₹ 34,838 Find Cheap Flights from London to Southeast Asia – Compare and Save

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Cheap Flights from Heathrow to Southeast Asia

Cheapest return prices found by our users on KAYAK in the last 5 days
Singapore
Singapore1 stop₹ 63,186
Denpasar
Denpasar2 stops₹ 77,980
Port Blair
Port Blair1 stop₹ 63,950
Manila
Manila1 stop₹ 54,596
Singapore
Singapore1 stop₹ 63,186
Denpasar
Denpasar2 stops₹ 77,980
Port Blair
Port Blair1 stop₹ 63,950
Manila
Manila1 stop₹ 54,596
Booking Insights

KAYAK's insights & trends for Heathrow to Southeast Asia flights

Get data-powered insights and trends into flights from Heathrow to Southeast Asia to help you find the cheapest flights, the best time to fly, and much more.

What is the cheapest London Heathrow Airport to Southeast Asia flight route?

The cheapest ticket to Southeast Asia from London Heathrow Airport found in the last 5 days was to Singapore, at ₹ 77,652 return. The most popular route is from London Heathrow Airport (LHR) to Singapore (SIN), and the cheapest return airline ticket found on this route in the last 5 days was ₹ 77,652.

What is the cheapest time of day to fly to Southeast Asia?

The cheapest time of day to fly to Southeast Asia is generally at night, when retur flights cost ₹ 120,849 on average. The most expensive time of day to fly to Southeast Asia is generally in the morning, which is peak travel time and where the average cost of a ticket is ₹ 147,978.

Can I save money by flying with a stopover from London Heathrow Airport to Southeast Asia?

No, with an average price for the route of ₹ 72,371, prices are generally cheapest when you fly direct.

What is the cheapest month to fly from London Heathrow Airport to Southeast Asia?

The cheapest month for flights from London Heathrow Airport to Southeast Asia is November, when tickets cost ₹ 79,794 (return) on average. On the other hand, the most expensive months are December and July, when the average cost of return tickets is ₹ 132,481 and ₹ 122,745 respectively.

What’s the cheapest day of the week to fly from London to Southeast Asia?

For London to Southeast Asia, Sunday is the cheapest day to fly on average and Thursday is the most expensive. Flying from Southeast Asia back to London, the best deals are generally found on Sunday, with Wednesday being the most expensive.

How far in advance should I book a flight from London Heathrow Airport to Southeast Asia?

To get a below-average price on a flight from London Heathrow Airport to Southeast Asia, you should book around 2 weeks before departure, which saves you about 6% compared to booking last-minute. For the absolute cheapest price, our data suggests you should book 9 weeks before departure.

Good to know

Low season

September

Cheapest flight

₹ 34,838
Best time to beat the crowds (10% less expensive on average)
Most popular time to fly (25% more expensive on average)
Flight from London to Singapore

Flights from Heathrow to Southeast Asia: the best tips from KAYAK users

Insights shared by verified travellers who flew the route from Heathrow to Southeast Asia 
MartinFlew with Singapore Airlines-Jan 2025
It’s a long time sitting in that seat so sit on a cushion!
Verified travelerFlew with Qantas Airways-Sept 2024
Unless you’re flying Business or First Class, definitely take your own travel pillow - they make a difference.
OmarFlew with Qantas Airways-May 2024
Qantas lounge was crowded. try other One World lounges
Verified travelerFlew with Singapore Airlines-Feb 2024
Flew with Singapore Airlines great experience and efficient transfer to next flight at Changi . Premium economy was worth the extra giving easier boarding and comfortable seats with more room.

FAQs - booking Southeast Asia flights

  • How does KAYAK find such low prices on flights from London to Southeast Asia?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from London to Southeast Asia.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London to Southeast Asia?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from London to Southeast Asia is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from London to Southeast Asia?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly from London to Southeast Asia with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London to Southeast Asia?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from London to Southeast Asia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Heathrow to Southeast Asia

 
Need help choosing which airline to fly with from Heathrow to Southeast Asia? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.6
Cathay PacificOverall score based on 1481 reviews
7.3Food
7.7Entertainment
8.1Crew
7.6Comfort
7.9Boarding
Airline reviews

For an international flight, the service was average at best. It could have been significantly better, particularly with regard to the food quality and options. Additionally, having only two restrooms available for the entire Economy Class made the experience less comfortable and resulted in long wait times.

4.0 OkayAnonymous, May 2026
Read more Cathay Pacific reviews

For an international flight, the service was average at best. It could have been significantly better, particularly with regard to the food quality and options. Additionally, having only two restrooms available for the entire Economy Class made the experience less comfortable and resulted in long wait times.

The crew, pilots and flight attendants were all amazing. What could be better is reinforcing that seats cannot be reclined at departure and landing. I had a person seated in front of me who had her seat all the way inclined, including during take-off - after the crew asked her to seat upright. Cathay Pacific should reinforce this safety request and perhaps penalize those who don't follow it. I felt very unsafe with this person limiting my space and perhaps putting my life in danger in the "unlikely" case of an emergency.

Flew from lax economy on cathay 777. Seat configuration 3-4-3. When the forward seat reclines it feels like someone is leaning forward and staring you. If you are slightly big tray tables will touch your abdomen even with seats upright. AVOID this above 777 configuration at all cost for a long flight. However their Airbus 350 3-3-3 configuration felt spacious and Seats wider.

Flight was delayed at the last minute for six hours. Instead of delaying it to a normal hour, they moved it to 10 pm to essentially make it a redeye. There was no compensation or benefit offered for this inconvenience. Once on the plane, Inpaid for WiFi twice with both times it not working because of a “weak WiFi signal”, according to the flight attendants. They also chose the farther possible gates in both airports from the entrance/exit, even though they were one of the few active flights left so late in the evening. Overall it was pretty horrible.

The crews were smiling all the time with soft tunes when they spoke; the food was excellent. Thank you!

As a solo traveller, I always prefer to have an aisle seat, but the flight was so full, there weren’t any available. I understand that the seatbelt sign sometimes has to go on if turbulence is anticipated but after the second food service, it was on continuously for about an hour and a half and there didn’t seem to be any turbulence at all! With seats reclined, my fellow passenger in the aisle seat asleep and the seatbelt sign on I felt very trapped, extremely uncomfortable and in desperate need of the bathroom. The positives were that the staff were very friendly, the entertainment was great and we actually took off on time and arrived in HKG earlier than expected.

Rarely saw a flight attendant. Never received what I wanted from drink service. Twice I was told they would return with my order. I never saw the flight attendant again. I has requested a Moslem meal. I did not receive. It

Cathay Pacific handle my plane delay very well. I will book with Cathay Pacific again in the future trips.

Not impressed with check in desk staff at Vancouver airport. Not a professional mind service and not cared or tried to help. Don’t think I would fly with them again

Very comfortable flights. Not so many new releases in terms of films.

More options for your flight to Southeast Asia

Complete your trip to Southeast Asia with a hotel stay or car hire