Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from London Heathrow Airport to Southeast Asia from $317

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 8/28. 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

Shenzhen Airlines Logo
10:05 pm - 11:10 amLHR-BKK
31h 05m1 stop
Shenzhen Airlines Logo
7:30 pm - 8:00 pmBKK-LHR
30h 30m1 stop
$462Shenzhen Airlines
Find Deal
Mon, Sep 22 - Tue, Sep 30
Shenzhen Airlines Logo
10:05 pm - 2:15 amLHR-BKK
22h 10m1 stop
Shenzhen Airlines Logo
12:10 pm - 8:00 pmBKK-LHR
37h 50m1 stop
$464Shenzhen Airlines
Find Deal
Mon, Sep 22 - Tue, Sep 30
Shenzhen Airlines Logo
10:05 pm - 2:15 amLHR-BKK
22h 10m1 stop
Shenzhen Airlines Logo
3:15 am - 8:00 pmBKK-LHR
22h 45m1 stop
$465Shenzhen Airlines
Find Deal
Mon, Sep 15 - Tue, Oct 14
Air China Logo
10:40 pm - 11:55 amLHR-HAN
31h 15m1 stop
Air China Logo
1:20 pm - 3:55 pmHAN-LHR
33h 35m1 stop
$517Air China
Find Deal
Mon, Oct 20 - Mon, Nov 10
Air China Logo
10:40 pm - 12:15 amLHR-CGK
19h 35m1 stop
Air China Logo
1:45 am - 5:50 pmCGK-LHR
23h 05m1 stop
$570Air China
Find Deal
Tue, Oct 21 - Sun, Nov 23
China Southern Logo
10:10 pm - 10:20 amLHR-BKK
30h 10m1 stop
China Southern Logo
3:00 am - 7:00 pmBKK-LHR
22h 00m1 stop
$575China Southern
Find Deal
Wed, Sep 24 - Sun, Oct 5
China Southern Logo
10:00 pm - 10:30 pmLHR-BKK
17h 30m1 stop
China Southern Logo
11:25 am - 6:15 pmBKK-LHR
37h 50m1 stop
$581China Southern
Find Deal
Sun, Nov 9 - Mon, Nov 24
Cathay Pacific Logo
11:00 am - 5:35 pmLHR-HKT
23h 35m1 stop
Cathay Pacific Logo
6:35 pm - 5:20 pmHKT-LHR
29h 45m1 stop
$802Cathay Pacific
Find Deal
Sat, Nov 29 - Mon, Dec 22
Singapore Airlines Logo
10:05 pm - 2:45 pmLHR-LGK
33h 40m1 stop
Singapore Airlines Logo
3:30 pm - 5:55 amLGK-LHR
22h 25m1 stop
$1,033Singapore Airlines
Find Deal
Mon, Oct 13 - Mon, Oct 27
Singapore Airlines Logo
10:55 am - 2:45 pmLHR-LGK
19h 50m1 stop
Singapore Airlines Logo
10:45 am - 5:55 amLGK-LHR
27h 10m2 stops
$1,145Singapore Airlines
Find Deal
Mon, Jan 12 - Mon, Jan 26

Hainan Airlines flights from London Heathrow Airport to Southeast Asia

Our best Hainan Airlines deals on London Heathrow Airport to Southeast Asia flight tickets
Hainan Airlines
Sep 15
LHR10:00 pmLondon Heathrow
30h 00m
2 stops
BKK10:00 amBangkok Suvarnabhumi
Oct 14
BKK11:05 amBangkok Suvarnabhumi
38h 25m
1 stop
LHR7:30 pmLondon Heathrow
$538
Find similar
Hainan Airlines
Oct 27
LHR9:00 pmLondon Heathrow
30h 05m
2 stops
BKK10:05 amBangkok Suvarnabhumi
Nov 23
BKK1:35 amBangkok Suvarnabhumi
23h 20m
2 stops
LHR5:55 pmLondon Heathrow
$545
Find similar
Hainan Airlines
Sep 17
LHR10:00 pmLondon Heathrow
30h 00m
1 stop
BKK10:00 amBangkok Suvarnabhumi
Oct 12
BKK7:20 pmBangkok Suvarnabhumi
30h 10m
2 stops
LHR7:30 pmLondon Heathrow
$546
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
Sep 22
LHR10:05 pmLondon Heathrow
31h 05m
1 stop
BKK11:10 amBangkok Suvarnabhumi
Sep 30
BKK7:30 pmBangkok Suvarnabhumi
30h 30m
1 stop
LHR8:00 pmLondon Heathrow
$462
Find similar
Shenzhen Airlines
Sep 22
LHR10:05 pmLondon Heathrow
22h 10m
1 stop
BKK2:15 amBangkok Suvarnabhumi
Sep 30
BKK12:10 pmBangkok Suvarnabhumi
37h 50m
1 stop
LHR8:00 pmLondon Heathrow
$464
Find similar
Shenzhen Airlines
Sep 15
LHR10:05 pmLondon Heathrow
22h 10m
1 stop
BKK2:15 amBangkok Suvarnabhumi
Oct 14
BKK3:15 amBangkok Suvarnabhumi
22h 45m
1 stop
LHR8:00 pmLondon Heathrow
$465
Find similar

