€339 Find Cheap Flights from London 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 London to Southeast Asia departing on 12/3. 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
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, 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 London

Cheapest return prices found by our users on KAYAK in the last 72 hours
Manila
Manila1 stop€531
Denpasar
Denpasar2 stops€578
Singapore
Singapore1 stop€541
Manila
Manila1 stop€531
Denpasar
Denpasar2 stops€578
Singapore
Singapore1 stop€541

Cheap Flights from London to Southeast Asia

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from London 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 London to Southeast Asia

Sun, 15 Feb - Fri, 6 Mar
Shenzhen Airlines Logo
21:10 - 01:50LHR-SGN
21h 40m1 stop
Shenzhen Airlines Logo
02:50 - 19:10SGN-LHR
23h 20m1 stop
€521Shenzhen Airlines
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Mon, 5 Jan - Sat, 17 Jan
Shenzhen Airlines Logo
21:10 - 01:50LHR-SGN
21h 40m1 stop
Shenzhen Airlines Logo
02:50 - 19:10SGN-LHR
23h 20m1 stop
€522Shenzhen Airlines
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Thu, 12 Mar - Thu, 19 Mar
China Southern Logo
22:00 - 14:30LHR-BKK
33h 30m1 stop
China Southern Logo
19:15 - 18:35BKK-LHR
54h 20m2 stops
€526China Southern
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Wed, 18 Feb - Mon, 2 Mar
Austrian Airlines Logo
14:50 - 15:30LHR-BKK
17h 40m1 stop
Austrian Airlines Logo
14:00 - 21:40BKK-LHR
14h 40m1 stop
€527Austrian Airlines
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Tue, 27 Jan - Sun, 8 Feb
Air China Logo
20:25 - 01:10LHR-SGN
21h 45m1 stop
Air China Logo
05:00 - 15:55SGN-LHR
17h 55m1 stop
€528Air China
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Mon, 9 Mar - Fri, 20 Mar
Air China Logo
17:40 - 00:05LHR-MNL
22h 25m1 stop
Air China Logo
02:55 - 19:40MNL-LHR
24h 45m1 stop
€531Air China
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Sat, 14 Mar - Sun, 22 Mar
China Southern Logo
22:00 - 10:10LHR-BKK
29h 10m1 stop
China Southern Logo
18:55 - 18:35BKK-LHR
30h 40m1 stop
€531China Southern
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Tue, 24 Feb - Thu, 28 May
Austrian Airlines Logo
19:25 - 15:30LHR-BKK
13h 05m1 stop
Austrian Airlines Logo
23:40 - 08:20BKK-LHR
14h 40m1 stop
€534Austrian Airlines
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Thu, 30 Apr - Mon, 8 Jun
Multiple Airlines Logo
17:50 - 14:10LHR-BKK
14h 20m1 stop
Multiple Airlines Logo
12:50 - 21:45BKK-LHR
14h 55m1 stop
€535Multiple Airlines
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Tue, 28 Apr - Sun, 10 May
Multiple Airlines Logo
17:50 - 14:10LHR-BKK
14h 20m1 stop
Multiple Airlines Logo
23:40 - 08:20BKK-LHR
14h 40m1 stop
€537Multiple Airlines
Find Deal
Booking Insights

KAYAK's insights & trends for London to Southeast Asia flights

Get data-powered insights and trends into flights from London to Southeast Asia to help you find the cheapest flights, the best time to fly, and much more.

What is the cheapest London 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 found in the last 72 hours was to Bangkok, at €565 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 €640.

Can I save money by flying with a stopover from London 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 €397, prices are generally cheapest when you fly direct.

What is the cheapest month to fly from London 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 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 to Southeast Asia is May, when tickets cost €461 (return) on average. On the other hand, the most expensive months are December and July, when the average cost of return tickets is €1,010 and €971 respectively.

How far in advance should I book a flight from London 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 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 to Southeast Asia, you should book around 7 weeks before departure, which saves you about 10% compared to booking last-minute. For the absolute cheapest price, our data suggests you should book 16 weeks before departure.

Good to know

Low seasonJune
Best time to beat the crowds (10% less expensive on average)
Most popular time to fly (32% more expensive on average)

Flights from London to Southeast Asia: the best tips from KAYAK users

Insights shared by verified travellers who flew the route from London 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

  • What airport should I fly to visit Mount Bromo in Indonesia?

