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Cheap flights from London, ON to Southeast Asia from C$ 587

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 14/10. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — BKK
6 Sep — 13 Sep1
1 adult

Cheap 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 1 September 2025.

Round-trip from

C$ 1,360

One-way from

C$ 587
Air Canada
  • Air Canada
  • 25/9-29/9
  • 4 total stops
  • 78h 02m total
  • London to Southeast Asia
Search Deals
14/10
  • 14/10
  • 3 total stops
  • 53h 15m total
  • London to Southeast Asia
Search Deals

Find flight deals from London to Southeast Asia

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 1 September 2025.

Thu 25/96:10 a.m.YXU - MNL
2 stops36h 10mAir Canada
Mon 29/99:25 a.m.MNL - YXU
2 stops41h 52mAir Canada
Deal found 29/8C$ 1,360
Thu 25/93:50 p.m.YXU - MNL
2 stops26h 05mUnited Airlines
Mon 29/98:40 a.m.MNL - YXU
2 stops36h 39mUnited Airlines
Deal found 30/8C$ 1,473
Sun 28/96:10 a.m.YXU - SIN
2 stops48h 15mUnited Airlines
Thu 2/108:40 p.m.SIN - YXU
2 stops24h 37mUnited Airlines
Deal found 29/8C$ 1,499
Sat 6/125:40 p.m.YXU - SIN
2 stops61h 35mUnited Airlines
Tue 30/1210:10 a.m.SIN - YXU
2 stops48h 11mUnited Airlines
Deal found 30/8C$ 1,642
Sat 13/93:50 p.m.YXU - BKK
2 stops44h 20mMultiple Airlines
Sat 27/911:50 p.m.BKK - YXU
2 stops44h 29mMultiple Airlines
Deal found 30/8C$ 1,682
Sat 6/129:25 a.m.YXU - SIN
2 stops56h 35mAir Canada
Sun 28/1210:20 p.m.SIN - YXU
2 stops47h 26mAir Canada
Deal found 30/8C$ 1,700
Sat 6/125:40 p.m.YXU - SIN
2 stops61h 35mUnited Airlines
Sun 28/1210:20 p.m.SIN - YXU
2 stops36h 01mUnited Airlines
Deal found 30/8C$ 1,708
Sat 6/125:45 a.m.YXU - BKK
2 stops36h 45mAir Canada
Mon 29/128:15 a.m.BKK - YXU
2 stops49h 06mAir Canada
Deal found 30/8C$ 1,711
Sat 6/125:45 a.m.YXU - BKK
3 stops41h 40mUnited Airlines
Wed 31/124:55 p.m.BKK - YXU
3 stops40h 26mUnited Airlines
Deal found 30/8C$ 1,723
Tue 14/106:15 a.m.YXU - BKK
3 stops30h 35mMultiple Airlines
Tue 21/1012:30 p.m.BKK - YXU
3 stops27h 42mMultiple Airlines
Deal found 30/8C$ 1,729
Mon 8/125:45 a.m.YXU - SIN
2 stops36h 10mAir Canada
Sun 28/1211:10 p.m.SIN - YXU
2 stops54h 55mAir Canada
Deal found 30/8C$ 1,759
Sat 6/125:45 a.m.YXU - BKK
2 stops36h 45mAir Canada
Sun 28/128:15 a.m.BKK - YXU
2 stops25h 06mAir Canada
Deal found 30/8C$ 1,762

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 1 September 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

LondonManila

YXU - MNL

YXUMNL

London

Thu 25/9

6:10 a.m.-6:20 a.m.

2 stops36h 10m

Manila Ninoy Aquino Intl

Mon 29/9

9:25 a.m.-3:17 p.m.

2 stops41h 52m

C$ 1,360

LondonManila

YXU - MNL

YXUMNL

London

Thu 25/9

3:50 p.m.-5:55 a.m.

2 stops26h 05m

Manila Ninoy Aquino Intl

Mon 29/9

8:40 a.m.-9:19 a.m.

2 stops36h 39m

C$ 1,473

LondonSingapore

YXU - SIN

YXUSIN

London

Sun 28/9

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

2 stops48h 15m

Singapore Changi

Thu 2/10

8:40 p.m.-9:17 a.m.

2 stops24h 37m

C$ 1,499

LondonSingapore

YXU - SIN

YXUSIN

London

Sat 6/12

5:40 p.m.-8:15 p.m.

2 stops61h 35m

Singapore Changi

Mon 29/12

10:10 a.m.-9:21 p.m.

2 stops48h 11m

C$ 1,642

LondonSingapore

YXU - SIN

YXUSIN

London

Sun 7/12

5:45 a.m.-8:15 p.m.

2 stops49h 30m

Singapore Changi

Tue 30/12

10:10 a.m.-9:21 p.m.

2 stops48h 11m

C$ 1,642

LondonSingapore

YXU - SIN

YXUSIN

London

Sun 7/12

9:25 a.m.-8:15 p.m.

2 stops45h 50m

Singapore Changi

Mon 29/12

10:20 p.m.-9:21 p.m.

2 stops36h 01m

C$ 1,642

LondonSingapore

YXU - SIN

YXUSIN

London

Mon 8/12

9:25 a.m.-8:00 a.m.

2 stops33h 35m

Singapore Changi

Mon 29/12

10:10 a.m.-9:21 p.m.

2 stops48h 11m

C$ 1,642

LondonSingapore

YXU - SIN

YXUSIN

London

Sat 6/12

5:40 p.m.-8:15 p.m.

2 stops61h 35m

Singapore Changi

Tue 30/12

10:10 a.m.-9:21 p.m.

2 stops48h 11m

C$ 1,642

LondonBangkok

YXU - BKK

YXUBKK

London

Sat 13/9

3:50 p.m.-11:10 p.m.

2 stops44h 20m

Bangkok Suvarnabhumi

Sat 27/9

11:50 p.m.-9:19 a.m.

2 stops44h 29m

C$ 1,682

LondonSingapore

YXU - SIN

YXUSIN

London

Sat 6/12

9:25 a.m.-7:00 a.m.

2 stops56h 35m

Singapore Changi

Sun 28/12

10:20 p.m.-8:46 a.m.

2 stops47h 26m

C$ 1,700

Flights are sorted by cheapest round-trip flights first.

Deals found on 30/8

Showing 1-10 of 34 results
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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, Ontario to Southeast Asia?

Currently, September is the cheapest month in which you can book a flight from London, Ontario to Southeast Asia (average of C$ 921). Flying from London, Ontario to Southeast Asia in December is currently the most expensive (average of C$ 1,398). 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 26h 05m. Air Canada provides one of the quickest options available for as low as C$ 1,473. There are 13221 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 - Manila Ninoy Aquino Intl or London - Singapore Changi.

  • 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, September is the cheapest month in which you can book a flight from London, Ontario to Southeast Asia (average of C$ 921). Flying from London, Ontario to Southeast Asia in December is currently the most expensive (average of C$ 1,398). 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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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.

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Cheapflights helps you find that perfect flight to Southeast Asia from London by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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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! 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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