RM 1,445 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 21/9. 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

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

Best Southeast Asia Flight Deals from Heathrow

Cheapest return prices found by our users on KAYAK in the last 72 hours
Kuala Lumpur
Kuala Lumpur2 stopsRM 2,735
Kota Kinabalu
Kota Kinabalu1 stopRM 2,302
Kuching
Kuching2 stopsRM 3,525
Penang
Penang2 stopsRM 3,251
Langkawi
Langkawi2 stopsRM 2,861
Johor Bahru
Johor Bahru2 stopsRM 3,369
Miri
Miri2 stopsRM 4,289
Sandakan
Sandakan2 stopsRM 5,474
Kuala Lumpur
Kuala Lumpur2 stopsRM 2,735
Kota Kinabalu
Kota Kinabalu1 stopRM 2,302
Kuching
Kuching2 stopsRM 3,525
Penang
Penang2 stopsRM 3,251
Langkawi
Langkawi2 stopsRM 2,861
Johor Bahru
Johor Bahru2 stopsRM 3,369
Miri
Miri2 stopsRM 4,289
Sandakan
Sandakan2 stopsRM 5,474

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

Tue, 18 Nov - Mon, 1 Dec
China Southern Logo
22:00 - 18:00LHR-BKI
36h 00m1 stop
China Southern Logo
19:05 - 18:35BKI-LHR
31h 30m1 stop
RM 2,302China Southern
Find Deal
Tue, 18 Nov - Wed, 3 Dec
China Southern Logo
22:00 - 18:00LHR-BKI
36h 00m1 stop
China Southern Logo
19:05 - 18:35BKI-LHR
31h 30m1 stop
RM 2,701China Southern
Find Deal
Sat, 28 Feb - Wed, 18 Mar
Air China Logo
21:35 - 17:45LHR-KUL
36h 10m1 stop
Air China Logo
18:45 - 17:50KUL-LHR
31h 05m2 stops
RM 2,747Air China
Find Deal
Sat, 15 Nov - Thu, 27 Nov
Air China Logo
21:35 - 17:45LHR-KUL
36h 10m1 stop
Air China Logo
18:45 - 17:50KUL-LHR
31h 05m2 stops
RM 2,752Air China
Find Deal
Mon, 13 Oct - Tue, 28 Oct
Singapore Airlines Logo
11:25 - 14:25LHR-PEN
20h 00m1 stop
Singapore Airlines Logo
17:45 - 05:55PEN-LHR
20h 10m1 stop
RM 3,588Singapore Airlines
Find Deal
Sun, 4 Jan - Wed, 4 Feb
British Airways Logo
20:40 - 20:00LHR-LGK
15h 20m1 stop
British Airways Logo
18:25 - 05:25LGK-LHR
19h 00m1 stop
RM 3,730British Airways
Find Deal
Fri, 16 Jan - Wed, 11 Feb
British Airways Logo
20:40 - 10:05LHR-LGK
29h 25m1 stop
British Airways Logo
18:25 - 05:25LGK-LHR
19h 00m1 stop
RM 3,735British Airways
Find Deal
Wed, 14 Jan - Sat, 14 Mar
Singapore Airlines Logo
10:40 - 21:25LHR-KCH
26h 45m1 stop
Singapore Airlines Logo
22:25 - 15:20KCH-LHR
24h 55m1 stop
RM 4,255Singapore Airlines
Find Deal
Tue, 28 Oct - Tue, 4 Nov
Malaysia Airlines Logo
21:25 - 09:00LHR-JHB
27h 35m1 stop
Malaysia Airlines Logo
19:25 - 05:35JHB-LHR
18h 10m1 stop
RM 4,281Malaysia Airlines
Find Deal
Wed, 14 Jan - Sun, 15 Mar
Malaysia Airlines Logo
10:25 - 12:45LHR-KCH
18h 20m1 stop
Malaysia Airlines Logo
16:20 - 15:25KCH-LHR
31h 05m1 stop
RM 4,381Malaysia Airlines
Find Deal
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 Singapore, at RM 3,659 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 RM 3,659.

