€391 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 7/3. 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

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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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Good to know

Low season

September

High season

December
Best time to beat the crowds (12% less expensive on average)
Most popular time to fly (30% more expensive on average)

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 AirlinesLHR-SINJan 2025
It’s a long time sitting in that seat so sit on a cushion!
Verified travelerFlew with Qantas AirwaysLHR-SINSept 2024
Unless you’re flying Business or First Class, definitely take your own travel pillow - they make a difference.
NorhayatiFlew with Malaysia AirlinesLHR-KULMar 2024
Take MH (Malaysia Airline) coz they are good
OmarFlew with Qantas AirwaysLHR-SINMay 2024
Qantas lounge was crowded. try other One World lounges
Verified travelerFlew with Singapore AirlinesLHR-SINFeb 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.

See more FAQs

Top tips for finding cheap flights to Southeast Asia

  • Book at least 1 week before departure in order to get a below-average price.
  • High season is considered to be June, July and August. The cheapest month to fly from London is May.

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.
7.6
Vietnam AirlinesOverall score based on 211 reviews
7.6Comfort
6.9Food
6.4Entertainment
8.1Crew
7.6Boarding
Airline reviews

I bought the front row seat and made and early online check in but they changed my seat to the back row without prior notice. The inflight meal was too poor, only a piece of small finger food. The boarding is a disaster, everyone is stuffed in a bus in chaos. Doesnt worth the money at all.

4.0 OkayChi-Dung, Jan 2025HAN - SGN
Read more Vietnam Airlines reviews

I bought the front row seat and made and early online check in but they changed my seat to the back row without prior notice. The inflight meal was too poor, only a piece of small finger food. The boarding is a disaster, everyone is stuffed in a bus in chaos. Doesnt worth the money at all.

Poor. Flight was delay without prior notice. Poor boarding. Poor meal service. Plane was dirty and smelly. Does not worth the money.

Overall very nice airline. The seats were cloth unlike leather seats I am accustom to on planes. The food was adequate. I had to use a paper boarding pass as they do not like electronic boarding passes. I scanned my electronic pass, but the gate agent requested the paper pass. Luckily I had a paper pass, although my electronic pass worked and when the paper pass was scanned it stated I was already on board.

Overall very nice airline. The seats were cloth unlike leather seats I am accustom to on planes. The food was adequate.

I am a bit upset with the check in counter, I signed up a wheelchair for my mom so they wouldn’t grant us her boarding pass. We got to the airport a couple of hours earlier and they had us wait and no one ever gave us her boarding pass or the wheelchair, I had to go back and complain when it was already time for our flight to board. Since we got their earlier, I could have easily pushed my mom myself and we could have relaxed and went to the lounge while waiting… when I finally got someone to help us he couldn’t explain how and why they dismissed us in the first place.

Was on holiday with my partner and we booked with Vietnam airlines as it not meant to be a budget airline. They separated us and made us sit at either end of the plane. Not the way I planned to spend my time on my holiday separate from my loved one. How can they separate people on the same booking. They know we are together and spending quality time together.

I had sometimes my trips with Vietnam Airlines and I like it 😊

The check-in process was great, and I cannot remember the name of the supervisor, but he was good and told us about the transit process very correctly and efficiently and kindly. We were given down access and the overall process was very efficient.

The plane had a technical problem it would delayed 10 hours but they just gave limited information and put all passengers into the Miracle lounge. Ther were not enough chairs and so on.

