Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from London Heathrow Airport to Southeast Asia from $352

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 2/20. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from London Heathrow Airport to Southeast Asia

Cheap round-trip flights

Enter your travel dates to find the best prices.
China Eastern Logo
9:00 pm - 4:45 am
LHR
-
BKK
24h 45m
1 stop
China Eastern Logo
5:45 am - 5:30 pm
BKK
-
LHR
18h 45m
1 stop
$547China Eastern
Tue, Feb 17 - Tue, Mar 10
Air China Logo
10:40 pm - 12:10 am
LHR
-
BKK
19h 30m
1 stop
Air China Logo
1:30 am - 8:25 pm
BKK
-
LHR
24h 55m
1 stop
$548Air China
Sun, May 10 - Sat, May 16
Air China Logo
10:40 pm - 12:10 am
LHR
-
BKK
19h 30m
1 stop
Air China Logo
7:35 pm - 8:25 pm
BKK
-
LHR
30h 50m
1 stop
$549Air China
Sun, May 10 - Sun, May 17
Air China Logo
10:40 pm - 12:10 am
LHR
-
BKK
19h 30m
1 stop
Air China Logo
1:30 am - 8:25 pm
BKK
-
LHR
24h 55m
1 stop
$554Air China
Tue, Apr 7 - Mon, May 11
China Southern Logo
10:00 pm - 3:05 pm
LHR
-
SGN
34h 05m
1 stop
China Southern Logo
1:10 pm - 6:35 pm
SGN
-
LHR
36h 25m
2 stops
$637China Southern
Wed, Mar 4 - Mon, Mar 16
Gulf Air Logo
9:30 am - 12:50 pm
LHR
-
SIN
19h 20m
1 stop
Gulf Air Logo
8:00 pm - 2:45 pm
SIN
-
LHR
26h 45m
1 stop
$668Gulf Air
Tue, Feb 24 - Tue, Mar 3
China Southern Logo
9:00 pm - 10:35 am
LHR
-
MNL
30h 35m
2 stops
China Southern Logo
5:45 pm - 7:00 pm
MNL
-
LHR
32h 15m
1 stop
$670China Southern
Sat, Apr 11 - Sat, May 9
Etihad Airways Logo
7:20 pm - 7:35 pm
LHR
-
KUL
16h 15m
1 stop
Etihad Airways Logo
9:35 am - 6:10 pm
KUL
-
LHR
16h 35m
1 stop
$698Etihad Airways
Sun, Mar 1 - Mon, Mar 9
Etihad Airways Logo
2:45 pm - 8:35 pm
LHR
-
CGK
23h 50m
1 stop
Etihad Airways Logo
12:45 am - 3:05 pm
CGK
-
LHR
20h 20m
1 stop
$758Etihad Airways
Sun, Jun 14 - Fri, Jun 26
Malaysia Airlines Logo
11:00 am - 3:05 pm
LHR
-
CGK
22h 05m
1 stop
Malaysia Airlines Logo
7:50 pm - 4:35 pm
CGK
-
LHR
26h 45m
1 stop
$762Malaysia Airlines
Sun, Jun 14 - Sat, Jun 27

Air China flights from London Heathrow Airport to Southeast Asia

Our best Air China deals on London Heathrow Airport to Southeast Asia flight tickets
Air China
May 10
LHR10:40 pmLondon Heathrow
19h 30m
1 stop
BKK12:10 amBangkok Suvarnabhumi
May 16
BKK1:30 amBangkok Suvarnabhumi
24h 55m
1 stop
LHR8:25 pmLondon Heathrow
$548
Air China
May 10
LHR10:40 pmLondon Heathrow
19h 30m
1 stop
BKK12:10 amBangkok Suvarnabhumi
May 17
BKK7:35 pmBangkok Suvarnabhumi
30h 50m
1 stop
LHR8:25 pmLondon Heathrow
$549
Air China
May 10
LHR8:25 pmLondon Heathrow
21h 45m
1 stop
BKK12:10 amBangkok Suvarnabhumi
May 17
BKK7:35 pmBangkok Suvarnabhumi
28h 05m
1 stop
LHR5:40 pmLondon Heathrow
$551

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
Feb 2
LHR9:10 pmLondon Heathrow
22h 05m
1 stop
BKK2:15 amBangkok Suvarnabhumi
Mar 10
BKK7:30 pmBangkok Suvarnabhumi
30h 40m
1 stop
LHR7:10 pmLondon Heathrow
$618
Shenzhen Airlines
Feb 2
LHR9:10 pmLondon Heathrow
22h 05m
1 stop
BKK2:15 amBangkok Suvarnabhumi
Mar 10
BKK7:30 pmBangkok Suvarnabhumi
30h 40m
1 stop
LHR7:10 pmLondon Heathrow
$621
Shenzhen Airlines
Mar 7
LHR9:10 pmLondon Heathrow
20h 50m
1 stop
SIN2:00 amSingapore Changi
Mar 15
SIN6:30 pmSingapore Changi
32h 40m
1 stop
LHR7:10 pmLondon Heathrow
$656

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated January 29, 2026.
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

