฿12,007 Find Cheap Flights from London Heathrow Airport to Southeast Asia – Compare and Save

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 14/9. 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

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Best Southeast Asia Flight Deals from Heathrow

Cheapest return prices found by our users on KAYAK in the last 72 hours
Bangkok
Bangkok1 stop฿21,391
Chiang Mai
Chiang Mai1 stop฿26,907
Phuket City
Phuket City1 stop฿25,461
Hat Yai
Hat Yai3 stops฿27,882
Krabi
Krabi1 stop฿18,969
Ko Samui
Ko Samui2 stops฿31,414
Chiang Rai
Chiang Rai2 stops฿32,591
Surat Thani
Surat Thani2 stops฿32,221
Bangkok
Bangkok1 stop฿21,391
Chiang Mai
Chiang Mai1 stop฿26,907
Phuket City
Phuket City1 stop฿25,461
Hat Yai
Hat Yai3 stops฿27,882
Krabi
Krabi1 stop฿18,969
Ko Samui
Ko Samui2 stops฿31,414
Chiang Rai
Chiang Rai2 stops฿32,591
Surat Thani
Surat Thani2 stops฿32,221

Cheap Flights from Heathrow to Southeast Asia

 
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

Thu 12 Nov - Thu 26 Nov
เอทิฮัดแอร์เวย์ Logo
20:55 - 18:05
LHR
-
KBV
14h 10m
1 stop
เอทิฮัดแอร์เวย์ Logo
08:40 - 18:10
KBV
-
LHR
16h 30m
1 stop
฿18,969เอทิฮัดแอร์เวย์
Fri 6 Nov - Sat 14 Nov
เอทิฮัดแอร์เวย์ Logo
08:50 - 06:20
LHR
-
KBV
14h 30m
1 stop
เอทิฮัดแอร์เวย์ Logo
08:40 - 18:10
KBV
-
LHR
16h 30m
1 stop
฿20,685เอทิฮัดแอร์เวย์
Wed 12 Aug - Thu 10 Sep
ไห่หนานแอร์ไลน์ Logo
22:00 - 10:00
LHR
-
BKK
30h 00m
1 stop
ไห่หนานแอร์ไลน์ Logo
19:20 - 19:30
BKK
-
LHR
30h 10m
2 stops
฿21,391ไห่หนานแอร์ไลน์
Fri 28 Aug - Tue 8 Sep
Air China Logo
20:25 - 00:10
LHR
-
BKK
21h 45m
1 stop
Air China Logo
19:35 - 20:25
BKK
-
LHR
30h 50m
1 stop
฿21,458Air China
Fri 2 Oct - Sun 11 Oct
China Eastern Logo
21:20 - 14:55
LHR
-
BKK
35h 35m
3 stops
China Eastern Logo
20:50 - 18:40
BKK
-
LHR
51h 50m
2 stops
฿21,492China Eastern
Sun 30 Aug - Mon 12 Oct
China Eastern Logo
21:20 - 18:05
LHR
-
BKK
38h 45m
1 stop
China Eastern Logo
15:55 - 18:40
BKK
-
LHR
32h 45m
2 stops
฿21,526China Eastern
Sat 12 Sep - Mon 12 Oct
China Eastern Logo
21:20 - 01:10
LHR
-
BKK
21h 50m
2 stops
China Eastern Logo
15:55 - 18:40
BKK
-
LHR
32h 45m
2 stops
฿21,626China Eastern
Mon 30 Nov - Thu 28 Jan
China Eastern Logo
21:00 - 04:05
LHR
-
BKK
24h 05m
1 stop
China Eastern Logo
05:05 - 17:30
BKK
-
LHR
19h 25m
1 stop
฿21,660China Eastern
Tue 8 Sep - Thu 8 Oct
Multiple Airlines Logo
22:40 - 17:45
LHR
-
HKT
37h 05m
1 stop
Multiple Airlines Logo
22:20 - 11:30
HKT
-
LHR
19h 10m
1 stop
฿25,494Multiple Airlines
Mon 17 Aug - Tue 22 Sep
Multiple Airlines Logo
21:20 - 21:40
LHR
-
HKT
18h 20m
1 stop
Multiple Airlines Logo
11:05 - 18:10
HKT
-
LHR
37h 05m
1 stop
฿25,528Multiple Airlines
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 5 days was to Singapore, at ฿32,972 return. The most popular route is from London Heathrow Airport (LHR) to Bangkok Suvarnabhumi Airport (BKK), and the cheapest return airline ticket found on this route in the last 5 days was ฿32,994.

