£273 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 17/5. 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.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Southeast Asia.
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Flight Deals

Cheap Flights from Heathrow to Southeast Asia

Cheapest return prices found by our users on KAYAK in the last 72 hours
Bangkok
Bangkok1 stop£432
Manila
Manila1 stop£467
Kuala Lumpur
Kuala Lumpur1 stop£448
Singapore
Singapore1 stop£489
Phuket City
Phuket City2 stops£496
Denpasar
Denpasar1 stop£589
Hanoi
Hanoi1 stop£401
Ho Chi Minh City
Ho Chi Minh City1 stop£454
Ko Samui
Ko Samui2 stops£758
Cebu City
Cebu City2 stops£668
Da Nang
Da Nang2 stops£660
Chiang Mai
Chiang Mai2 stops£502
Krabi
Krabi2 stops£457
Phnom Penh
Phnom Penh2 stops£1,962
Angeles City
Angeles City1 stop£765
Penang
Penang1 stop£605
Siem Reap
Siem Reap2 stops£702
Langkawi
Langkawi2 stops£658
Davao City
Davao City2 stops£684
Bangkok
Bangkok1 stop£432
Manila
Manila1 stop£467
Kuala Lumpur
Kuala Lumpur1 stop£448
Singapore
Singapore1 stop£489
Phuket City
Phuket City2 stops£496
Denpasar
Denpasar1 stop£589
Hanoi
Hanoi1 stop£401
Ho Chi Minh City
Ho Chi Minh City1 stop£454
Ko Samui
Ko Samui2 stops£758
Cebu City
Cebu City2 stops£668
Da Nang
Da Nang2 stops£660
Chiang Mai
Chiang Mai2 stops£502
Krabi
Krabi2 stops£457
Phnom Penh
Phnom Penh2 stops£1,962
Angeles City
Angeles City1 stop£765
Penang
Penang1 stop£605
Siem Reap
Siem Reap2 stops£702
Langkawi
Langkawi2 stops£658
Davao City
Davao City2 stops£684

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

Mon, 21 Sep - Mon, 12 Oct
Air China Logo
20:25 - 11:55
LHR
-
HAN
33h 30m
1 stop
Air China Logo
13:25 - 20:25
HAN
-
LHR
37h 00m
1 stop
£401Air China
Mon, 21 Sep - Mon, 12 Oct
Air China Logo
20:25 - 11:55
LHR
-
HAN
33h 30m
1 stop
Air China Logo
13:25 - 20:25
HAN
-
LHR
37h 00m
1 stop
£409Air China
Sun, 31 May - Sat, 20 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
£432SAUDIA
Mon, 8 Jun - Sun, 21 Jun
SAUDIA Logo
10:00 - 13:45
LHR
-
BKK
21h 45m
1 stop
SAUDIA Logo
15:25 - 14:15
BKK
-
LHR
28h 50m
1 stop
£434SAUDIA
Thu, 14 May - Thu, 18 Jun
Vietnam Airlines Logo
18:55 - 13:35
LHR
-
SGN
12h 40mdirect
Vietnam Airlines Logo
09:30 - 16:55
SGN
-
LHR
13h 25mdirect
£485Vietnam Airlines
Tue, 12 May - Thu, 18 Jun
Vietnam Airlines Logo
19:50 - 14:30
LHR
-
SGN
12h 40mdirect
Vietnam Airlines Logo
09:30 - 16:55
SGN
-
LHR
13h 25mdirect
£486Vietnam Airlines
Wed, 1 Jul - Sun, 19 Jul
Air India Logo
20:35 - 13:30
LHR
-
DPS
33h 55m
1 stop
Air India Logo
14:35 - 19:00
DPS
-
LHR
35h 25m
1 stop
£589Air India
Mon, 7 Sep - Mon, 21 Sep
Air India Logo
13:15 - 13:30
LHR
-
DPS
41h 15m
1 stop
Air India Logo
14:35 - 11:30
DPS
-
LHR
27h 55m
1 stop
£592Air India
Sat, 20 Jun - Wed, 8 Jul
Emirates Logo
20:40 - 22:25
LHR
-
DPS
18h 45m
1 stop
Emirates Logo
19:45 - 07:05
DPS
-
LHR
18h 20m
1 stop
£595Emirates
Tue, 1 Sep - Tue, 13 Oct
Emirates Logo
09:05 - 11:25
LHR
-
DMK
20h 20m
1 stop
Emirates Logo
23:50 - 12:25
DMK
-
LHR
18h 35m
1 stop
£652Emirates
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 Phuket City, at £616 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 £676.

