Cheap flights from London Heathrow Airport to Southeast Asia from £296
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 22/9. Fares are subject to change and may not be available on all flights or dates of travel.
Cheap flight deals from Heathrow to Southeast Asia
Keep the following information in mind while searching for Heathrow to Southeast Asia flight deals. Data was last updated 12 July 2025.
Round-trip from | £478 |
---|---|
One-way from | £296 |
Popular in | December |
Cheapest in | May |
Average price | £829 |
Find flight deals from Heathrow to Southeast Asia
Cheapest flights from Heathrow to Southeast AsiaExplore the most affordable flight options available from Heathrow to Southeast Asia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 July 2025.
Explore the most affordable flight options available from Heathrow to Southeast Asia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 July 2025.
Cheapflights Fare Finder
Customise your flight search to find flights from Heathrow 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 858,174 searches. Data last updated 12 July 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Southeast Asia that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
LondonSingapore
LHR - SIN
LHRSIN
London Heathrow
Fri 5/9
12:30-18:30
1 stop23h 00m
Singapore Changi
Sat 20/9
23:00-07:30
1 stop39h 30m
LondonSingapore
LHR - SIN
LHRSIN
London Heathrow
Wed 1/10
22:05-12:20
1 stop31h 15m
Singapore Changi
Tue 28/10
20:25-06:35
1 stop18h 10m
LondonSingapore
LHR - SIN
LHRSIN
London Heathrow
Sat 4/10
21:00-12:15
2 stops32h 15m
Singapore Changi
Mon 27/10
03:55-18:15
1 stop22h 20m
LondonSingapore
LHR - SIN
LHRSIN
London Heathrow
Mon 6/10
17:50-16:40
1 stop15h 50m
Singapore Changi
Sun 26/10
00:05-11:15
1 stop19h 10m
LondonSingapore
LHR - SIN
LHRSIN
London Heathrow
Tue 2/9
17:50-16:40
1 stop15h 50m
Singapore Changi
Sat 27/9
23:40-08:40
1 stop16h 00m
LondonSingapore
LHR - SIN
LHRSIN
London Heathrow
Fri 5/9
22:05-11:55
1 stop30h 50m
Singapore Changi
Sat 13/9
03:30-20:00
1 stop23h 30m
LondonSingapore
LHR - SIN
LHRSIN
London Heathrow
Sun 28/9
08:55-17:05
2 stops25h 10m
Singapore Changi
Wed 8/10
23:20-16:25
1 stop24h 05m
LondonBangkok
LHR - BKK
LHRBKK
London Heathrow
Thu 20/11
21:30-17:55
2 stops37h 25m
Bangkok Suvarnabhumi
Thu 18/12
18:55-18:15
1 stop30h 20m
LondonBangkok
LHR - BKK
LHRBKK
London Heathrow
Tue 9/9
21:05-13:35
1 stop34h 30m
Bangkok Suvarnabhumi
Fri 26/9
14:45-19:30
1 stop34h 45m
LondonBangkok
LHR - BKK
LHRBKK
London Heathrow
Mon 17/11
21:00-14:55
3 stops34h 55m
Bangkok Suvarnabhumi
Wed 3/12
01:55-17:30
1 stop22h 35m
Best time to book a flight from Heathrow to Southeast Asia
Have a flexible travel schedule? Discover the best time to fly to Southeast Asia from Heathrow with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from London Heathrow Airport to Southeast Asia
What is the cheapest month to book a flight from London Heathrow Airport to Southeast Asia?
Currently, May is the cheapest month in which you can book a flight from London Heathrow Airport to Southeast Asia (average of £718). Flying from London Heathrow Airport to Southeast Asia in December is currently the most expensive (average of £1,123). 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 LHR to YJX?
Find hourly flight availability from Heathrow 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 12 July 2025.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Heathrow Airport to Southeast Asia as you normally would.
Weekly flight availability from London Heathrow Airport to Southeast Asia
Explore weekly flight availability from Heathrow 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 12 July 2025.
The most flights from LHR to zzYJX are scheduled on a Monday (7 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (7 on average).
Reviews of airlines servicing Southeast Asia
Get insights into the airlines that provide service to Southeast Asia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Southeast Asia. Reviews last updated 12 July 2025.
Check out reviews from past customers who have flown with Hainan Airlines, Singapore Airlines, andAustrian Airlines from London Heathrow Airport to Southeast Asia to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Overall
Boarding
Comfort
Crew
Food
Entertainment
Reviews
Anonymous,Mar 2025
CAN - PEK
Overall
Boarding
Comfort
Crew
Food
Entertainment
Reviews
Anonymous,Mar 2025
CAN - PEK
Overall
Boarding
Comfort
Crew
Food
Entertainment
Reviews
Anonymous,Mar 2025
CAN - PEK
Overall
Boarding
Comfort
Crew
Food
Entertainment
Reviews
Anonymous,Mar 2025
CAN - PEK
Overall
Boarding
Comfort
Crew
Food
Entertainment
Reviews
Anonymous,Mar 2025
CAN - PEK
Related info for your journey
Find useful and relevant information for your journey from Heathrow to Southeast Asia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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 Heathrow to Southeast Asia
See prices for flight routes from nearby airports that may be better suited for you.
Top 10 airlines flying from Heathrow to Southeast Asia
Discover the top 10 airlines that operate flights from Heathrow 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 858,174 searches. Data last updated 12 July 2025.
Fly with Cheapflights
Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from Heathrow to Southeast Asia?
When you search for this flight from Heathrow 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 Heathrow 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 Heathrow.
Can Cheapflights find flights from Heathrow to Southeast Asia with no change fees?
Cheapflights does show flights with no change fees to all users. To see these options for flights from Heathrow to Southeast Asia, users can toggle the no change fees filter when performing a flight search.
Can Cheapflights notify me if prices for flights from Heathrow to Southeast Asia become cheaper?
Yes! Start tracking prices for Heathrow 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.