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Cheap flights from London to Southeast Asia from C$ 522

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 4/9. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BKK
2 Jun — 9 Jun1
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 3 May 2026.

Mon 7/911:35 a.m.
LGW
-
BKK
1 stop18h 55m
China Eastern
Thu 26/111:35 p.m.
BKK
-
LGW
1 stop31h 25m
China Eastern
Deal found 29/4C$ 800
Sun 20/911:35 a.m.
LGW
-
BKK
1 stop31h 05m
China Eastern
Mon 12/104:50 p.m.
BKK
-
LGW
1 stop28h 10m
China Eastern
Deal found 28/4C$ 802
Sun 6/911:35 a.m.
LGW
-
BKK
1 stop22h 15m
China Eastern
Tue 27/101:35 p.m.
BKK
-
LGW
1 stop31h 25m
China Eastern
Deal found 30/4C$ 803
Tue 8/96:00 p.m.
LGW
-
BKK
1 stop18h 05m
China Eastern
Tue 27/101:35 p.m.
BKK
-
LGW
1 stop31h 25m
China Eastern
Deal found 2/5C$ 805
Wed 18/115:00 p.m.
LGW
-
BKK
1 stop36h 20m
China Eastern
Fri 20/119:05 p.m.
BKK
-
LGW
2 stops40h 25m
China Eastern
Deal found 30/4C$ 809
Sat 6/64:15 p.m.
LHR
-
BKK
1 stop15h 30m
SAUDIA
Tue 9/63:25 p.m.
BKK
-
LHR
1 stop22h 05m
SAUDIA
Deal found 30/4C$ 811
Sat 6/64:15 p.m.
LHR
-
BKK
1 stop15h 30m
SAUDIA
Thu 18/63:25 p.m.
BKK
-
LHR
1 stop22h 05m
SAUDIA
Deal found 29/4C$ 813
Mon 14/96:00 p.m.
LGW
-
BKK
1 stop18h 05m
China Eastern
Sun 29/117:50 a.m.
BKK
-
LGW
2 stops29h 40m
China Eastern
Deal found 3/5C$ 814
Tue 22/911:35 a.m.
LGW
-
BKK
2 stops31h 45m
China Eastern
Sun 18/101:35 p.m.
BKK
-
LGW
1 stop23h 05m
China Eastern
Deal found 2/5C$ 815
Thu 28/510:10 p.m.
LHR
-
BKK
1 stop19h 55m
SAUDIA
Sat 13/63:25 p.m.
BKK
-
LHR
1 stop22h 05m
SAUDIA
Deal found 1/5C$ 817
Tue 22/911:35 a.m.
LGW
-
BKK
3 stops26h 15m
China Eastern
Sun 11/103:55 p.m.
BKK
-
LGW
3 stops53h 05m
China Eastern
Deal found 29/4C$ 819
Sun 3/510:10 p.m.
LHR
-
BKK
1 stop19h 55m
SAUDIA
Tue 16/63:25 p.m.
BKK
-
LHR
1 stop22h 05m
SAUDIA
Deal found 30/4C$ 822

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 3 May 2026.

Round-trip from

C$ 800

One-way from

C$ 522

Popular in

December

Cheapest in

November

Average price

C$ 1,121
China Eastern
  • China Eastern
  • 7/9-26/11
  • 2 total stops
  • 50h 20m total
  • London to Southeast Asia
Search Deals
China Eastern
  • China Eastern
  • 4/9
  • 1 total stop
  • 18h 55m total
  • London to Southeast Asia
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (C$ 87 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 66 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 3 May 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 - BKK

LHRBKK

London Heathrow

Wed 17/6

10:00 a.m.-1:45 p.m.

1 stop21h 45m

Bangkok Suvarnabhumi

Thu 2/7

3:25 p.m.-7:30 a.m.

1 stop22h 05m

C$ 919

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Mon 7/9

4:15 p.m.-1:45 p.m.

1 stop15h 30m

Bangkok Suvarnabhumi

Sun 27/9

3:25 p.m.-7:30 a.m.

1 stop22h 05m

C$ 1,050

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Thu 25/6

8:50 p.m.-6:25 p.m.

1 stop15h 35m

Phuket City

Mon 20/7

2:25 a.m.-3:05 p.m.

1 stop18h 40m

C$ 1,061

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sun 31/5

9:20 p.m.-10:15 p.m.

2 stops42h 55m

Bangkok Suvarnabhumi

Mon 8/6

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

2 stops32h 45m

C$ 1,067

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Sun 6/9

2:45 p.m.-12:05 p.m.

1 stop15h 20m

Phuket City

Fri 18/9

3:45 p.m.-12:45 p.m.

1 stop27h 00m

C$ 1,082

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Wed 27/5

9:20 p.m.-10:00 p.m.

1 stop18h 40m

Phuket City

Tue 9/6

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

2 stops29h 45m

C$ 1,084

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Wed 23/9

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

1 stop20h 05m

Bangkok Suvarnabhumi

Wed 14/10

3:15 a.m.-12:45 p.m.

1 stop15h 30m

C$ 1,089

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Tue 26/5

3:35 p.m.-2:15 p.m.

1 stop16h 40m

Phuket City

Sun 31/5

9:00 p.m.-8:00 a.m.

1 stop17h 00m

C$ 1,116

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Fri 29/5

11:35 a.m.-10:15 p.m.

3 stops28h 40m

Bangkok Suvarnabhumi

Fri 5/6

9:55 p.m.-3:00 p.m.

1 stop23h 05m

C$ 1,124

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Sat 16/5

11:35 a.m.-1:20 a.m.

2 stops31h 45m

Bangkok Suvarnabhumi

Wed 20/5

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

1 stop18h 50m

C$ 1,124

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/5

Showing 1-10 of 60 resultsSorted by cheapest first
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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

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 6 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.

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$ 1,101). Flying from London to Southeast Asia in December is currently the most expensive (average of C$ 1,869). 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 3 May 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 3 May 2026.

The most flights from LON to zzYJX are scheduled on a Saturday (9 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (5 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 15h 20m. Fly via Etihad Airways, China Eastern, or SAUDIA to get the fastest option. Airlines will cover a distance of 9896 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 - Manila Ninoy Aquino Intl 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 (78%), Air Canada (75%), EVA Air (73%).

  • What are the cheapest flights from London to Southeast Asia?

    While on average a flight from London to Southeast Asia is generally C$ 1,224, our data shows the cheapest flight currently is C$ 1,129. When looking at the most popular route, (London Gatwick - Bangkok Suvarnabhumi), you can expect to pay C$ 1,771 for that flight.

  • 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$ 1,101). Flying from London to Southeast Asia in December is currently the most expensive (average of C$ 1,869). 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

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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 Manila flights
Heathrow to Phuket City 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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