$545 Find Cheap Flights from London Heathrow Airport to Southeast Asia

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Heathrow to Southeast Asia departing on 15/6. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Southeast Asia

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Southeast Asia, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Southeast Asia, as well as popular online travel agencies
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Flight Deals

Book Cheap Heathrow to Southeast Asia Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Heathrow to Southeast Asia that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Heathrow to Southeast Asia

Tue, 5 May - Mon, 25 May
China Eastern Logo
21:20 - 12:20
LHR
-
BKK
33h 00m
2 stops
China Eastern Logo
02:10 - 18:40
BKK
-
LHR
22h 30m
1 stop
$815China Eastern
Wed, 22 Apr - Tue, 19 May
China Eastern Logo
21:20 - 14:55
LHR
-
BKK
35h 35m
2 stops
China Eastern Logo
21:55 - 18:40
BKK
-
LHR
26h 45m
1 stop
$818China Eastern
Sun, 3 May - Mon, 18 May
China Eastern Logo
21:20 - 20:55
LHR
-
BKK
17h 35m
1 stop
China Eastern Logo
03:00 - 18:40
BKK
-
LHR
21h 40m
2 stops
$822China Eastern
Sat, 2 May - Thu, 21 May
Shenzhen Airlines Logo
22:05 - 11:10
LHR
-
BKK
31h 05m
1 stop
Shenzhen Airlines Logo
03:15 - 20:00
BKK
-
LHR
22h 45m
1 stop
$824Shenzhen Airlines
Tue, 5 May - Sun, 17 May
China Eastern Logo
21:20 - 21:55
LHR
-
BKK
18h 35m
1 stop
China Eastern Logo
03:00 - 18:40
BKK
-
LHR
21h 40m
2 stops
$825China Eastern
Sun, 19 Apr - Sun, 21 Jun
SAUDIA Logo
22:10 - 00:05
LHR
-
BKK
19h 55m
1 stop
SAUDIA Logo
15:25 - 07:30
BKK
-
LHR
22h 05m
1 stop
$826SAUDIA
Sat, 2 May - Sun, 31 May
Shenzhen Airlines Logo
22:05 - 02:15
LHR
-
BKK
22h 10m
1 stop
Shenzhen Airlines Logo
12:10 - 19:50
BKK
-
LHR
37h 40m
1 stop
$828Shenzhen Airlines
Sun, 26 Apr - Sun, 3 May
Multiple Airlines Logo
20:50 - 00:10
LHR
-
SIN
20h 20m
2 stops
Multiple Airlines Logo
19:15 - 06:30
SIN
-
LHR
18h 15m
2 stops
$974Multiple Airlines
Sun, 6 Sep - Thu, 24 Sep
Finnair Logo
16:10 - 18:30
LHR
-
SIN
19h 20m
1 stop
Finnair Logo
21:35 - 20:40
SIN
-
LHR
30h 05m
1 stop
$1,007Finnair
Thu, 23 Apr - Wed, 29 Apr
SAUDIA Logo
14:40 - 20:00
LHR
-
DPS
22h 20m
2 stops
SAUDIA Logo
21:55 - 12:40
DPS
-
LHR
21h 45m
2 stops
$1,011SAUDIA
Booking Insights

KAYAK's insights & trends for Heathrow to Southeast Asia flights

Get data-powered insights and trends into flights from Heathrow to Southeast Asia to help you find the cheapest flights, the best time to fly, and much more.

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

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Southeast Asia from London Heathrow Airport found in the last 72 hours was to Bangkok, at $1,453 return. The most popular route is from London Heathrow Airport (LHR) to Singapore (SIN), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $1,453.

Can I save money by flying with a stopover from London Heathrow Airport to Southeast Asia?

The average return price for all direct flights, flights with one stopover, and flights with two stopovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $894, prices are generally cheapest when you fly direct.

What is the cheapest month to fly from London Heathrow Airport to Southeast Asia?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from London Heathrow Airport to Southeast Asia, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from London Heathrow Airport to Southeast Asia is November, when tickets cost $1,257 (return) on average. On the other hand, the most expensive months are July and August, when the average cost of return tickets is $2,068 and $1,893 respectively.