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 £739 on average. Morning departures are around 1% more expensive than evening flights, 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 £795.

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 £442, 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 May, when tickets cost £591 (return) on average. On the other hand, the most expensive months are July and December, when the average cost of return tickets is £884 and £872 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.

For London Heathrow Airport to Southeast Asia, Tuesday is the cheapest day to fly on average and Saturday is the most expensive. Flying from Southeast Asia back to London Heathrow Airport, the best deals are generally found on Monday, with Tuesday being the most expensive.

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 9% compared to booking last-minute. For the absolute cheapest price, our data suggests you should book 7 weeks before departure.

Good to know - Cheap tickets from London Heathrow Airport to Southeast Asia

Low seasonSeptember
Cheapest flight£273
Best time to beat the crowds (13% less expensive on average)
Most popular time to fly (30% more expensive on average)
Flight from London Heathrow Airport to Hanoi

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 a cheap flight from London Heathrow Airport to Southeast Asia

  • Looking for a cheap flight from London Heathrow Airport to Southeast Asia? 25% of our users found tickets from London Heathrow Airport to Southeast Asia for the following prices or less: Bangkok £528 one-way - £822 round-trip; Singapore £483 one-way - £879 round-trip

Reviews of the top 5 airlines 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.
8.2
Singapore AirlinesOverall score based on 1502 reviews
8.3Boarding
8.0Entertainment
8.0Comfort
7.8Food
8.6Crew
Airline reviews

It was fine. Nothing special but nothing went wrong so all good.

8.0 ExcellentWendy, Mar 2026
MXP - SIN
Read more Singapore Airlines reviews

It was fine. Nothing special but nothing went wrong so all good.

I loved the full Taylor Swift selection but felt that the other selections were limited, didn’t span the popular music eras nor a wide enough range of music genres. BUT the seat and bed were GREAT (it was wide, long enough, had great storage, firm enough to uphold body postural comfort). Outstanding crew and really great food - gourmet innovative dim sum breakfast so different from the boring standard fare offered by many other business class products.

Overall the airline tried to give excellent service. The wheelchair service was bad at SFO. My baggage was also delayed but I thank them for taking the trouble to find it and deliver it to my home.

First time flying with Singapore airlines and I’ll give them two thumbs up 👍 👍

Food was served to different people at different times and it wasn't clear why. The crew apologized for the wait. But it felt odd and inconsistent. They could use charging ports on each of the seats. Mine didn't have any. Also, they could've offered more snacks. It was a 12+ hour flight and no snacks were ever offered. Everything else was OK.

I find it was a bit hot before take off. If there is a way to improve the airflow it would be great

The flight arrived on time. 2×2 seating meant no one needed to sit in the middle. This was a connectibf flight from Singapore and required going to 3 counters in different levels to check a golf bag

toilets could be cleaned more frequently, everything else was pretty good.

The crew was very courteous and professional. the flight is relatively clean and comfortable.

Pleasant business class flight experience with good onboarding experience. Flight service team was excellent with usual book-the-chef menu available

The crew and the food were excellent. The plane was kept quite clean.

The worst experience ever! Lots of flight delays and rerouting that ended up doubling the total time. . I had to recheck my luggage because I was rerouted to Tokyo and ended up on ANA flight. I missed connecting flight twice because of the delay at Cathy Pacific. Additional stop added, rerouted to a different country for connecting flight and ended up in long waits and delays.

I didn’t use entertainment But everything else was of excellent quality

It was great. It was my first time with Cathay Pacific and I really recommend.

Selected ovo lacto meal because I’m ok with milk products but not any meat. It was terrible. We had the same selection back in October when we had traveled and it was pretty good at that time. It was gross this time.

I was mid plane and they were already out of the main beef entree....ugh!

great experience. better than all other airlines flying this route.

I didn't have much experience with Cathay Pacific airlines because of delay and missed connections, the bulk of the trip was on Japan Airlines.

