Find flights
Deals
When to book
FAQs

Cheap flights from London to Southeast Asia from C$ 554

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 13/11. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BKK
7 Sep — 14 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to Southeast Asia

Enter your travel dates to find the best prices.

Cheapest flights from London to Southeast Asia
Explore the most affordable flight options available from London to Southeast Asia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 August 2026.

Mon 14/910:20 a.m. -
1 stop20h 15m
Sun 20/910:35 p.m. -
1 stop22h 05m
Deal found 6/8C$ 867
Fri 13/119:10 p.m. -
1 stop31h 00m
Thu 26/112:20 a.m. -
1 stop23h 50m
Deal found 6/8C$ 872
Tue 3/119:00 p.m. -
1 stop18h 25m
Sun 15/117:55 p.m. -
1 stop28h 35m
Deal found 5/8C$ 874
Tue 24/1112:40 p.m. -
Nonstop11h 40m
Thu 3/122:50 p.m. -
Nonstop13h 15m
Deal found 4/8C$ 875
Tue 1/1210:30 a.m. -
1 stop31h 25m
Fri 22/14:50 p.m. -
1 stop20h 40m
Deal found 5/8C$ 877
Fri 6/119:10 p.m. -
1 stop21h 10m
Sun 22/112:20 a.m. -
1 stop23h 50m
Deal found 5/8C$ 877
Tue 27/1010:30 a.m. -
1 stop34h 35m
Sun 8/111:55 a.m. -
1 stop19h 05m
Deal found 7/8C$ 878
Wed 4/119:10 p.m. -
1 stop36h 45m
Tue 1/122:20 a.m. -
1 stop23h 50m
Deal found 7/8C$ 878
Fri 30/1010:30 a.m. -
1 stop18h 50m
Thu 12/111:55 a.m. -
1 stop19h 05m
Deal found 6/8C$ 879
Mon 9/119:10 p.m. -
1 stop21h 10m
Thu 26/115:55 p.m. -
1 stop32h 15m
Deal found 8/8C$ 879
Sat 31/105:00 p.m. -
1 stop17h 50m
Thu 19/111:35 p.m. -
1 stop23h 55m
Deal found 3/8C$ 881
Fri 13/119:10 p.m. -
1 stop21h 10m
Thu 26/115:55 p.m. -
1 stop32h 15m
Deal found 3/8C$ 881

Find flight deals from London to Southeast Asia

Keep the following information in mind while searching for London to Southeast Asia flight deals. Data was last updated 8 August 2026.

Round-trip from

C$ 867

One-way from

C$ 554

Popular in

December

Cheapest in

November

Average price

C$ 1,532
Condor
  • Condor
  • 14/9-20/9
  • 2 total stops
  • 42h 20m total
  • London to Southeast Asia
Search Deals
Shenzhen Airlines
  • Shenzhen Airlines
  • 13/11
  • 1 total stop
  • 36h 45m total
  • London to Southeast Asia
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (C$ 67 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 73 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from London to Southeast Asia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 8 August 2026.
Use the filters below to find and compare flights from London to Southeast Asia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonBangkok

LHR London Heathrow - BKK Bangkok Suvarnabhumi

LHRBKK

London Heathrow

Tue 20/10

10:00 p.m.-2:15 a.m.

1 stop22h 15m

Bangkok Suvarnabhumi

Thu 5/11

12:10 p.m.-7:10 p.m.

1 stop38h 00m

C$ 878

LondonBangkok

LGW London Gatwick - BKK Bangkok Suvarnabhumi

LGWBKK

London Gatwick

Thu 8/10

10:20 a.m.-12:35 p.m.

1 stop20h 15m

Bangkok Suvarnabhumi

Mon 19/10

10:35 p.m.-2:40 p.m.

1 stop22h 05m

C$ 891

LondonBangkok

LGW London Gatwick - BKK Bangkok Suvarnabhumi

LGWBKK

London Gatwick

Wed 20/1

10:30 a.m.-12:20 p.m.

1 stop18h 50m

Bangkok Suvarnabhumi

Sun 31/1

7:55 p.m.-2:00 p.m.

1 stop25h 05m

C$ 972

LondonBangkok

LGW London Gatwick - BKK Bangkok Suvarnabhumi

LGWBKK

London Gatwick

Fri 22/1

5:00 p.m.-5:50 p.m.

1 stop17h 50m

Bangkok Suvarnabhumi

Tue 26/1

1:55 a.m.-2:00 p.m.

1 stop19h 05m

C$ 972

LondonBangkok

LGW London Gatwick - BKK Bangkok Suvarnabhumi

LGWBKK

London Gatwick

Mon 25/1

5:00 p.m.-5:50 p.m.