Ensure there is a choice of food for all customers and also enough food

Book cheap flights from London to Southeast Asia

Recent return flight deals

 
These are the cheapest return flights from London to Southeast Asia found on KAYAK in the last 72 hours.
6/3Thu
1 stopAir China
19h 50mLHR-MNL
19/3Wed
1 stopAir China
24h 45mMNL-LHR
€451
6/3Thu
2 stopsAir China
23h 45mLHR-MNL
19/3Wed
1 stopAir China
24h 45mMNL-LHR
€469
12/3Wed
1 stopShenzhen Airlines
20h 30mLHR-MNL
29/3Sat
1 stopShenzhen Airlines
24h 05mMNL-LHR
€493
7/5Wed
1 stopShenzhen Airlines
20h 35mLHR-MNL
23/5Fri
1 stopShenzhen Airlines
23h 55mMNL-LHR
€496
16/4Wed
1 stopShenzhen Airlines
20h 35mLHR-MNL
2/5Fri
1 stopShenzhen Airlines
23h 55mMNL-LHR
€498
10/3Mon
2 stopsHainan Airlines
30h 05mLHR-BKK
27/3Thu
2 stopsHainan Airlines
29h 25mBKK-LHR
€510
21/5Wed
1 stopChina Southern
35h 30mLHR-HKT
5/6Thu
2 stopsChina Southern
31h 50mHKT-LHR
€564
17/2Mon
1 stopChina Southern
30h 25mLHR-BKK
5/3Wed
1 stopChina Southern
28h 55mBKK-LHR
€565
1/5Thu
1 stopVietnam Airlines
33h 10mLHR-BKK
11/5Sun
1 stopVietnam Airlines
24h 50mBKK-LHR
€753
1/5Thu
directVietnam Airlines
12h 30mLHR-SGN
20/5Tue
directVietnam Airlines
13h 20mSGN-LHR
€772

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Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from London to Southeast Asia found on KAYAK in the last 72 hours.
7/3Fri
1 stopShenzhen Airlines
38h 20mLHR-KUL
€391
3/3Mon
1 stopShenzhen Airlines
22h 20mLHR-KUL
€392
7/3Fri
1 stopSingapore Airlines
24h 50mLHR-BKK
€405
17/6Tue
1 stopAir China
37h 30mLHR-BKK
€409
26/5Mon
1 stopSingapore Airlines
24h 00mLHR-BKK
€411
17/6Tue
2 stopsAir China
22h 30mLHR-BKK
€453
13/3Thu
2 stops
22h 05mLHR-DPS
€465
23/4Wed
2 stops
21h 55mLHR-DPS
€470
31/3Mon
2 stopsVietnam Airlines
33h 25mLHR-BKK
€594
31/3Mon
2 stopsVietnam Airlines
33h 25mLHR-BKK
€598

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Last minute flights from Heathrow to Southeast Asia

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from London to Southeast Asia that are departing in the next 10 days.
27/1Mon
multi-stopShenzhen Airlines
22h 20mLHR-KUL
14/2Fri
multi-stopShenzhen Airlines
30h 40mKUL-LHR
€616
27/1Mon
multi-stopShenzhen Airlines
21h 10mLHR-SGN
22/2Sat
multi-stopShenzhen Airlines
23h 50mSGN-LHR
€617
27/1Mon
multi-stopChina Eastern
42h 30mLHR-KUL
4/2Tue
multi-stopChina Eastern
28h 20mKUL-LHR
€660
27/1Mon
multi-stopShenzhen Airlines
21h 10mLHR-SGN
1/3Sat
multi-stopShenzhen Airlines
23h 50mSGN-LHR
€681
27/1Mon
multi-stopQatar Airways
17h 35mLHR-KUL
11/2Tue
multi-stopQatar Airways
19h 40mKUL-LHR
€720
26/1Sun
multi-stopQatar Airways
17h 35mLHR-KUL
11/2Tue
multi-stopQatar Airways
27h 30mKUL-LHR
€723
26/1Sun
multi-stopSAUDIA
19h 50mLHR-MNL
25/6Wed
multi-stopSAUDIA
22h 50mMNL-LHR
€740
26/1Sun
multi-stopSAUDIA
27h 00mLHR-MNL
23/6Mon
multi-stopSAUDIA
22h 50mMNL-LHR
€745
26/1Sun
multi-stopVietnam Airlines
35h 35mLHR-SGN
12/2Wed
directVietnam Airlines
14h 00mSGN-LHR
€1,136
27/1Mon
directVietnam Airlines
12h 05mLHR-SGN
2/3Sun
multi-stopVietnam Airlines
39h 15mSGN-LHR
€1,155

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Everything you need to know for your flight to Southeast Asia

Information on your arrival and departure airports

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