$357 Find Cheap Flights from London to Southeast Asia - Compare and Save

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 9/14. 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.
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Cheap Flights from London to Southeast Asia

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Singapore
Singapore1 stop$789
Phuket City
Phuket City1 stop$763
Krabi
Krabi1 stop$802
Singapore
Singapore1 stop$789
Phuket City
Phuket City1 stop$763
Krabi
Krabi1 stop$802

Book Cheap London to Southeast Asia Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip 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 round-trip flight deals from London to Southeast Asia

Tue, Sep 1 - Tue, Sep 29
Multiple Airlines Logo
12:35 pm - 1:35 pm
LGW
-
BKK
19h 00m
1 stop
Multiple Airlines Logo
6:50 am - 7:25 am
BKK
-
LGW
30h 35m
2 stops
$637Multiple Airlines
Thu, Oct 1 - Sat, Oct 17
China Eastern Logo
9:55 pm - 4:05 am
LGW
-
BKK
24h 10m
1 stop
China Eastern Logo
5:05 am - 6:40 am
BKK
-
LGW
31h 35m
1 stop
$638China Eastern
Mon, Aug 24 - Sat, Sep 5
Air China Logo
8:25 pm - 12:10 am
LHR
-
BKK
21h 45m
1 stop
Air China Logo
7:35 pm - 8:25 pm
BKK
-
LHR
30h 50m
1 stop
$638Air China
Tue, Sep 15 - Sun, Oct 11
Multiple Airlines Logo
9:20 am - 12:30 pm
LGW
-
BKK
21h 10m
2 stops
Multiple Airlines Logo
6:50 am - 7:25 am
BKK
-
LGW
30h 35m
2 stops
$639Multiple Airlines
Mon, Nov 9 - Fri, Nov 13
Air China Logo
5:40 pm - 12:10 am
LHR
-
BKK
23h 30m
1 stop
Air China Logo
7:30 pm - 5:50 pm
BKK
-
LHR
29h 20m
1 stop
$640Air China
Fri, Oct 9 - Fri, Oct 23
Etihad Airways Logo
9:30 am - 11:50 pm
LHR
-
HKT
32h 20m
1 stop
Etihad Airways Logo
9:25 am - 6:45 pm
HKT
-
LHR
15h 20m
1 stop
$763Etihad Airways
Sun, Sep 13 - Tue, Sep 29
Etihad Airways Logo
9:30 am - 12:30 pm
LHR
-
HKT
21h 00m
1 stop
Etihad Airways Logo
3:20 am - 6:45 pm
HKT
-
LHR
21h 25m
1 stop
$777Etihad Airways
Sun, Oct 4 - Thu, Oct 15
China Southern Logo
7:15 pm - 1:05 am
LHR
-
SGN
23h 50m
1 stop
China Southern Logo
2:35 am - 7:20 pm
SGN
-
LHR
22h 45m
1 stop
$787China Southern
Mon, Nov 2 - Mon, Nov 16
Singapore Airlines Logo
9:20 am - 6:15 am
LGW
-
SIN
12h 55mnonstop
Singapore Airlines Logo
2:30 am - 9:00 am
SIN
-
LGW
14h 30mnonstop
$793Singapore Airlines
Tue, Oct 20 - Sat, Nov 7
China Southern Logo
10:10 pm - 1:35 am
LHR
-
SGN
21h 25m
1 stop
China Southern Logo
2:40 am - 2:00 pm
SGN
-
LHR
18h 20m
1 stop
$799China Southern
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 5 days was to Phuket City, at $609 round-trip. The most popular route is from London Heathrow Airport (LHR) to Bangkok Suvarnabhumi Airport (BKK), and the cheapest round-trip airline ticket found on this route in the last 5 days was $998.

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

The average price for all round-trip flights from London 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 round-trip flights cost $1,149 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 $1,276.

Can I save money by flying with a layover from London to Southeast Asia?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $426, 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 November, when tickets cost $822 (return) on average. On the other hand, the most expensive months are December and July, when the average cost of round-trip tickets is $1,368 and $1,254 respectively.

What’s the cheapest day of the week to fly from London to Southeast Asia?

The average price of all round-trip flights from London to Southeast Asia clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to Southeast Asia on a Tuesday, as we generally find the cheapest rates on that day for this route. On the other hand, Friday is the most expensive day to fly from London to Southeast Asia. For your return ticket, we recommend flying on a Wednesday and avoiding Fridays for the best deals.

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 the flight from London to Southeast Asia, you should book around 4 weeks before departure, which saves you about 11% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 9 weeks before departure.

Good to know

Low season

September

Cheapest flight

$357
Best time to beat the crowds with an average 15% drop in price.
Most popular time to fly with an average 31% increase in price.
Flight from London Heathrow Airport to Phuket City

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

Insights shared by verified travelers who flew the route from London 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
Sep 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

  • 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 travelers 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 round-trip 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.

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.

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.