:50 - 11:05
BKK
-
LHR
21h 15m
1 stop
€471Air India
Tue, 10 Mar - Mon, 23 Mar
China Eastern Logo
21:00 - 00:55
LHR
-
BKK
20h 55m
1 stop
China Eastern Logo
05:05 - 18:40
BKK
-
LHR
19h 35m
1 stop
€479China Eastern
Fri, 30 Jan - Sat, 4 Apr
China Eastern Logo
21:00 - 22:25
LHR
-
BKK
18h 25m
1 stop
China Eastern Logo
05:05 - 18:40
BKK
-
LHR
19h 35m
1 stop
€480China Eastern
Mon, 2 Feb - Wed, 1 Apr
Gulf Air Logo
11:25 - 12:20
LGW
-
SIN
17h 55m
1 stop
Gulf Air Logo
20:00 - 06:55
SIN
-
LGW
17h 55m
1 stop
€557Gulf Air
Wed, 15 Apr - Thu, 23 Apr
Gulf Air Logo
11:25 - 12:20
LGW
-
SIN
17h 55m
1 stop
Gulf Air Logo
20:00 - 06:55
SIN
-
LGW
17h 55m
1 stop
€558Gulf Air
Wed, 22 Apr - Thu, 30 Apr
SWISS Logo
18:35 - 17:10
LGW
-
SIN
15h 35m
1 stop
SWISS Logo
23:25 - 08:20
SIN
-
LGW
15h 55m
1 stop
€572SWISS
Thu, 7 May - Tue, 19 May
Multiple Airlines Logo
06:25 - 03:20
LGW
-
SIN
36h 55m
1 stop
Multiple Airlines Logo
03:15 - 12:35
SIN
-
LGW
17h 20m
1 stop
€577Multiple Airlines
Sun, 8 Mar - Sat, 21 Mar
Multiple Airlines Logo
07:25 - 01:10
LGW
-
SIN
34h 45m
1 stop
Multiple Airlines Logo
10:25 - 22:25
SIN
-
LGW
19h 00m
1 stop
€578Multiple Airlines
Sun, 3 May - Sun, 17 May
SWISS Logo
18:35 - 00:10
LGW
-
DPS
22h 35m
2 stops
SWISS Logo
13:15 - 08:20
DPS
-
LGW
26h 05m
2 stops
€588SWISS
Wed, 3 Jun - Tue, 9 Jun

China Eastern flights from London to Southeast Asia

Our best China Eastern deals on London to Southeast Asia flight tickets
China Eastern
30 Jan
LHR21:00London Heathrow
20h 55m
1 stop
BKK00:55Bangkok Suvarnabhumi
4 Apr
BKK05:05Bangkok Suvarnabhumi
19h 35m
1 stop
LHR18:40London Heathrow
€479
China Eastern
2 Feb
LHR21:00London Heathrow
18h 25m
1 stop
BKK22:25Bangkok Suvarnabhumi
1 Apr
BKK05:05Bangkok Suvarnabhumi
19h 35m
1 stop
LHR18:40London Heathrow
€480
China Eastern
18 Feb
LHR21:00London Heathrow
18h 25m
1 stop
BKK22:25Bangkok Suvarnabhumi
6 Mar
BKK05:45Bangkok Suvarnabhumi
18h 45m
1 stop
LHR17:30London Heathrow
€481

Oman Air flights from London to Southeast Asia

Our best Oman Air deals on London to Southeast Asia flight tickets
Oman Air
1 Feb
LHR08:25London Heathrow
15h 20m
1 stop
BKK06:45Bangkok Suvarnabhumi
26 Feb
BKK20:05Bangkok Suvarnabhumi
16h 50m
1 stop
LHR05:55London Heathrow
€567
Oman Air
25 Jan
LHR08:25London Heathrow
15h 20m
1 stop
BKK06:45Bangkok Suvarnabhumi
24 Feb
BKK20:05Bangkok Suvarnabhumi
29h 20m
1 stop
LHR18:25London Heathrow
€591
Oman Air
24 Jan
LHR20:05London Heathrow
27h 40m
1 stop
BKK06:45Bangkok Suvarnabhumi
12 Feb
BKK20:05Bangkok Suvarnabhumi
16h 50m
1 stop
LHR05:55London Heathrow
€591

momondo Fare Finder

 
Customise your flight search to find flights from London 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 13,528 searches. Data last updated 18 January 2026.
Use the filters below to find and compare flights from London to Southeast Asia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Thu 19/2