The crew, pilots and flight attendants were all amazing. What could be better is reinforcing that seats cannot be reclined at departure and landing. I had a person seated in front of me who had her seat all the way inclined, including during take-off - after the crew asked her to seat upright. Cathay Pacific should reinforce this safety request and perhaps penalize those who don't follow it. I felt very unsafe with this person limiting my space and perhaps putting my life in danger in the "unlikely" case of an emergency.

Great service from crews and delicious dishes, snacks and drinks. Egg tarts and local dimsum are delicious.

Extremely uncomfortable seats with very little cushioning, unable to recline enough to sleep comfortably on this 13 hour overnight flight. My body was in pain by the end.

The boarding process was awful-the computers were down and there was no way to check in. Took extremely long, very chaotic and no guarantee our bags were even getting on the plane. I was also delayed and took away from any time i had to catch a connecting flight.

Charged extra amount for the baggage wait. Even it’s less than 23kgs. Those machines are showing wrong weight and they were charging money wantedly from everyone.

This flight was a very good trip for us. The crew were very friendly and helpful. They made arrangements for my husband to have assistance in boarding. We were not expecting a meal, so it was a pleasant surprise on this short flight to have a meal and beverage from a very courteous crew.

I always fly with Qatar air and you are the best. Keep up the good wor, after travelling with Qatar Air More than 80 times, you never offer to upgrade me.but it happened to my friend companion some time. Any how i still enjoying travelling with Qatar air and wait one day to upgrade me too. Best Regards

Looks like a local flight. Food was horrible. No entertainment system.

The service was good but the food was a NO

Awesome hospitality, awesome staff, awesome food & awesome travel time. Thanks

Nothing to complain. The staff and flight was good especially the seats which was better compared than the cloth ones on Qatar airways

The flight was operated by IndiGo and not Qatar, which is a budget airline from India. Nevertheless, the flight was uneventful.

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

Good one but just notice that you have to ask several time to get water or coffee .

It was great! Kept the time. Provided what was promised

The crew could have been more friendly and could have offered to make the beds. Also, Ethiad should have more vegetarian food options.

Kayak and Aran grant issuing business class tickets without lounge access and sometimes 1 or 2 connections in economy class. It’s very disappointing to find out that after buying the ticket. Never buy tickets on kayak and Aran grant again

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

I missed my flight ,staff unhelpful, they sat and watched me wait ,gangway door closed, English was a problem no announcement I was on time now I missed my month vacation ,lost 1400 bucks no refund I'm sick to my stomach

1 hour flight. No complaints. Some drinks would have been nice.

Crew was amazing as usual. Very comfortable for a 13hour flight. Check in at ATL was terrible. Ticket counter charged me $200 for a small bag. Apparently Kayak sold me a zero luggage ticket. No carry on no checked. So the check in desk charged me a bullshit $200 dollar fee for a small gym bag weighing less than 20lbs. In true 3rd party ticket buying. This will turn into a finger pointing process between Kayak and Etihad. Now I'm going to have to ship my bag back in the mail a day ahead of my return flight.

The meals were not the greatest and lacking of appetite but everything else was spot on

Overall, excellent: check-in, boarding, service, and food. The Business Class seating is a little less private and spacious than the world's premier airlines, but still very good for a long haul flight.

On time. Friendly and helpful flight attendants. The plane was clean. Having a wine available would have been nice.

Your staff was exceptional. Could teach the other airlines-rules on etiquette, and service. Excellent landings on flights, carried out by your pilots. Only complaint is long delay on return flight in Beijing, onto Vancouver.

Worst than I expected, crew was not attentive, meal was as disgusting , they didn’t even drink selections as they would to other passengers. I felt discriminated

cannot get seat information for LAX to IAH when check in in XI,AN

UA is ok. But check in was a very bad experience

I hate that you cannot check in online and when you are at the airport, there aren't any aisle seats left. Also, they could work a little on subtitles for their movies (not everyone is a native English speaker).

Nothing to complain of, the only reason I am not giving better marks is that I am used to flying with ANA and they are the top.

It's terrible that we can't do online check in because we didn't buy the tickets directly from Air china. It was not explained until I contacted Chatdeal and we could not sit together.

Everything you need to know for your flight to Southeast Asia

Information on your arrival and departure airports