Cheap flights from London Heathrow Airport to Southeast Asia from $467
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London Heathrow Airport to Southeast Asia departing on 24/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Return
1 adult
Economy
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
Big names, great deals
Big names, great deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customise your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from London Heathrow Airport to Southeast Asia
Round-trip
One-way
Last minute
Direct
Cheap return flights
KAYAK's recommended return flight deals from the most popular airlines that fly from London Heathrow Airport to Southeast Asia.
Cheap one-way flights
Flying one-way? These are some of the best deals recently discovered on momondo for flights from London Heathrow Airport to Southeast Asia.
Cheap last-minute flights
Planning a quick getaway from London Heathrow Airport to Southeast Asia? These are the last-minute flight deals available now.
Cheap direct flights
If you prefer a non-stop journey, check out our latest direct flight deals to Southeast Asia, so you can enjoy a seamless trip without stopovers.
Austrian Airlines flights from London Heathrow Airport to Southeast Asia
Our best Austrian Airlines deals on London Heathrow Airport to Southeast Asia flight tickets
Austrian Airlines![Austrian Airlines]()
18 May![Austrian Airlines]()
26 May
LHR19:30London Heathrow
13h 20m
1 stop
BKK14:50Bangkok Suvarnabhumi
BKK23:40Bangkok Suvarnabhumi
15h 05m
1 stop
LHR08:45London Heathrow
Austrian Airlines![Austrian Airlines]()
17 Sept![Austrian Airlines]()
1 Oct
LHR10:25London Heathrow
26h 15m
2 stops
SIN19:40Singapore Changi
SIN20:50Singapore Changi
18h 30m
2 stops
LHR08:20London Heathrow
China Southern flights from London Heathrow Airport to Southeast Asia
Our best China Southern deals on London Heathrow Airport to Southeast Asia flight tickets
China Southern![China Southern]()
12 May![China Southern]()
20 May
LHR22:10London Heathrow
21h 20m
1 stop
BKK01:30Bangkok Suvarnabhumi
BKK15:55Bangkok Suvarnabhumi
33h 05m
1 stop
LHR19:00London Heathrow
China Southern![China Southern]()
13 May![China Southern]()
21 May
LHR22:10London Heathrow
21h 20m
1 stop
BKK01:30Bangkok Suvarnabhumi
BKK03:00Bangkok Suvarnabhumi
22h 00m
1 stop
LHR19:00London Heathrow
See travel insights to Southeast Asia from
How to get the cheapest flight ticket from London Heathrow Airport to Southeast Asia
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
Prices
Airlines
Other information
What is the cheapest month to fly to Southeast Asia?
The cheapest month to fly to Southeast Asia from London Heathrow Airport is in March. Flight prices, which tend to average around $1,486, are often lower during this time because this is during the off-season. The month of November is another great option to travel to Southeast Asia, with average flight prices from London Heathrow Airport averaging around $1,501.
What is the cheapest day to depart on your flight to Southeast Asia?
Our data shows that Sunday is the least expensive day to fly to Southeast Asia. Tickets to fly out on this day can be as low as $0. On the other hand, Thursday is the most expensive day to depart from London Heathrow Airport because it is more convenient for both business and leisure travellers. As a result, prices tend to be around $2,205.
What is the cheapest time of day to depart on your flight to Southeast Asia?
At midday is the cheapest time of day to fly from London Heathrow Airport to Southeast Asia when you can find flight prices for as low as $0. Flying to Southeast Asia at midday is an ideal time because this is during off-peak travel hours. Flights in the evening are often more expensive, with an average ticket price of $1,733.
What is the cheapest London Heathrow to Southeast Asia flight route?
Fly from London Heathrow to Singapore Changi for the best London Heathrow - Southeast Asia flight prices
How far in advance should I book a flight to Southeast Asia?
You are more likely to see cheaper flights to Southeast Asia from London Heathrow Airport when booking 21 weeks ahead of your departure date. In general, you can expect to find flights to Southeast Asia for around $1,743 when searching 21 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Southeast Asia from London Heathrow Airport for as low as $1,607 on momondo.
