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Cheap flights from London Heathrow Airport to Southeast Asia from $614

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 Heathrow Airport to Southeast Asia departing on 14/1. 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 Heathrow Airport to Southeast Asia

Cheap return flights

Enter your travel dates to find the best prices.
Etihad Airways Logo
13:55 - 09:35LHR-SIN
35h 40m1 stop
Etihad Airways Logo
19:25 - 06:40SIN-LHR
19h 15m1 stop
$926Etihad Airways
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Wed, 12 Nov - Sun, 16 Nov
Etihad Airways Logo
20:55 - 09:35LHR-SIN
28h 40m1 stop
Etihad Airways Logo
19:25 - 12:05SIN-LHR
24h 40m1 stop
$927Etihad Airways
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Mon, 10 Nov - Fri, 14 Nov
Gulf Air Logo
21:50 - 12:30LHR-SIN
30h 40m1 stop
Gulf Air Logo
20:25 - 14:45SIN-LHR
26h 20m1 stop
$930Gulf Air
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Thu, 4 Dec - Mon, 8 Dec
Air China Logo
20:25 - 00:10LHR-BKK
20h 45m1 stop
Air China Logo
01:30 - 15:55BKK-LHR
21h 25m1 stop
$930Air China
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Thu, 4 Dec - Wed, 24 Dec
SWISS Logo
17:10 - 18:00LHR-SIN
16h 50m1 stop
SWISS Logo
00:05 - 08:05SIN-LHR
16h 00m1 stop
$932SWISS
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Tue, 2 Dec - Wed, 10 Dec
Multiple Airlines Logo
18:40 - 18:00LHR-SIN
15h 20m1 stop
Multiple Airlines Logo
23:55 - 10:45SIN-LHR
18h 50m1 stop
$933Multiple Airlines
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Wed, 18 Mar - Mon, 23 Mar
Multiple Airlines Logo
18:40 - 18:00LHR-SIN
15h 20m1 stop
Multiple Airlines Logo
23:55 - 10:45SIN-LHR
18h 50m1 stop
$938Multiple Airlines
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Fri, 5 Dec - Sun, 14 Dec
Etihad Airways Logo
08:50 - 09:35LHR-SIN
16h 45m1 stop
Etihad Airways Logo
19:25 - 06:40SIN-LHR
19h 15m1 stop
$940Etihad Airways
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Sun, 16 Nov - Fri, 28 Nov
SWISS Logo
18:40 - 18:00LHR-SIN
15h 20m1 stop
SWISS Logo
00:05 - 13:40SIN-LHR
21h 35m2 stops
$981SWISS
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Thu, 4 Dec - Sun, 7 Dec
Gulf Air Logo
21:50 - 12:30LHR-SIN
30h 40m1 stop
Gulf Air Logo
20:00 - 06:55SIN-LHR
17h 55m1 stop
$1,020Gulf Air
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Mon, 1 Dec - Mon, 4 May

Shenzhen Airlines flights from London Heathrow Airport to Southeast Asia

Our best Shenzhen Airlines deals on London Heathrow Airport to Southeast Asia flight tickets
Shenzhen Airlines
14 Nov
LHR21:10London Heathrow
31h 00m
1 stop
BKK11:10Bangkok Suvarnabhumi
29 Nov
BKK19:30Bangkok Suvarnabhumi
30h 40m
1 stop
LHR19:10London Heathrow
$950
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Shenzhen Airlines
14 Nov
LHR21:10London Heathrow
31h 00m
1 stop
BKK11:10Bangkok Suvarnabhumi
25 Nov
BKK03:15Bangkok Suvarnabhumi
22h 55m
1 stop
LHR19:10London Heathrow
$953
Find similar
Shenzhen Airlines
8 Nov
LHR21:10London Heathrow
31h 00m
1 stop
BKK11:10Bangkok Suvarnabhumi
20 Nov
BKK19:30Bangkok Suvarnabhumi
30h 40m
1 stop
LHR19:10London Heathrow
$959
Find similar

Scandinavian Airlines flights from London Heathrow Airport to Southeast Asia

Our best Scandinavian Airlines deals on London Heathrow Airport to Southeast Asia flight tickets
Scandinavian Airlines
22 Nov
LHR10:35London Heathrow
22h 45m
2 stops
BKK16:20Bangkok Suvarnabhumi
7 Dec
BKK22:50Bangkok Suvarnabhumi
25h 50m
1 stop
LHR17:40London Heathrow
$1,093
Find similar
Scandinavian Airlines
22 Nov
LHR10:35London Heathrow
22h 45m
2 stops
BKK16:20Bangkok Suvarnabhumi
14 Dec
BKK22:50Bangkok Suvarnabhumi
25h 50m
1 stop
LHR17:40London Heathrow
$1,101
Find similar
Scandinavian Airlines
6 Nov
LHR21:05London Heathrow
30h 55m
2 stops
BKK11:00Bangkok Suvarnabhumi
20 Dec
BKK12:45Bangkok Suvarnabhumi
27h 50m
2 stops
LHR09:35London Heathrow
$1,247
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momondo Fare Finder

