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Cheap flights from London to Southeast Asia from C$ 529

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 31/1. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BKK
17 Jan — 24 Jan1
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 18 December 2025.

Wed 31/128:50 a.m.LHR - HKT
1 stop26h 05mEtihad Airways
Tue 13/19:05 a.m.HKT - LHR
1 stop28h 35mEtihad Airways
Deal found 17/12C$ 1,071
Wed 31/128:50 a.m.LHR - BKK
1 stop31h 35mEtihad Airways
Tue 20/12:40 p.m.BKK - LHR
1 stop23h 00mEtihad Airways
Deal found 17/12C$ 1,120
Wed 31/128:50 a.m.LHR - BKK
1 stop31h 35mEtihad Airways
Fri 6/28:55 a.m.BKK - LHR
1 stop34h 10mEtihad Airways
Deal found 17/12C$ 1,135
Wed 31/128:50 a.m.LHR - BKK
1 stop31h 35mEtihad Airways
Thu 5/22:40 p.m.BKK - LHR
1 stop23h 00mEtihad Airways
Deal found 17/12C$ 1,157
Wed 31/128:50 a.m.LHR - BKK
1 stop31h 35mEtihad Airways
Sat 17/18:55 a.m.BKK - LHR
1 stop28h 45mEtihad Airways
Deal found 17/12C$ 1,172
Wed 31/128:50 a.m.LHR - BKK
1 stop31h 35mEtihad Airways
Mon 9/22:40 p.m.BKK - LHR
1 stop23h 00mEtihad Airways
Deal found 17/12C$ 1,178
Wed 31/128:55 p.m.LHR - BKK
1 stop19h 30mEtihad Airways
Wed 4/29:25 a.m.BKK - LHR
1 stop15h 45mEtihad Airways
Deal found 16/12C$ 1,179
Wed 31/128:50 a.m.LHR - BKK
1 stop31h 35mEtihad Airways
Mon 12/18:55 a.m.BKK - LHR
1 stop36h 35mEtihad Airways
Deal found 16/12C$ 1,189
Wed 31/128:55 p.m.LHR - BKK
1 stop19h 30mEtihad Airways
Tue 13/18:55 a.m.BKK - LHR
1 stop28h 45mEtihad Airways
Deal found 17/12C$ 1,196
Tue 30/128:50 a.m.LHR - BKK
1 stop26h 10mEtihad Airways
Mon 12/18:55 a.m.BKK - LHR
1 stop36h 35mEtihad Airways
Deal found 16/12C$ 1,200
Wed 31/128:50 a.m.LHR - BKK
1 stop31h 35mEtihad Airways
Sun 8/22:40 p.m.BKK - LHR
1 stop34h 30mEtihad Airways
Deal found 17/12C$ 1,212
Tue 30/124:15 p.m.LHR - HKT
1 stop23h 15mSAUDIA
Wed 14/13:15 p.m.HKT - LHR
1 stop23h 15mSAUDIA
Deal found 15/12C$ 1,243

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 18 December 2025.

Round-trip from

C$ 824

One-way from

C$ 529

Popular in

December

Cheapest in

May

Average price

C$ 1,718
British Airways
  • British Airways
  • 27/2-1/4
  • Nonstop
  • 25h 10m total
  • London to Southeast Asia
Search Deals
31/1
  • 31/1
  • 2 total stops
  • 34h 30m total
  • London to Southeast Asia
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (C$ 106 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 62 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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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 18 December 2025.
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

Sat 17/1

9:15 p.m.-4:05 p.m.

Nonstop11h 50m

Bangkok Suvarnabhumi

Wed 11/3

6:55 p.m.-5:55 a.m.

1 stop18h 00m

C$ 955

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Sat 17/1

9:15 p.m.-4:05 p.m.

Nonstop11h 50m

Bangkok Suvarnabhumi

Tue 17/3

6:55 p.m.-5:55 a.m.

1 stop18h 00m

C$ 955

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Sat 17/1

9:15 p.m.-4:05 p.m.

Nonstop11h 50m

Bangkok Suvarnabhumi

Mon 16/3

9:05 a.m.-5:55 a.m.

1 stop27h 50m

C$ 958

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Sat 2/5

10:15 p.m.-4:05 p.m.

Nonstop11h 50m

Bangkok Suvarnabhumi

Mon 11/5

7:40 p.m.-6:40 a.m.

1 stop17h 00m

C$ 991

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Sat 17/1

9:15 p.m.-4:05 p.m.

Nonstop11h 50m

Bangkok Suvarnabhumi

Fri 13/3

6:55 p.m.-5:55 a.m.

1 stop18h 00m

C$ 1,004

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Sun 3/5

11:25 a.m.-9:55 a.m.

1 stop16h 30m

Bangkok Suvarnabhumi

Tue 2/6

7:40 p.m.-6:55 a.m.

1 stop17h 15m

C$ 1,079

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Tue 20/1

9:25 p.m.-11:10 p.m.

1 stop18h 45m

Bangkok Suvarnabhumi

Sat 31/1

6:40 p.m.-3:25 p.m.

1 stop27h 45m

C$ 1,133

LondonManila

LHR - MNL

LHRMNL

London Heathrow

Sun 1/3

5:00 p.m.-7:00 p.m.

1 stop18h 00m

Manila Ninoy Aquino Intl

Wed 18/3

9:40 p.m.-12:15 p.m.

1 stop22h 35m

C$ 1,137

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Wed 21/1

8:55 p.m.-11:25 p.m.

1 stop19h 30m

Bangkok Suvarnabhumi

Sun 1/2

8:25 p.m.-6:10 p.m.

2 stops28h 45m

C$ 1,167

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Tue 20/1

8:55 p.m.-11:25 p.m.

1 stop19h 30m

Bangkok Suvarnabhumi

Sun 1/2

8:25 p.m.-6:10 p.m.

2 stops28h 45m

C$ 1,167

Flights are sorted by cheapest round-trip flights first.

Deals found on 17/12

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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, May is the cheapest month in which you can book a flight from London to Southeast Asia (average of C$ 617). Flying from London to Southeast Asia in July is currently the most expensive (average of C$ 947). 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 18 December 2025.

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 49% on your trip compared to booking a flight at noon.

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 18 December 2025.

The most flights from LON to zzYJX are scheduled on a Monday (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 11h 50m. Fly via British Airways, Malaysia Airlines, or SAUDIA 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: EVA Air (88%), Thai Airways (84%), Air Canada (80%).

  • 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, May is the cheapest month in which you can book a flight from London to Southeast Asia (average of C$ 617). Flying from London to Southeast Asia in July is currently the most expensive (average of C$ 947). 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 Phuket City flights
Heathrow to Manila flights

Top 3 airlines flying from London to Southeast Asia

Discover the top 3 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 18 December 2025.
AirlineCheapestAverageFlexibilityOn-time
Thai AirwaysCheapestC$ 742AverageC$ 1,543FlexibilityNo cancel feeOn-time77%
Search Thai Airways flights
Air ChinaCheapestC$ 768AverageC$ 827FlexibilityNo cancel feeOn-time67%
Search Air China flights
EVA AirCheapestC$ 1,245AverageC$ 1,336FlexibilityNo 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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