What is the cheapest time of day to fly to Southeast Asia?

The average price for all round-trip flights from London Heathrow Airport to Southeast Asia depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to Southeast Asia is generally at night, when retur flights cost ฿34,353 on average. The most expensive time of day to fly to Southeast Asia is generally in the morning, which is peak travel time and where the average cost of a ticket is ฿44,725.

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 ฿24,276, 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 ฿28,084 (return) on average. On the other hand, the most expensive months are December and July, when the average cost of return tickets is ฿46,583 and ฿43,623 respectively.

What’s the cheapest day of the week to fly from London Heathrow Airport to Southeast Asia?

The average price of all round-trip flights from London Heathrow Airport to Southeast Asia clicked on KAYAK for each day over the last 12 months.

When flying from London Heathrow Airport to Southeast Asia, you should consider leaving on a Saturday and avoid Thursdays if you are looking for the best rates. For your return to London Heathrow Airport, you’ll find the best rates on Sundays and the most expensive ones on Fridays.

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 4 weeks before departure, which saves you about 11% compared to booking last-minute. For the absolute cheapest price, our data suggests you should book 9 weeks before departure.

Good to know

Low season

June

Cheapest flight

฿12,007
Best time to beat the crowds (11% less expensive on average)
Most popular time to fly (3% more expensive on average)
Flight from London Heathrow Airport to Phuket City

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 แควนตัสแอร์เวย์
LHR
-
SIN
Sep 2024
Unless you’re flying Business or First Class, definitely take your own travel pillow - they make a difference.
OmarFlew with แควนตัสแอร์เวย์
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: Bangkok ฿23,927 one-way - ฿36,437 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.
7.3
เอทิฮัดแอร์เวย์Overall score based on 1484 reviews
7.8Crew
7.6Boarding
7.3Comfort
7.2Food
7.2Entertainment
Airline reviews

On time and no hassle luggage policy (2 checked in and 1 cabin bag)

8.0 ExcellentVictor, Jul 2026
BOS - AUH
Read more เอทิฮัดแอร์เวย์ reviews

On time and no hassle luggage policy (2 checked in and 1 cabin bag)

They lost the baggage and said it was deleted from the system. I had baggage tag so was able to file the complaint but there was no PIR number and update so far

I booked tickets for a family of five and specifically paid extra to select our seats together. We spent nearly $1,000 extra (around $100 per seat) for extra legroom so we could sit near each other. However, despite paying for this, we ended up being separated on the flight. This caused a major issue for our family because my parents do not speak English and rely on me to translate and assist them during the journey. I do not understand why Etihad changed our reserved seats without explanation. I am extremely dissatisfied with this experience. I expect the airline to do better, and I am requesting a full refund for the seat selection fees we paid.

1 hour delay meant missed my connecting flight and 1st day of holiday

Etihad Check In counter/Station manager in Heathrow was bothering and not helpful at all. They are rude and not customer oriented

I am a larger than average person and in my opinion i don't think it's fair to allocate a window seat to anyone who is my size or larger, i was seated between 2 large passengers on a full aircraft. The guy in the window seat also occupied a portion of the middle seat (my seat) which made my experience of flying with etihad very cramped and uncomfortable, i was flying from Abu Dhabi to Bangkok. Had this been a airbus 380 it would have been better as the seats are larger but unfortunately it wasn't so i had to endure the 6+hrs unable to get any rest

The flight take time was changed 23 times. The system kept sending messages it will be earlier at 4am and eventually the flight was at 9am I didn’t sleep all night because of that

The business class experience is fantastic. The crew were polite but often unavailable even when I tried to call them! I even found myself bringing my used dishes and cutlery up to the crew because no one had come to collect it after over an hour.

Very unfriendly team. It was very difficult to get a cup of coffee. Legroom was extremely small. Old, dilapidated plane.

Very very bad service very tight seats never ever flying with Etihad again

Everything you need to know for your flight to Southeast Asia

Information on your arrival and departure airports