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Cheap flights from London to Southeast Asia from C$ 497

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 6/5. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BKK
6 Mar — 13 Mar1
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 4 February 2026.

Wed 27/510:00 p.m.
LHR
-
BKK
1 stop30h 00m
Hainan Airlines
Tue 2/611:05 a.m.
BKK
-
LHR
1 stop38h 25m
Hainan Airlines
Deal found 3/2C$ 751
Sun 12/411:35 a.m.
LGW
-
BKK
2 stops21h 20m
China Eastern
Sun 3/58:50 p.m.
BKK
-
LGW
2 stops39h 50m
China Eastern
Deal found 2/2C$ 753
Wed 20/56:25 p.m.
LGW
-
BKK
2 stops38h 30m
China Eastern
Fri 22/52:10 a.m.
BKK
-
LGW
1 stop18h 50m
China Eastern
Deal found 2/2C$ 757
Tue 14/411:35 a.m.
LGW
-
BKK
2 stops21h 20m
China Eastern
Sun 3/57:50 a.m.
BKK
-
LGW
3 stops28h 50m
China Eastern
Deal found 4/2C$ 758
Sun 7/611:35 a.m.
LGW
-
BKK
3 stops26h 15m
China Eastern
Mon 8/69:55 p.m.
BKK
-
LGW
1 stop23h 05m
China Eastern
Deal found 3/2C$ 759
Wed 11/310:30 a.m.
LGW
-
BKK
1 stop18h 50m
China Eastern
Sat 14/310:45 a.m.
BKK
-
LGW
1 stop34h 15m
China Eastern
Deal found 1/2C$ 765
Mon 16/310:30 a.m.
LGW
-
BKK
1 stop18h 50m
China Eastern
Thu 19/37:05 p.m.
BKK
-
LGW
1 stop18h 25m
China Eastern
Deal found 2/2C$ 766
Wed 18/29:00 p.m.
LHR
-
BKK
1 stop19h 55m
China Eastern
Fri 13/35:45 a.m.
BKK
-
LHR
1 stop18h 45m
China Eastern
Deal found 2/2C$ 768
Mon 9/39:00 p.m.
LHR
-
BKK
1 stop18h 25m
China Eastern
Sat 21/37:55 p.m.
BKK
-
LHR
1 stop28h 35m
China Eastern
Deal found 3/2C$ 769
Mon 16/310:30 a.m.
LGW
-
BKK
1 stop18h 50m
China Eastern
Thu 24/127:50 a.m.
BKK
-
LGW
3 stops37h 10m
China Eastern
Deal found 2/2C$ 776
Sun 15/39:00 p.m.
LHR
-
HKT
1 stop18h 45m
China Eastern
Tue 24/37:35 p.m.
HKT
-
LHR
3 stops52h 55m
China Eastern
Deal found 2/2C$ 777
Tue 17/29:00 p.m.
LHR
-
BKK
1 stop20h 55m
China Eastern
Sun 8/39:05 p.m.
BKK
-
LHR
2 stops27h 25m
China Eastern
Deal found 2/2C$ 777

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 4 February 2026.

Round-trip from

C$ 751

One-way from

C$ 497

Popular in

December

Cheapest in

May

Average price

C$ 1,145
Hainan Airlines
  • Hainan Airlines
  • 27/5-2/6
  • 2 total stops
  • 68h 25m total
  • London to Southeast Asia
Search Deals
China Eastern
  • China Eastern
  • 5/5
  • 1 total stop
  • 32h 20m total
  • London to Southeast Asia
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (C$ 79 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 54 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 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 4 February 2026.
Use the filters below to find and compare flights from London to Southeast Asia that are best for you.

Fly from

London

Fly to

Southeast Asia

Route

Depart

Return

Price

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Wed 11/3

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

1 stop18h 50m

Bangkok Suvarnabhumi

Sat 14/3

9:25 a.m.-2:00 p.m.

1 stop35h 35m

C$ 769

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sat 2/5

9:20 p.m.-4:05 a.m.

1 stop24h 45m

Bangkok Suvarnabhumi

Thu 21/5

5:05 a.m.-6:40 p.m.

1 stop19h 35m

C$ 792

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Tue 5/5

9:20 p.m.-12:40 a.m.

1 stop21h 20m

Bangkok Suvarnabhumi

Tue 19/5

5:05 a.m.-6:40 p.m.

1 stop19h 35m

C$ 792

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Wed 27/5

9:20 p.m.-12:40 a.m.

1 stop21h 20m

Bangkok Suvarnabhumi

Tue 2/6

3:55 p.m.-6:40 p.m.

2 stops32h 45m

C$ 802

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Wed 4/3

10:30 a.m.-3:55 p.m.

1 stop22h 25m

Bangkok Suvarnabhumi

Fri 29/5

11:50 a.m.-3:00 p.m.

1 stop33h 10m

C$ 835

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Mon 9/3

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

3 stops22h 35m

Bangkok Suvarnabhumi

Mon 16/3

7:05 p.m.-6:30 a.m.

1 stop18h 25m

C$ 841

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Mon 2/3

10:30 a.m.-8:10 p.m.

3 stops26h 40m

Bangkok Suvarnabhumi

Fri 3/4

4:50 p.m.-6:40 a.m.

1 stop19h 50m

C$ 841

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Thu 5/3

10:30 a.m.-2:55 p.m.

2 stops21h 25m

Bangkok Suvarnabhumi

Fri 29/5

2:10 a.m.-3:00 p.m.

1 stop18h 50m

C$ 844

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Wed 4/3

10:30 a.m.-10:35 p.m.

3 stops29h 05m

Bangkok Suvarnabhumi

Wed 27/5

2:10 a.m.-3:00 p.m.

1 stop18h 50m

C$ 844

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Sat 7/3

10:30 a.m.-8:10 p.m.

3 stops26h 40m

Bangkok Suvarnabhumi

Sun 15/3

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

1 stop25h 05m

C$ 845

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/2

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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$ 597). Flying from London to Southeast Asia in July is currently the most expensive (average of C$ 916). 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 4 February 2026.

When flying from London to Southeast Asia, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 4 February 2026.

The most flights from LON to zzYJX are scheduled on a Tuesday (10 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (8 on average).

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 18h 50m. Fly via China Eastern, Air India, or Oman Air 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 Heathrow - Bangkok Suvarnabhumi, London Gatwick - 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 (82%), EVA Air (80%), Air Canada (79%).

  • 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$ 597). Flying from London to Southeast Asia in July is currently the most expensive (average of C$ 916). 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

Top 2 airlines flying from London to Southeast Asia

Discover the top 2 airlines that operate flights from London to Southeast Asia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 4 February 2026.
AirlineCheapestAverageFlexibilityOn-time
Air ChinaCheapestC$ 761AverageC$ 820FlexibilityNo cancel feeOn-time67%
Search Air China flights
EVA AirCheapestC$ 1,234AverageC$ 1,324FlexibilityNo cancel feeOn-time74%
Search EVA Air 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.

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