How far in advance should I book a flight from London Heathrow Airport to Southeast Asia?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from London Heathrow Airport to Southeast Asia, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below-average price on a flight from London Heathrow Airport to Southeast Asia, you should book around 3 weeks before departure, which saves you about 18% compared to booking last-minute. For the absolute cheapest price, our data suggests you should book 26 weeks before departure.

Good to know

Low seasonSeptember
Cheapest flight$545
Best time to beat the crowds (14% less expensive on average)
Most popular time to fly (31% more expensive on average)
Flight from London Heathrow Airport to Bangkok

Flights from Heathrow to Southeast Asia: the best tips from KAYAK users

Insights shared by verified travellers who flew the route from Heathrow to Southeast Asia 
MartinFlew with Singapore Airlines
LHR
-
SIN
Jan 2025
It’s a long time sitting in that seat so sit on a cushion!
Verified travelerFlew with Qantas Airways
LHR
-
SIN
Sept 2024
Unless you’re flying Business or First Class, definitely take your own travel pillow - they make a difference.
OmarFlew with Qantas Airways
LHR
-
SIN
May 2024
Qantas lounge was crowded. try other One World lounges
Verified travelerFlew with Singapore Airlines
LHR
-
SIN
Feb 2024
Flew with Singapore Airlines great experience and efficient transfer to next flight at Changi . Premium economy was worth the extra giving easier boarding and comfortable seats with more room.

FAQs - booking Southeast Asia flights

  • How does KAYAK find such low prices on flights from London Heathrow Airport to Southeast Asia?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from London Heathrow Airport to Southeast Asia.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London Heathrow Airport to Southeast Asia?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from London Heathrow Airport to Southeast Asia is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from London Heathrow Airport to Southeast Asia?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly from London Heathrow Airport to Southeast Asia with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London Heathrow Airport to Southeast Asia?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from London Heathrow Airport to Southeast Asia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top tips for finding cheap flights to Southeast Asia

  • Looking for a cheap flight? 25% of our users found tickets from London Heathrow Airport to the following destinations at these prices or less: Hanoi $2,256 one-way - $1,320 round-trip; Kuala Lumpur $1,006 one-way - $1,787 round-trip; Singapore $980 one-way - $1,946 round-trip

Reviews of the top airline flying from Heathrow to Southeast Asia

 
See real verified KAYAK customer reviews for airlines flying from London to Southeast Asia. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Heathrow to Southeast Asia? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.8
Thai AirwaysOverall score based on 392 reviews
6.8Entertainment
7.4Food
7.6Comfort
7.9Boarding
8.4Crew
Airline reviews

We still get drinks and a snack. Love the gift bags too.

10.0 ExcellentTsaav Stuvy, Mar 2026
BKK - UTH
Read more Thai Airways reviews

We still get drinks and a snack. Love the gift bags too.

business class is old but still done very well by the team.

Excellent airline. The plane was clean and the staff were very attentive

Good experience although the boarding gate is at the terminal extension hence need to leave lounge to head over earlier.

Thai Royal First is very good. Easy check in , Private room in the first class lounge and escort from ticketing to the plane. Once on board crew was very polite, food was outstanding, and the ride was smooth as silk. Restrooms were especially clean. Great Experience

I'm not interested in improving the airline. Therefore, I won't explain this in more detail. Next time I'll try a different one.

The flight (boarding) was delayed by 40-50 minutes and there was very crowed. They need to improve on the timeliness & boarding process. (They asked passenger to board in groups, but the 2nd group was standing there waiting for 20 minutes!). However, services from the crew was very good, also the food was good as well. I also found the legroom was quite comfortable.

Need to improve on punctuality. My flight was delayed by 1 hour.

Seats were uncomfortable and the vegetarian meal was awful. Some of the entertainment didn't work.

Except that our flight was cancelled, by mail, and later moved to 12 hours prior, then the experience was good. In Bangkok we were offered a hotel, it was fine, but would have been nice to know in advance😉

Everything you need to know for your flight to Southeast Asia

Information on your arrival and departure airports