1 stop17h 50m

Bangkok Suvarnabhumi

Thu 28/1

7:55 p.m.-2:00 p.m.

1 stop25h 05m

C$ 972

LondonBangkok

LGW London Gatwick - BKK Bangkok Suvarnabhumi

LGWBKK

London Gatwick

Wed 20/1

10:30 a.m.-12:20 p.m.

1 stop18h 50m

Bangkok Suvarnabhumi

Wed 27/1

4:50 p.m.-6:30 a.m.

1 stop20h 40m

C$ 972

LondonBangkok

LGW London Gatwick - BKK Bangkok Suvarnabhumi

LGWBKK

London Gatwick

Fri 22/1

5:00 p.m.-10:35 p.m.

2 stops22h 35m

Bangkok Suvarnabhumi

Sat 30/1

7:05 p.m.-2:00 p.m.

1 stop25h 55m

C$ 984

LondonBangkok

LGW London Gatwick - BKK Bangkok Suvarnabhumi

LGWBKK

London Gatwick

Sat 5/12

5:00 p.m.-2:05 a.m.

2 stops26h 05m

Bangkok Suvarnabhumi

Tue 2/3

3:55 p.m.-2:00 p.m.

2 stops29h 05m

C$ 997

LondonPhuket City

LHR London Heathrow - HKT Phuket City

LHRHKT

London Heathrow

Thu 10/9

9:45 p.m.-11:50 p.m.

1 stop20h 05m

Phuket City

Sat 12/9

3:20 p.m.-3:05 p.m.

1 stop29h 45m

C$ 1,096

LondonPhuket City

LHR London Heathrow - HKT Phuket City

LHRHKT

London Heathrow

Fri 4/12

1:55 p.m.-11:50 p.m.

1 stop26h 55m

Phuket City

Thu 17/12

2:40 a.m.-12:05 p.m.

1 stop16h 25m

C$ 1,111

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/8

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
6

Best time to book a flight from London to Southeast Asia

Have a flexible travel schedule? Discover the best time to fly to Southeast Asia from London with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London to Southeast Asia

What is the cheapest month to book a flight from London to Southeast Asia?

Currently, November is the cheapest month in which you can book a flight from London to Southeast Asia (average of C$ 1,139). Flying from London to Southeast Asia in December is currently the most expensive (average of C$ 1,908). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from LON to YJX?

Find hourly flight availability from London to Southeast Asia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 8 August 2026.

A simple way to save on the total cost of your ticket is to fly from London to Southeast Asia in the afternoon. If you’re flexible enough to do this you can expect to save up to 36% on your trip compared to booking a flight in the evening.

Weekly flight availability from London to Southeast Asia

Explore weekly flight availability from London to Southeast Asia. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 8 August 2026.

The most flights from LON to zzYJX are scheduled on a Tuesday (9 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (8 on average).

How far ahead should I book a flight from London to Southeast Asia?

The best time to book flights from London to Southeast Asia is 82 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Related info for your journey

Find useful and relevant information for your journey from London to Southeast Asia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from London to Southeast Asia?

    There are many flights that can get you from London to Southeast Asia in 17h 50m. Fly via China Eastern, Etihad Airways, or SWISS to get the fastest option. Airlines will cover a distance of 9563 km. This flight may include one or multiple stops.

  • What are the most popular routes from London to Southeast Asia?

    Most travellers choose London Gatwick - Bangkok Suvarnabhumi, London Heathrow - Bangkok Suvarnabhumi or London Heathrow - Phuket City when deciding on the best route from London to Southeast Asia.

  • What are the most reliable airlines from London to Southeast Asia?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from London to Southeast Asia on time: Thai Airways (87%), EVA Air (87%), Air Canada (83%).

  • Can I find deals for flights from London to Southeast Asia that include hotel bookings?

    Yes. In addition to deals on London to Southeast Asia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from London to Southeast Asia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Southeast Asia.

  • Can I find deals for business class flights from London to Southeast Asia?

    Yes. Cheapflights offers flight deals from London to Southeast Asia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from London to Southeast Asia?

    Currently, November is the cheapest month in which you can book a flight from London to Southeast Asia (average of C$ 1,139). Flying from London to Southeast Asia in December is currently the most expensive (average of C$ 1,908). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for London to Southeast Asia

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to New Delhi flights
Heathrow to Suvarnabhumi flights
Heathrow to Phuket City flights
Heathrow to Manila flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from London to Southeast Asia?

When you search for this flight from London to Southeast Asia, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from London to Southeast Asia?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Southeast Asia from London.

Can Cheapflights find flights from London to Southeast Asia with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from London to Southeast Asia flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from London to Southeast Asia become cheaper?

Yes, Cheapflights offers price alerts on London to Southeast Asia flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.