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 RM 2,215, 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 RM 3,151 (return) on average. On the other hand, the most expensive months are July and December, when the average cost of return tickets is RM 4,810 and RM 4,621 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 Wednesday and avoid Sundays if you are looking for the best rates. For your return to London Heathrow Airport, you’ll find the best rates on Wednesdays and the most expensive ones on Saturdays.

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 12% compared to booking last-minute. For the absolute cheapest price, our data suggests you should book 19 weeks before departure.

Good to know

Low seasonSeptember
Cheapest flightRM 1,445
Best time to beat the crowds (12% less expensive on average)
Most popular time to fly (32% more expensive on average)
Flight from London Heathrow Airport to Kuala Lumpur Airport

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.
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.

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

    The cheapest time of day to fly to Southeast Asia is generally in the evening, when retur flights cost RM 879 on average. Morning departures are around 12% more expensive than evening flights, on average. The most expensive time of day to fly to Southeast Asia is generally in the afternoon, which is peak travel time and where the average cost of a ticket is RM 1,017.

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: Kuala Lumpur RM 2,775 one-way - RM 3,845 round-trip

Reviews of the top 3 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.
8.1
Singapore AirlinesOverall score based on 1365 reviews
8.0Comfort
7.7Food
8.2Boarding
8.6Crew
8.0Entertainment
Airline reviews

The business class seats were very uncomfortable. When in lie flat position my legs were very restricted.

4.0 OkayRobert, Aug 2025SIN - SYD
Read more Singapore Airlines reviews

The business class seats were very uncomfortable. When in lie flat position my legs were very restricted.

Headwind delayed our flight which wasn’t the airlines fault

Food from Surabaya was below average but from Singapore is much better

The usual excellent experience with Singapore Airlines. The airplane was on time and actually early to Haneda Airport. The onboarding experience was pleasant with no delays, perhaps owing to the fact that the flight was not full. Nevertheless, the air crew were their usual outstanding standards in serving the passengers.

Horrendous. We upgraded and they took the money but cancelled one of our tickets. The recline action didn’t work on the seats for the flight from Singapore to London, pre booked meals but they seemed to have disappeared as well.. Phone customer service was horrendous. Took 5 phone calls and no fix. Craig at the airport was the only one who seemed to be able to get the ticket back.

Excelent service and plenty of food and drinks during the flight. Flight crew very attentive to our needs. Leg room between rows are very disappointing.

Construction at PDX resulting in very lung walk from the rental car to the gate. SFO, extremely long walk between terminals to get to connecting Singapore airlines flight. My smart watch recorded a total of 3 miles.

Loved the airline with the exception of their carry on limitations. They enforce a strict 7 kilo limit for carry on baggage which is ridiculous. We traveled from SFO to SIN with carry on with no difficulty yet when we checked in Delhi they forced us to check the carry on bags. The weight of our carry on bags were 11 and 12 kilos and while they exceeded the limitations set by Singapore Airlines they were well under weight limitations set by may other carriers. Interestingly my wife and I were each allowed two 22 KG bags to check in addition to the 7 kg carry on for a total weight of 102 KG's. Our total weight with the one bag we planned to check and our two carry ons was 46 kgs.

Crew and service was excellent, but passengers should be offered a welcome drink before take off which did not happen. Food was very good. Unfortunately the lie-flat bed in business class was one of the most uncomfortable I have experienced. The configuration forces you to sleep with your legs at an angle instead of in a straight line, plus there is very little padding on the bed so it wasn't possible to sleep for more than 2-3 hours on an 18 hour flight. For what the airlines charges for a business class ticket their hard product leaves a lot to be desired.

So happy I flew with Singapore Airlines. The customer service is top notch. I am terrified of flying and the staff made me feel so at ease. Will only fly Singapore internationally moving forward.

We are row 11, when the crew came to us, only one meal choice was available.