08:45-07:50

1 stop16h 05m

Bangkok Suvarnabhumi

Wed 11/3

20:50-11:05

1 stop21h 15m

€470

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Tue 10/3

20:30-19:35

1 stop16h 05m

Bangkok Suvarnabhumi

Mon 23/3

20:50-11:05

1 stop21h 15m

€471

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Fri 30/1

21:00-00:55

1 stop20h 55m

Bangkok Suvarnabhumi

Sat 4/4

05:05-18:40

1 stop19h 35m

€479

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Mon 2/2

21:00-22:25

1 stop18h 25m

Bangkok Suvarnabhumi

Wed 1/4

05:05-18:40

1 stop19h 35m

€480

LondonSingapore

LGW - SIN

LGWSIN

London Gatwick

Wed 15/4

11:25-12:20

1 stop17h 55m

Singapore Changi

Thu 23/4

20:00-06:55

1 stop17h 55m

€557

LondonSingapore

LGW - SIN

LGWSIN

London Gatwick

Wed 22/4

11:25-12:20

1 stop17h 55m

Singapore Changi

Thu 30/4

20:00-06:55

1 stop17h 55m

€558

LondonSingapore

LGW - SIN

LGWSIN

London Gatwick

Thu 7/5

18:35-17:10

1 stop15h 35m

Singapore Changi

Tue 19/5

23:25-08:20

1 stop15h 55m

€572

LondonSingapore

LGW - SIN

LGWSIN

London Gatwick

Sun 8/3

06:25-03:20

1 stop36h 55m

Singapore Changi

Sat 21/3

03:15-12:35

1 stop17h 20m

€577

LondonSingapore

LGW - SIN

LGWSIN

London Gatwick

Sun 3/5

07:25-01:10

1 stop34h 45m

Singapore Changi

Sun 17/5

10:25-22:25

1 stop19h 00m

€578

LondonDenpasar

LGW - DPS

LGWDPS

London Gatwick

Wed 3/6

18:35-00:10

2 stops22h 35m

Denpasar Bali Ngurah Rai

Tue 9/6

13:15-08:20

2 stops26h 05m

€588

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 London 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 cheapest month to fly to Southeast Asia from London is in May. Flight prices, which tend to average around €452, are often lower during this time because this is during the off-season. If you’re not able to fly to Southeast Asia in May, then September is your next best option. Flight prices from London to Southeast Asia during September average around €626.

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

The cheapest day to depart from London to Southeast Asia is on a Wednesday. Travellers who choose to depart for Southeast Asia on a Wednesday will often find tickets for as low as €795. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around €1,149. These prices are subject to change though, so be sure to set up a Price Alert for flights to Southeast Asia.

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

Our most recent data shows that the best time of day to fly to Southeast Asia is in the evening. Flights from London to Southeast Asia during this time can be as low as €840. Flights to Southeast Asia are more costly in the morning, with an average ticket price of €841. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest London to Southeast Asia flight route?

Fly from London Gatwick to Singapore Changi for the best London - 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 London when booking weeks ahead of your departure date. In general, you can expect to find flights to Southeast Asia for around €807 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 London for as low as €754 on momondo.

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

There are 3 cabin classes available to choose from on London 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 London to Southeast Asia flights?

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

Cheap London to Southeast Asia flight deals and tips

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

Fastest flight time

11h 40m

Direct flights

Every day

Airports in Southeast Asia

295 airports
The fastest flight from London to Southeast Asia takes 11h 40m
Direct flights go from London to Southeast Asia every day.
There are 295 airports in Southeast Asia. From London there are direct flights to Bangkok Suvarnabhumi (BKK).
Search flight deals

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

    Prices for flights from London to Southeast Asia refresh daily.

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London 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 licence 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 London to Southeast Asia?

Best airlines flying from London to Southeast Asia

Compare and see reviews for airlines that fly from London to Southeast Asia with momondo
Airline
Rating
Free Cancellation
Price
Air ChinaPriceFrom €446Free CancellationRating
7.2
138 reviews
Search Air China flights

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from London to Southeast Asia . Millions of users trust and use momondo every year so you are in good hands.

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

All flight searches from London to Southeast Asia on momondo can be filtered to show those which offer flexible booking policies.

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

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

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

Yes. momondo can track prices for London to Southeast Asia flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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Find better results for your trip to Southeast Asia

Popular Cities in Southeast Asia

Popular flights according to clicks in the last 7 days on momondo
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