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 July 31, 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

Mon 9/22

10:05 pm-11:10 am

1 stop31h 05m

Bangkok Suvarnabhumi

Tue 9/30

7:30 pm-8:00 pm

1 stop30h 30m

$462

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Mon 9/22

10:05 pm-2:15 am

1 stop22h 10m

Bangkok Suvarnabhumi

Tue 9/30

12:10 pm-8:00 pm

1 stop37h 50m

$464

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Mon 9/15

10:05 pm-2:15 am

1 stop22h 10m

Bangkok Suvarnabhumi

Tue 10/14

3:15 am-8:00 pm

1 stop22h 45m

$465

LondonHanoi

LHR - HAN

LHRHAN

London Heathrow

Mon 10/20

10:40 pm-11:55 am

1 stop31h 15m

Hanoi Noibai

Mon 11/10

1:20 pm-3:55 pm

1 stop33h 35m

$517

LondonJakarta

LHR - CGK

LHRCGK

London Heathrow

Tue 10/21

10:40 pm-12:15 am

1 stop19h 35m

Jakarta Soekarno-Hatta Intl

Sun 11/23

1:45 am-5:50 pm

1 stop23h 05m

$570

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Wed 9/24

10:10 pm-10:20 am

1 stop30h 10m

Bangkok Suvarnabhumi

Sun 10/5

3:00 am-7:00 pm

1 stop22h 00m

$575

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sun 11/9

10:00 pm-10:30 pm

1 stop17h 30m

Bangkok Suvarnabhumi

Mon 11/24

11:25 am-6:15 pm

1 stop37h 50m

$581

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Sat 11/29

11:00 am-5:35 pm

1 stop23h 35m

Phuket City

Mon 12/22

6:35 pm-5:20 pm

1 stop29h 45m

$802

LondonLangkawi

LHR - LGK

LHRLGK

London Heathrow

Mon 10/13

10:05 pm-2:45 pm

1 stop33h 40m

Langkawi

Mon 10/27

3:30 pm-5:55 am

1 stop22h 25m

$1,033

LondonLangkawi

LHR - LGK

LHRLGK

London Heathrow

Mon 1/12

10:55 am-2:45 pm

1 stop19h 50m

Langkawi

Mon 1/26

10:45 am-5:55 am

2 stops27h 10m

$1,145

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 May is, on average, the cheapest month to fly to Southeast Asia from London Heathrow Airport, with most prices found around $826. If you don’t want to visit Southeast Asia in May, then you should wait until June to fly from London Heathrow Airport, when ticket prices are also cheap, with an average price of $832.

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 $996. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $1,077. 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 afternoon 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 $798. Flying to Southeast Asia in the afternoon 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 $1,058. 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 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 $945 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 $872 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

Best Price Found

$317

Fastest flight time

12h 55m

Direct flights

Every day

Airports in Southeast Asia

10 airports
The best one-way flight to Southeast Asia from London Heathrow Airport in the past 72 hours is $317. The best round-trip flight deal from London Heathrow Airport to Southeast Asia found on momondo in the last 72 hours is $462.
The fastest flight from London Heathrow Airport to Southeast Asia takes 12h 55m
Direct flights go from London Heathrow Airport to Southeast Asia every day.
There are 10 airports near Southeast Asia: Phuket City (HKT), Langkawi (LGK), Bangkok Suvarnabhumi (BKK), Kuala Lumpur Intl (KUL), Hanoi Noibai (HAN), Denpasar Bali Ngurah Rai (DPS), Jakarta Soekarno-Hatta Intl (CGK), Singapore Changi (SIN), Manila Ninoy Aquino Intl (MNL), Ho Chi Minh City (SGN)
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
627 reviews
Search SAUDIA flights
Shenzhen AirlinesPriceFrom $457Free CancellationRating
6.8
15 reviews
Search Shenzhen Airlines flights
Gulf AirPriceFrom $514Free CancellationRating
7.1
203 reviews
Search Gulf Air flights
China EasternPriceFrom $533Free CancellationRating
7.2
158 reviews
Search China Eastern flights
China SouthernPriceFrom $540Free CancellationRating
7.6
104 reviews
Search China Southern flights
Hainan AirlinesPriceFrom $560Free CancellationRating
8.2
43 reviews
Search Hainan Airlines flights
Air IndiaPriceFrom $590Free CancellationRating
5.5
2,928 reviews
Search Air India flights
British AirwaysPriceFrom $620Free CancellationRating
6.6
7,222 reviews
Search British Airways flights
Austrian AirlinesPriceFrom $673Free CancellationRating
7.6
823 reviews
Search Austrian Airlines flights
Oman AirPriceFrom $686Free CancellationRating
8.3
91 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
Tue 8/5
Tue 8/12
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 $39
Flights to Londonfrom $283
Flights to Bangkokfrom $515
Flights to Tokyofrom $493
Flights to Los Angelesfrom $37
Flights to Parisfrom $255
Flights to Copenhagenfrom $268
Flights to Istanbulfrom $435
Flights to Manilafrom $523
Flights to Miamifrom $58
Flights to Romefrom $178
Flights to Chicagofrom $59