OK seats comfortable, easy boarding/embarking, excellent connection to domestic Malaysia flight with baggage checked through without customs. Catering especially drinks borderline ok luckily less important aspect

Comfortable seats in economy, managed a few hours sleep in an o night flight but the food was terrible. Surprising as Malaysia airlines has been good in the past. Service was mediocre this time too.

Vast improvement needed in customer service. I couldn’t get the drink of my choice during both meals (i.e. sparking water and Diet Coke). I had used plastic cups falling onto me from the tray. No eye contact when they thank you on the way out signalling an insincere thank you.

Jia yung was the flight attendant that made this a miserable flight.

The flight isn’t great, as the plane has faulty with light and noise. It blinks and make noise for 8hrs non stop! Causing health and sensory issues! Causing Hazard matter to all 3 babies that on bassinet seats. This matters affected 12 passengers and the most horrible flight I ever experience. Have been flying with MAS for more 30yrs and this is the worst! Very disappointed

AC not working, just slowly blowing room temperature air. Long taxi time does not help as well. Sweating all over the whole trip.

Did not take as cancelled 3 time so took another airline

It was a 2-hour flight so they didn't have much time for serving food. There was some turbulence so they could not serve hot coffee or tea for the safety reason. Good service, good tasting food, nice plane, a little bit of delay.

The IFE is quite unconvenient if using our own device. Not all passenger brought their own earphone/headphone.

what would have been better would have been that my booking not been canceled by the system and had I been informed that the booking had been cancelled by the system I could have immediately rebooked and not found out that there was an issue when I was told by the system that I needed to book in. It would have also been good if either the booking agent or BA or anyone been in anyway useful. In the end I had to rebook a flight at an additional cost of $350. So no I'm not impressed by BA any of the other parties involved.

Boarding was poor. Why are first class passengers not boarded first?! Bus to the plane and then held on a packed bus because we were waiting for people on the bus before to finish boarding. Seat belt on the fist clas seat is very uncomfortable, cutting into your neck. Other than that crew, seating and food were all excellent. Entertainment, as usual - rubbish.

The flight was fine but no food available apart from snacks like Pringles and olives which was a problem for me as I hadn’t eaten anything that day. But the worst problem was BA left 24 suitcases in Heathrow as the flight was too full but didn’t tell anyone. So we waited for ages at Toulouse airport with no information and finally found out from the one member of staff in the baggage collection area who explained what had happened and apologised for no announcement being made but said that was their policy. Then BA contacted me today to say they have found my luggage and can deliver it to me on Tuesday - half way through my holiday!!!! So a friend has had to make a four hour round trip in his car to go and collect the luggage from the airport so we can get it today. A TOTAL SHAMBLES AND DISREGARD BY BA FOR THEIR PASSENGERS’ BEST INTERESTS.

Much much better than my previous times on British Airways the food was spot-on and the service was really genuine and attentive

Flight was delayed but my previous flight was as well so It worked to my advantage. This was my first time in first class. I don't think they ever stopped feeding us. The seating area was very spacious and comfortable. The attendants were wonderful, warm, friendly and very personable.

First time on BA but will fly with them from now on! Everything about the flight was superb!!!

Horrible experience. They broke the handle of my checked in suitcase and then refused pay for damages

We had a pretty good experience. Enjoyed both the flights. Crew was very good and helpful.

The flight was very delayed in taking off - which was out of control of the crew, but then the pilot worked hard so we only arrived about 30 minutes late. Everyone was very friendly and accommodating!

They issued seat assignments and sat my 2 year-old in the row behind me, separate from me and my daughter. Communication/ customer service was terrible. They told me to change it in London, then in London, they told me to talk to the cabin crew, then a supervisor came and stuck us in the back of the plane when we were supposed to be in row 25. Overall, they need to really work on their customer service. Additionally the food was terrible and they ran out of meals and didn’t have any kid options. To top it off there was no in-flight entertainment for the first hour of the trip.

Everything you need to know for your flight to Southeast Asia

Information on your arrival and departure airports

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