€401 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 23/3. 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 (28% 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 197 reviews
7.6Boarding
7.6Comfort
8.1Crew
6.8Food
6.3Entertainment
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
31h 55mLHR-BKK
21/3Fri
1 stopAir China
36h 50mBKK-LHR
€448
6/3Thu
1 stopAir China
19h 50mLHR-MNL
21/3Fri
1 stopAir China
24h 45mMNL-LHR
€467
9/3Sun
1 stopShenzhen Airlines
20h 30mLHR-MNL
22/3Sat
1 stopShenzhen Airlines
24h 15mMNL-LHR
€506
9/3Sun
1 stopShenzhen Airlines
20h 30mLHR-MNL
4/4Fri
1 stopShenzhen Airlines
23h 55mMNL-LHR
€507
10/3Mon
1 stopChina Southern
20h 00mLHR-BKK
23/3Sun
1 stopChina Southern
23h 05mBKK-LHR
€524
6/3Thu
1 stopChina Southern
34h 35mLHR-MNL
22/3Sat
2 stopsChina Southern
34h 00mMNL-LHR
€542
6/3Thu
1 stopChina Eastern
33h 40mLHR-KUL
9/3Sun
1 stopChina Eastern
20h 00mKUL-LHR
€547
2/3Sun
1 stopChina Eastern
21h 55mLHR-BKK
17/3Mon
1 stopChina Eastern
19h 00mBKK-LHR
€550
1/5Thu
directVietnam Airlines
12h 30mLHR-SGN
8/5Thu
directVietnam Airlines
13h 20mSGN-LHR
€804
1/5Thu
directVietnam Airlines
12h 30mLHR-SGN
20/5Tue
1 stopVietnam Airlines
23h 55mSGN-LHR
€813

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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.
23/3Sun
1 stopShenzhen Airlines
21h 10mLHR-SGN
€401
3/3Mon
1 stopShenzhen Airlines
38h 20mLHR-KUL
€401
14/5Wed
1 stopSingapore Airlines
22h 55mLHR-BKK
€403
14/5Wed
2 stops
21h 35mLHR-BKK
€404
2/5Fri
1 stopSingapore Airlines
25h 35mLHR-BKK
€412
7/3Fri
2 stopsSAUDIA
27h 00mLHR-MNL
€412
14/3Fri
1 stopSAUDIA
19h 50mLHR-MNL
€477
5/5Mon
2 stops
21h 55mLHR-DPS
€480
22/3Sat
directVietnam Airlines
12h 05mLHR-SGN
€562
27/3Thu
2 stopsVietnam Airlines
20h 45mLHR-BKK
€625

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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.
23/2Sun
multi-stopShenzhen Airlines
20h 30mLHR-MNL
20/3Thu
multi-stopShenzhen Airlines
24h 15mMNL-LHR
€506
23/2Sun
multi-stopShenzhen Airlines
20h 30mLHR-MNL
20/3Thu
multi-stopShenzhen Airlines
24h 15mMNL-LHR
€507
23/2Sun
multi-stopEtihad Airways
27h 00mLHR-KUL
26/3Wed
multi-stopEtihad Airways
17h 00mKUL-LHR
€641
23/2Sun
multi-stopEtihad Airways
14h 55mLHR-KUL
29/3Sat
multi-stopEtihad Airways
17h 00mKUL-LHR
€665
23/2Sun
multi-stopSAUDIA
17h 50mLHR-MNL
22/3Sat
multi-stopSAUDIA
23h 50mMNL-LHR
€683
23/2Sun
multi-stopSAUDIA
22h 45mLHR-MNL
22/3Sat
multi-stopSAUDIA
28h 35mMNL-LHR
€687
19/2Wed
multi-stopOman Air
27h 40mLHR-BKK
6/3Thu
multi-stopOman Air
29h 20mBKK-LHR
€702
19/2Wed
multi-stopOman Air
27h 40mLHR-BKK
30/3Sun
multi-stopOman Air
30h 00mBKK-LHR
€720
20/2Thu
multi-stopVietnam Airlines
26h 35mLHR-MNL
20/3Thu
multi-stopVietnam Airlines
32h 35mMNL-LHR
€1,613
20/2Thu
multi-stopVietnam Airlines
33h 20mLHR-MNL
20/3Thu
multi-stopVietnam Airlines
32h 35mMNL-LHR
€1,631

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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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