Tue 2/17

9:00 pm-4:45 am

1 stop24h 45m

Bangkok Suvarnabhumi

Tue 3/10

5:45 am-5:30 pm

1 stop18h 45m

$547

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sun 5/10

10:40 pm-12:10 am

1 stop19h 30m

Bangkok Suvarnabhumi

Sat 5/16

1:30 am-8:25 pm

1 stop24h 55m

$548

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sun 5/10

10:40 pm-12:10 am

1 stop19h 30m

Bangkok Suvarnabhumi

Sun 5/17

7:35 pm-8:25 pm

1 stop30h 50m

$549

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Tue 4/7

10:40 pm-12:10 am

1 stop19h 30m

Bangkok Suvarnabhumi

Mon 5/11

1:30 am-8:25 pm

1 stop24h 55m

$554

LondonHo Chi Minh City

LHR - SGN

LHRSGN

London Heathrow

Wed 3/4

10:00 pm-3:05 pm

1 stop34h 05m

Ho Chi Minh City

Mon 3/16

1:10 pm-6:35 pm

2 stops36h 25m

$637

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Tue 2/24

9:30 am-12:50 pm

1 stop19h 20m

Singapore Changi

Tue 3/3

8:00 pm-2:45 pm

1 stop26h 45m

$668

LondonManila

LHR - MNL

LHRMNL

London Heathrow

Sat 4/11

9:00 pm-10:35 am

2 stops30h 35m

Manila Ninoy Aquino Intl

Sat 5/9

5:45 pm-7:00 pm

1 stop32h 15m

$670

LondonKuala Lumpur

LHR - KUL

LHRKUL

London Heathrow

Sun 3/1

7:20 pm-7:35 pm

1 stop16h 15m

Kuala Lumpur Intl

Mon 3/9

9:35 am-6:10 pm

1 stop16h 35m

$698

LondonJakarta

LHR - CGK

LHRCGK

London Heathrow

Sun 6/14

2:45 pm-8:35 pm

1 stop23h 50m

Jakarta Soekarno-Hatta Intl

Fri 6/26

12:45 am-3:05 pm

1 stop20h 20m

$758

LondonJakarta

LHR - CGK

LHRCGK

London Heathrow

Sun 6/14

11:00 am-3:05 pm

1 stop22h 05m

Jakarta Soekarno-Hatta Intl

Sat 6/27

7:50 pm-4:35 pm

1 stop26h 45m

$762

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 month of September is, on average, the cheapest month to fly to Southeast Asia from London Heathrow Airport, with most prices found around $815. If you don’t want to visit Southeast Asia in September, then you should wait until May to fly from London Heathrow Airport, when ticket prices are also cheap, with an average price of $820.

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

The cheapest day to depart from London Heathrow Airport to Southeast Asia is on a Monday when prices can be found for as low as $997. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $1,097. 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?

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 $1,002. Flying to Southeast Asia in the morning 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 $1,062. Of course, these prices can vary depending on the time of year and what airport you fly to.

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

Fly from London Heathrow to Ho Chi Minh City 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 $937 when searching weeks out. 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 $875 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 20m

Direct flights

Mon, Tue, Wed, Thu and Sat

Airports in Southeast Asia

295 airports
The fastest flight from London Heathrow Airport to Southeast Asia takes 11h 20m
Direct flights go from London Heathrow Airport to Southeast Asia on Monday, Tuesday, Wednesday, Thursday and Saturday. There are no airlines offering direct flights.
There are 295 airports in Southeast Asia. From London Heathrow Airport there are direct flights to Bangkok Suvarnabhumi (BKK), Hanoi Noibai (HAN).
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 were last updated today.

  • 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?

    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 London Heathrow Airport 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 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
SAUDIAPriceFrom $407Free CancellationRating
7.4
657 reviews
Search SAUDIA flights
Hainan AirlinesPriceFrom $434Free CancellationRating
8.2
62 reviews
Search Hainan Airlines flights
Air IndiaPriceFrom $472Free CancellationRating
5.5
2,978 reviews
Search Air India flights
Shenzhen AirlinesPriceFrom $494Free CancellationRating
7.6
23 reviews
Search Shenzhen Airlines flights
China EasternPriceFrom $539Free CancellationRating
7.2
192 reviews
Search China Eastern flights
British AirwaysPriceFrom $608Free CancellationRating
6.7
7,705 reviews
Search British Airways flights
Turkish AirlinesPriceFrom $639Free CancellationRating
7.3
4,208 reviews
Search Turkish Airlines flights
Austrian AirlinesPriceFrom $641Free CancellationRating
7.5
895 reviews
Search Austrian Airlines flights
Gulf AirPriceFrom $645Free CancellationRating
7.2
224 reviews
Search Gulf Air flights
Oman AirPriceFrom $657Free CancellationRating
8.0
114 reviews
Search Oman Air flights

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from London to Southeast Asia for you.

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?

Once all potential London to Southeast Asia flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

If you are simply researching potential flights to Southeast Asia, momondo offers a useful price alert feature which will track prices for flights to Southeast Asia from London and alert you when they change.

An easier way to manage your Southeast Asia trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 2/28
Sat 3/7
By creating a price alert you accept our terms of use and privacy policy.

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
Flights to New Yorkfrom $38
Flights to Londonfrom $332
Flights to Bangkokfrom $507
Flights to Tokyofrom $377
Flights to Los Angelesfrom $31
Flights to Parisfrom $354
Flights to Copenhagenfrom $382
Flights to Istanbulfrom $481
Flights to Manilafrom $496
Flights to Romefrom $344
Flights to Miamifrom $49
Flights to Chicagofrom $56