 
Customise your flight search to find flights from London Heathrow Airport 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 78,305 searches. Data last updated 31 October 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Southeast Asia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Wed 12/11

13:55-09:35

1 stop35h 40m

Singapore Changi

Sun 16/11

19:25-06:40

1 stop19h 15m

$926

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Mon 10/11

20:55-09:35

1 stop28h 40m

Singapore Changi

Fri 14/11

19:25-12:05

1 stop24h 40m

$927

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Thu 4/12

21:50-12:30

1 stop30h 40m

Singapore Changi

Mon 8/12

20:25-14:45

1 stop26h 20m

$930

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Thu 4/12

20:25-00:10

1 stop20h 45m

Bangkok Suvarnabhumi

Wed 24/12

01:30-15:55

1 stop21h 25m

$930

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Tue 2/12

17:10-18:00

1 stop16h 50m

Singapore Changi

Wed 10/12

00:05-08:05

1 stop16h 00m

$932

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Wed 18/3

18:40-18:00

1 stop15h 20m

Singapore Changi

Mon 23/3

23:55-10:45

1 stop18h 50m

$933

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Fri 5/12

18:40-18:00

1 stop15h 20m

Singapore Changi

Sun 14/12

23:55-10:45

1 stop18h 50m

$938

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Sun 16/11

08:50-09:35

1 stop16h 45m

Singapore Changi

Fri 28/11

19:25-06:40

1 stop19h 15m

$940

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Thu 4/12

18:40-18:00

1 stop15h 20m

Singapore Changi

Sun 7/12

00:05-13:40

2 stops21h 35m

$981

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Mon 1/12

21:50-12:30

1 stop30h 40m

Singapore Changi

Mon 4/5

20:00-06:55

1 stop17h 55m

$1,020

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 Heathrow Airport 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 Heathrow Airport is in November. Flight prices, which tend to average around $1,398, are often lower during this time because this is during the off-season. The month of February is another great option to travel to Southeast Asia, with average flight prices from London Heathrow Airport averaging around $1,441.

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 $1,423. On the other hand, Thursday is the most expensive day to depart from London Heathrow Airport because it is more convenient for both business and leisure travellers. As a result, prices tend to be around $2,134.

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

In the morning is the cheapest time of day to fly from London Heathrow Airport to Southeast Asia when you can find flight prices for as low as $1,481. Flying to Southeast Asia in the morning is an ideal time because this is during off-peak travel hours. Flights in the evening are often more expensive, with an average ticket price of $1,677.

What is the cheapest London Heathrow to Southeast Asia flight route?

Fly from London Heathrow to Bangkok Suvarnabhumi for the best London Heathrow - 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 Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Southeast Asia for around $1,659 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 Heathrow Airport for as low as $1,541 on momondo.

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

There are 4 cabin classes available to choose from on London Heathrow 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 Heathrow Airport to Southeast Asia flights?

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

Cheap London Heathrow Airport to Southeast Asia flight deals and tips

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

Fastest flight time

11h 25m

Direct flights

Every day

Airports in Southeast Asia

1 airport
The fastest flight from London Heathrow Airport to Southeast Asia takes 11h 25m
Direct flights go from London Heathrow Airport to Southeast Asia every day.
There is 1 airport near Southeast Asia: Bangkok Suvarnabhumi (BKK)
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  • When did momondo last update prices for flights from London Heathrow Airport to Southeast Asia?

    Prices for flights from London Heathrow Airport to Southeast Asia are updated daily.

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

  • How old do you have to be to fly from London Heathrow Airport 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 Heathrow Airport to Southeast Asia.

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

    The travel and health documents required for your trip to Southeast Asia can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Southeast Asia. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from London Heathrow Airport to Southeast Asia?

Best airlines flying from London Heathrow Airport to Southeast Asia

Compare and see reviews for airlines that fly from London Heathrow Airport to Southeast Asia with momondo
Airline
Rating
Free cancellation
Price
Etihad AirwaysPriceFrom $1,072Free cancellationRating
7.4
1,284 reviews
Search Etihad Airways flights
Thai AirwaysPriceFrom $1,176Free cancellationRating
7.8
361 reviews
Search Thai Airways flights

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Southeast Asia from London.

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

Yes. momondo enables you to select and highlight flights to Southeast Asia from London with this policy.

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?

Price alerts on flights to Southeast Asia from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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