What cabin class options are available on London Heathrow to Southeast Asia flights?
There are 4 cabin classes available to choose from on London Heathrow to Southeast Asia flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from London Heathrow to Southeast Asia?
Singapore Airlines, Air India, and China Eastern are the most popular carriers operating from London Heathrow to Southeast Asia
Which airlines fly to Southeast Asia?
Thai Airways, Etihad Airways and China Eastern are the top three most popular airlines that fly to Southeast Asia from London Heathrow Airport according to our data. Thai Airways is the first choice among our users, with 36% of people opting to fly with this airline when travelling to Southeast Asia. Keep in mind that there are 5 different airlines that fly to Southeast Asia on a routine basis, so you have a few additional options to choose from.
How many flights depart from London Heathrow Airport to Southeast Asia on average per day?
As of April 2025, 51 flights take off from London Heathrow Airport and land in Southeast Asia each day. The most common flight departure time for this route is 20:00, with 65% of daily flights taking off in the evening.
How many flights depart from London Heathrow Airport to Southeast Asia on average per week?
The number of flights available between London Heathrow Airport and Southeast Asia is 360 per week as of April 2025. The most frequent departure day is Mon, with 14% of weekly flights leaving on this day.
Cheap London Heathrow Airport to Southeast Asia flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from London Heathrow Airport to Southeast Asia
Best price found | $467 |
|---|---|
Fastest flight time | 11h 35m |
Direct flights | Every day |
Airports in Southeast Asia | 5 airports |
When did momondo last update prices for flights from London Heathrow Airport to Southeast Asia?
Prices for flights from London Heathrow Airport to Southeast Asia are updated daily.
How many operators does momondo search for flights from London Heathrow Airport to Southeast Asia?
There are 2 operators available for flights from London Heathrow Airport to Southeast Asia as of April 2025.
How old do you have to be to fly from London Heathrow Airport to Southeast Asia?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London Heathrow Airport to Southeast Asia.
What documentation or ID do you need to fly to Southeast Asia?
The travel and health documents required for your trip to Southeast Asia can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Southeast Asia. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from London Heathrow Airport to Southeast Asia?
momondo data reveals that the most frequently booked plane model on the route from London Heathrow Airport to Southeast Asia is Airbus A350-1000, representing 17.82% of all bookings. The subsequent popular models are Boeing 787-9 Dreamliner at 17.41%, Boeing 777 at 14.64%, and Boeing 787-8 Dreamliner at 6.80%.
Best airlines flying from London Heathrow Airport to Southeast Asia
Compare and see reviews for airlines that fly from London Heathrow Airport to Southeast Asia with momondo
| Airline | Rating | Free cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $776 | Free cancellation | Rating 7.2 143 reviews | |||
| PriceFrom $895 | Free cancellation | Rating 7.2 86 reviews | |||
| PriceFrom $1,109 | Free cancellation | Rating 8.1 1,288 reviews | |||
| PriceFrom $1,216 | Free cancellation | Rating 7.7 323 reviews | |||
| PriceFrom $1,331 | Free cancellation | Rating 7.4 1,192 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from London to Southeast Asia?
To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Southeast Asia from London.
Can I find flights from London to Southeast Asia with flexible booking policies on momondo?
Yes. momondo enables you to select and highlight flights to Southeast Asia from London with this policy.
How can momondo help me find flights from London to Southeast Asia?
momondo provides multiple filters to help you find the best flight to Southeast Asia from London. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.
I’m not ready to book a flight from London to Southeast Asia right now. Can momondo alert me if prices change?
Price alerts on flights to Southeast Asia from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.
Get notified when prices go down
Daily price changes in your inbox - only with Price Alerts.
Find better results for your trip to Southeast Asia
Popular Cities in Southeast Asia
Popular flights according to clicks in the last 7 days on momondo
Look for other cheap flights to Londonfrom $1,217