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Cheap flights from London, ON to Southeast Asia from C$ 809

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 30/1. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — 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.

Best flights from London to Southeast Asia
Discover carefully curated flight deals from London to Southeast Asia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 18 December 2025.

Sat 17/15:40 p.m.YXU - BKK
3 stops53h 45mUnited Airlines
Wed 21/14:55 p.m.BKK - YXU
3 stops40h 26mUnited Airlines
Deal found 15/12C$ 1,426
Sat 17/19:50 a.m.YXU - BKK
2 stops32h 40mAir Canada
Wed 21/18:00 a.m.BKK - YXU
2 stops25h 21mAir Canada
Deal found 15/12C$ 1,586
Thu 22/15:10 a.m.YXU - SIN
2 stops50h 05mUnited Airlines
Mon 26/110:10 a.m.SIN - YXU
2 stops35h 36mUnited Airlines
Deal found 15/12C$ 1,426
Sun 26/45:40 p.m.YXU - BKK
2 stops42h 30mAir Canada
Thu 30/47:45 a.m.BKK - YXU
2 stops38h 58mAir Canada
Deal found 17/12C$ 1,609
Sun 17/56:00 a.m.YXU - MNL
2 stops35h 55mUnited Airlines
Thu 21/58:40 a.m.MNL - YXU
2 stops36h 13mUnited Airlines
Deal found 16/12C$ 1,966
Sun 26/45:10 a.m.YXU - BKK
3 stops41h 35mUnited Airlines
Thu 30/43:40 p.m.BKK - YXU
3 stops36h 53mUnited Airlines
Deal found 17/12C$ 2,005

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$ 1,426

One-way from

C$ 809
United Airlines
  • United Airlines
  • 17/1-21/1
  • 6 total stops
  • 94h 11m total
  • London to Southeast Asia
Search Deals
30/1
  • 30/1
  • 3 total stops
  • 38h 05m total
  • London to Southeast Asia
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 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

YXU - BKK

YXUBKK

London

Sat 17/1

5:40 p.m.-11:25 a.m.

3 stops53h 45m

Bangkok Suvarnabhumi

Wed 21/1

4:55 p.m.-9:21 p.m.

3 stops40h 26m

C$ 1,426

LondonSingapore

YXU - SIN

YXUSIN

London

Thu 22/1

5:10 a.m.-8:15 p.m.

2 stops50h 05m

Singapore Changi

Mon 26/1

10:10 a.m.-8:46 a.m.

2 stops35h 36m

C$ 1,426

LondonBangkok

YXU - BKK

YXUBKK

London

Sat 17/1

9:50 a.m.-6:30 a.m.

2 stops32h 40m

Bangkok Suvarnabhumi

Wed 21/1

8:00 a.m.-9:21 p.m.

2 stops25h 21m

C$ 1,586

LondonBangkok

YXU - BKK

YXUBKK

London

Sun 26/4

5:40 p.m.-11:10 p.m.

2 stops42h 30m

Bangkok Suvarnabhumi

Thu 30/4

7:45 a.m.-11:43 a.m.

2 stops38h 58m

C$ 1,609

LondonManila

YXU - MNL

YXUMNL

London

Sun 17/5

6:00 a.m.-5:55 a.m.

2 stops35h 55m

Manila Ninoy Aquino Intl

Thu 21/5

8:40 a.m.-8:53 a.m.

2 stops36h 13m

C$ 1,966

LondonBangkok

YXU - BKK

YXUBKK

London

Sun 26/4

5:10 a.m.-9:45 a.m.

3 stops41h 35m

Bangkok Suvarnabhumi

Thu 30/4

3:40 p.m.-5:33 p.m.

3 stops36h 53m

C$ 2,005

LondonManila

YXU - MNL

YXUMNL

London

Fri 30/1

7:30 a.m.-10:35 a.m.

3 stops38h 05m

C$ 809

LondonBangkok

YXU - BKK

YXUBKK

London

Sat 31/1

9:50 a.m.-11:25 a.m.

3 stops37h 35m

C$ 1,073

LondonBangkok

YXU - BKK

YXUBKK

London

Sat 31/1

9:50 a.m.-12:55 p.m.

2 stops39h 05m

C$ 1,589

Flights are sorted by cheapest round-trip flights first.

Deals found on 16/12

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, Ontario to Southeast Asia?

Currently, July is the cheapest month in which you can book a flight from London, Ontario to Southeast Asia (average of C$ 474). Flying from London, Ontario to Southeast Asia in June is currently the most expensive (average of C$ 1,330). 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.

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.

  • What airport do you fly from for flights from London to Southeast Asia?

    Located just 8.6 km from the city centre, London (YXU) is the airport most travellers will use when flying to Southeast Asia from London.

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

    A quick flight from London, Ontario to Southeast Asia can take about 32h 40m. United Airlines provides one of the quickest options available for as low as C$ 1,586. There are 13696 km between London, Ontario and Southeast Asia. This flight may include one or multiple stops.

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

    The most popular route from London, Ontario to Southeast Asia is London - Bangkok Suvarnabhumi. You may also consider London - Singapore Changi or London - Haiphong Catbi.

  • 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, Ontario to Southeast Asia?

    Currently, July is the cheapest month in which you can book a flight from London, Ontario to Southeast Asia (average of C$ 474). Flying from London, Ontario to Southeast Asia in June is currently the most expensive (average of C$ 1,330). 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

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Yes! Start tracking prices for London to Southeast Asia flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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