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Cheap flights from London Heathrow Airport to Southeast Asia from $591

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 27/1. 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.
China Southern Logo
22:00 - 01:05
LHR
-
BKK
20h 05m1 stop
China Southern Logo
19:55 - 14:00
BKK
-
LHR
49h 05m2 stops
$938China Southern
Fri, 23 Jan - Fri, 30 Jan
Multiple Airlines Logo
18:40 - 17:05
LHR
-
SIN
15h 25m1 stop
Multiple Airlines Logo
23:40 - 08:40
SIN
-
LHR
16h 00m1 stop
$951Multiple Airlines
Tue, 14 Apr - Tue, 5 May
Shenzhen Airlines Logo
21:10 - 18:30
LHR
-
BKK
38h 20m1 stop
Shenzhen Airlines Logo
19:30 - 19:10
BKK
-
LHR
30h 40m1 stop
$967Shenzhen Airlines
Fri, 6 Feb - Thu, 5 Mar
Shenzhen Airlines Logo
21:10 - 02:15
LHR
-
BKK
22h 05m1 stop
Shenzhen Airlines Logo
03:15 - 20:00
BKK
-
LHR
22h 45m1 stop
$969Shenzhen Airlines
Fri, 27 Feb - Thu, 2 Apr
SWISS Logo
14:25 - 18:00
LHR
-
SIN
19h 35m2 stops
SWISS Logo
00:05 - 08:05
SIN
-
LHR
16h 00m1 stop
$976SWISS
Tue, 3 Mar - Mon, 9 Mar
SWISS Logo
14:25 - 18:00
LHR
-
SIN
19h 35m2 stops
SWISS Logo
00:05 - 11:15
SIN
-
LHR
19h 10m1 stop
$978SWISS
Tue, 3 Mar - Mon, 9 Mar
Air India Logo
22:00 - 08:35
LHR
-
DPS
26h 35m1 stop
Air India Logo
15:10 - 19:20
DPS
-
LHR
36h 10m1 stop
$982Air India
Thu, 5 Mar - Mon, 23 Mar
Air India Logo
21:05 - 08:35
LHR
-
DPS
27h 30m1 stop
Air India Logo
15:10 - 20:30
DPS
-
LHR
37h 20m1 stop
$984Air India
Thu, 5 Mar - Mon, 23 Mar
Etihad Airways Logo
19:20 - 19:35
LHR
-
KUL
16h 15m1 stop
Etihad Airways Logo
09:35 - 18:10
KUL
-
LHR
16h 35m1 stop
$1,050Etihad Airways
Tue, 10 Mar - Thu, 19 Mar
Etihad Airways Logo
13:55 - 19:35
LHR
-
KUL
21h 40m1 stop
Etihad Airways Logo
09:35 - 15:15
KUL
-
LHR
36h 40m1 stop
$1,056Etihad Airways
Tue, 3 Mar - Thu, 14 May

China Southern flights from London Heathrow Airport to Southeast Asia

Our best China Southern deals on London Heathrow Airport to Southeast Asia flight tickets
China Southern
23 Jan
LHR22:00London Heathrow
20h 05m
1 stop
BKK01:05Bangkok Suvarnabhumi
30 Jan
BKK19:55Bangkok Suvarnabhumi
49h 05m
2 stops
LHR14:00London Heathrow
$938
Find similar
China Southern
25 Jan
LHR17:15London Heathrow
46h 10m
2 stops
DPS23:25Denpasar Bali Ngurah Rai
1 Feb
DPS08:35Denpasar Bali Ngurah Rai
40h 25m
1 stop
LHR17:00London Heathrow
$1,002
Find similar
China Southern
23 Jan
LHR22:00London Heathrow
25h 35m
1 stop
DPS07:35Denpasar Bali Ngurah Rai
30 Jan
DPS08:35Denpasar Bali Ngurah Rai
42h 00m
1 stop
LHR18:35London Heathrow
$1,021
Find similar

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
6 Feb
LHR21:10London Heathrow
38h 20m
1 stop
BKK18:30Bangkok Suvarnabhumi
5 Mar
BKK12:10Bangkok Suvarnabhumi
38h 00m
1 stop
LHR19:10London Heathrow
$967
Find similar
Shenzhen Airlines
27 Feb
LHR21:10London Heathrow
31h 00m
1 stop
BKK11:10Bangkok Suvarnabhumi
28 Mar
BKK03:15Bangkok Suvarnabhumi
22h 45m
1 stop
LHR19:00London Heathrow
$969
Find similar
Shenzhen Airlines
25 Feb
LHR21:10London Heathrow
38h 20m
1 stop
BKK18:30Bangkok Suvarnabhumi
5 Apr
BKK03:15Bangkok Suvarnabhumi
22h 35m
1 stop
LHR19:50London Heathrow
$970
Find similar

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 11 December 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

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Fri 23/1

22:00-01:05

1 stop20h 05m

Bangkok Suvarnabhumi

Fri 30/1

19:55-14:00

2 stops49h 05m

$938

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Tue 14/4

18:40-17:05

1 stop15h 25m

Singapore Changi

Tue 5/5

23:40-08:40

1 stop16h 00m

$951

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Fri 6/2

21:10-18:30

1 stop38h 20m

Bangkok Suvarnabhumi

Thu 5/3

19:30-19:10

1 stop30h 40m

$967

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Fri 27/2

21:10-02:15

1 stop22h 05m

Bangkok Suvarnabhumi

Thu 2/4

03:15-20:00

1 stop22h 45m

$969

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Tue 3/3

14:25-18:00

2 stops19h 35m

Singapore Changi

Mon 9/3

00:05-08:05

1 stop16h 00m

$976

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Tue 3/3

14:25-18:00

2 stops19h 35m

Singapore Changi

Mon 9/3

00:05-11:15

1 stop19h 10m

$978

LondonDenpasar

LHR - DPS

LHRDPS

London Heathrow

Thu 5/3

22:00-08:35

1 stop26h 35m

Denpasar Bali Ngurah Rai

Mon 23/3

15:10-19:20

1 stop36h 10m

$982

LondonDenpasar

LHR - DPS

LHRDPS

London Heathrow

Thu 5/3

21:05-08:35

1 stop27h 30m

Denpasar Bali Ngurah Rai

Mon 23/3

15:10-20:30

1 stop37h 20m

$984

LondonKuala Lumpur

LHR - KUL

LHRKUL

London Heathrow

Tue 10/3

19:20-19:35

1 stop16h 15m

Kuala Lumpur Intl

Thu 19/3

09:35-18:10

1 stop16h 35m

$1,050

LondonKuala Lumpur

LHR - KUL

LHRKUL

London Heathrow

Tue 3/3

13:55-19:35

1 stop21h 40m

Kuala Lumpur Intl

Thu 14/5

09:35-15:15

1 stop36h 40m

$1,056

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 $1,352, 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 $1,415.

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 $1,406. 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 $2,107.

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 $1,463. 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 $1,656.

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

Fly from London Heathrow to Singapore Changi 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 $1,619 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 $1,478 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 55m

Direct flights

Every day

Airports in Southeast Asia

295 airports
The fastest flight from London Heathrow Airport to Southeast Asia takes 11h 55m
Direct flights go from London Heathrow Airport to Southeast Asia every day.
There are 295 airports in Southeast Asia. From London Heathrow Airport there are direct flights to Bangkok Suvarnabhumi (BKK).
Search flight deals

  • 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 $1,059Free cancellationRating
7.4
1,331 reviews
Search Etihad Airways flights
Thai AirwaysPriceFrom $1,162Free cancellationRating
7.8
366 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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