    If you want to marvel this spectacular mountainscape of Bromo you need to fly into the Surabaya Juanda International Airport (SUB). There are no direct flights from London, but you can stop over at multiple destinations. From the airport you can either book with a travel guide or drive the 2-3 hour journey on the Surabaya-Pasuruan-Wonokitri-Mt Bromo route.

  • Can I sleep at the Noi Bai International Airport (HAN)?

    You can sleep overnight at the Noi Bai International Airport in their special sleeping pods for passengers who want a quick rest after a long flight. The pods are private and offer free Wi-Fi, comfy mattresses, and refreshments, and are located within the airport terminals.

  • Which airport do I fly into to visit Mui Ne?

    Southeast Asias best new beach destination is only a few hours from Ho Chi Minh City. You would need to fly into the Vietnam Tan Son Nhat International Airport (SGN) in the city and then find the best transport for your next step of the journey. You can hire a travel guide or your own car rental for this leg of the journey.

  • Which airport should I fly into to visit the Buddhist monuments of Bagan?

    You need to fly into Nyaung-U Airport (NYU) to access the Bagan Monuments. The flight will need a layover. This is the main airport that serves as the aerial gateway to the Bagan region.  

  • How does KAYAK find such low prices on flights from London 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 to Southeast Asia.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London to Southeast Asia?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from London 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 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 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 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 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 €685 on average. Morning departures are around 22% more expensive than evening flights, on average. The most expensive time of day to fly to Southeast Asia is generally at night, which is peak travel time and where the average cost of a ticket is €858.

Top tips for finding cheap flights to Southeast Asia

  • If you are flying from London to Southeast Asia, you will fly from one of the four main London Airports Heathrow (LGW), London City (LCY), and London Stansted (STN) or Gatwick (GTW). As the flight is a long-haul flight you should arrive at the airport 3 hours in advance and you can choose to make use of one of the many Business and VIP Lounges available to you. This is a good idea for some relaxation time and a good meal to prepare you for your onward journey.
  • If your journey from London stops at Singapore Airport Changi (SIN), you can make use of the BeRelax Spa to recover from your long flight. The spa is found at the airport and offers essential wellness and relaxation services like massages, facials and much more. This is the perfect after-flight treat to prepare you for your onward journey.
  • Depending on what destination in Southeast Asia you are flying to, there are multiple routes, stopovers and options, and if you are flying to one of the more remote islands you will probably need to have a connecting flight to the venue. The most popular airlines connecting visitors to Southeast Asia are Singapore Airlines, Etihad, Austrian Airlines, Malaysia Airlines and more. It all depends on your route and destination so click through KAYAK to find your best route.
  • If you are flying into Bangkok (BKK) and want to get a good night's rest after your long-haul flight there is a hotel at the airport grounds. The Novotel Bangkok Airport Hotel is connected to the airport terminal by a walkway and is easily accessible. You can also choose to use the hotel for a business meeting.
  • If you are flying from London into Kuala Lumpur International Airport (KUL), this is one of Southeast Asia’s busiest aviation hubs. After a long-haul flight you might need to relax and have a smoke, so you can luckily find designated smoking lounges at the Satellite Building located at the Mezzanine level 2, South Zone next to the China Air’s Lounge and North Zone next to Singapore Airlines Lounge.

Reviews of the top airline flying from London 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 London 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.
7.2
Air ChinaOverall score based on 123 reviews
6.4Entertainment
7.6Boarding
7.9Crew
7.0Comfort
7.0Food
Airline reviews

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

4.0 OkayAnonymous, Nov 2025PVG - SIN
Read more Air China reviews

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.

Communication between the captain/crew and the passengers needs to be improved.

Food and service are good. Bathroom was lack of lotions and cleaning. That should be improved.

Food & service very good next I will pick up again

Chinese flight attendants didn't speak english well. They didn't care enough to remember that I (east asian who isn't Chinese) wasn't Chinese and spoke English. Announcement in english on board was poor and I find it very difficult to understand what was announced. Also, a cabin bag allows only 5kg!

Everything you need to know for your flight to Southeast Asia

Cabin class types available on flights to London

Cabin classes available on flights to London. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.