S$ 486 Find Cheap Flights from London Heathrow Airport to Southeast Asia

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Heathrow to Southeast Asia departing on 10-2. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Southeast Asia

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Southeast Asia.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Southeast Asia.
Travellers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Track pricesNot ready to book? Create a price alert for when prices drop.

Free to useThere are no hidden charges or fees.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Heathrow to Southeast Asia

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Heathrow to Southeast Asia that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Heathrow to Southeast Asia

Wed, 18 Feb - Thu, 5 Mar
China Eastern Logo
21:00 - 22:25
LHR
-
BKK
18h 25m
1 stop
China Eastern Logo
05:45 - 17:30
BKK
-
LHR
18h 45m
1 stop
S$ 709China Eastern
Wed, 18 Feb - Mon, 16 Mar
China Eastern Logo
21:00 - 22:25
LHR
-
BKK
18h 25m
1 stop
China Eastern Logo
19:55 - 17:30
BKK
-
LHR
28h 35m
1 stop
S$ 713China Eastern
Wed, 18 Feb - Mon, 9 Mar
China Eastern Logo
21:00 - 22:45
LHR
-
HKT
18h 45m
1 stop
China Eastern Logo
23:05 - 17:30
HKT
-
LHR
25h 25m
1 stop
S$ 714China Eastern
Wed, 18 Feb - Fri, 13 Mar
China Eastern Logo
21:00 - 23:55
LHR
-
BKK
19h 55m
1 stop
China Eastern Logo
00:55 - 17:30
BKK
-
LHR
23h 35m
1 stop
S$ 714China Eastern
Sun, 8 Mar - Sun, 15 Mar
Shenzhen Airlines Logo
21:10 - 12:10
LHR
-
SIN
31h 00m
1 stop
Shenzhen Airlines Logo
13:10 - 19:10
SIN
-
LHR
38h 00m
1 stop
S$ 810Shenzhen Airlines
Wed, 22 Apr - Thu, 14 May
Hainan Airlines Logo
22:00 - 03:10
LHR
-
SIN
22h 10m
1 stop
Hainan Airlines Logo
12:05 - 19:30
SIN
-
LHR
38h 25m
2 stops
S$ 813Hainan Airlines
Mon, 20 Apr - Wed, 13 May
Hainan Airlines Logo
22:00 - 03:10
LHR
-
SIN
22h 10m
2 stops
Hainan Airlines Logo
04:40 - 19:30
SIN
-
LHR
21h 50m
1 stop
S$ 815Hainan Airlines
Sat, 16 May - Sat, 23 May
Shenzhen Airlines Logo
22:05 - 12:10
LHR
-
SIN
31h 05m
1 stop
Shenzhen Airlines Logo
18:10 - 20:00
SIN
-
LHR
32h 50m
1 stop
S$ 819Shenzhen Airlines
Mon, 20 Apr - Mon, 27 Apr
Gulf Air Logo
10:00 - 12:20
LHR
-
SIN
19h 20m
1 stop
Gulf Air Logo
20:00 - 06:55
SIN
-
LHR
17h 55m
1 stop
S$ 821Gulf Air
Tue, 10 Feb - Tue, 17 Feb
Air France Logo
14:45 - 16:55
LHR
-
SIN
18h 10m
1 stop
Air France Logo
10:55 - 21:25
SIN
-
LHR
18h 30m
1 stop
S$ 823Air France
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?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Southeast Asia from London Heathrow Airport found in the last 72 hours was to Singapore, at S$ 1,107 return. The most popular route is from London Heathrow Airport (LHR) to Singapore (SIN), and the cheapest round-trip airline ticket found on this route in the last 72 hours was S$ 1,107.

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

The average return price for all direct flights, flights with one stopover, and flights with two stopovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of S$ 784, prices are generally cheapest when you fly direct.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from London Heathrow Airport to Southeast Asia, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from London Heathrow Airport to Southeast Asia is May, when tickets cost S$ 887 (return) on average. On the other hand, the most expensive months are July and December, when the average cost of return tickets is S$ 1,487 and S$ 1,361 respectively.

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

The average price of all round-trip flights from London Heathrow Airport to Southeast Asia clicked on KAYAK for each day over the last 12 months.

For London Heathrow Airport to Southeast Asia, Monday is the cheapest day to fly on average and Saturday is the most expensive. Flying from Southeast Asia back to London Heathrow Airport, the best deals are generally found on Tuesday, with Saturday being the most expensive.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from London Heathrow Airport to Southeast Asia, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below-average price on a flight from London Heathrow Airport to Southeast Asia, you should book around 3 weeks before departure, which saves you about 15% compared to booking last-minute. For the absolute cheapest price, our data suggests you should book 24 weeks before departure.

Good to know

Low seasonSeptember
Cheapest flightS$ 486
Best time to beat the crowds (13% less expensive on average)
Most popular time to fly (28% more expensive on average)
Flight from London Heathrow Airport 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
LHR
-
SIN
Jan 2025
It’s a long time sitting in that seat so sit on a cushion!
Verified travelerFlew with Qantas Airways
LHR
-
SIN
Sept 2024
Unless you’re flying Business or First Class, definitely take your own travel pillow - they make a difference.
OmarFlew with Qantas Airways
LHR
-
SIN
May 2024
Qantas lounge was crowded. try other One World lounges
Verified travelerFlew with Singapore Airlines
LHR
-
SIN
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 Heathrow Airport 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 Heathrow Airport to Southeast Asia.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from London Heathrow Airport 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 Heathrow Airport 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 Heathrow Airport 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 Heathrow Airport 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 Heathrow Airport to Southeast Asia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

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

    The cheapest time of day to fly to Southeast Asia is generally in the evening, when retur flights cost S$ 1,242 on average. Morning departures are around 5% more expensive than evening flights, on average. The most expensive time of day to fly to Southeast Asia is generally at night, which is peak travel time and where the average cost of a ticket is S$ 1,387.

Top tips for finding cheap flights to Southeast Asia

  • Looking for a cheap flight? 25% of our users found tickets from London Heathrow Airport to the following destinations at these prices or less: Singapore S$ 648 one-way - S$ 1,245 round-trip

Reviews of the top 5 airlines flying from Heathrow to Southeast Asia

 
See real verified KAYAK customer reviews for airlines flying from London to Southeast Asia. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
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.
8.2
Singapore AirlinesOverall score based on 1439 reviews
8.0Entertainment
8.6Crew
7.8Food
8.0Comfort
8.3Boarding
Airline reviews

Food was served to different people at different times and it wasn't clear why. The crew apologized for the wait. But it felt odd and inconsistent. They could use charging ports on each of the seats. Mine didn't have any. Also, they could've offered more snacks. It was a 12+ hour flight and no snacks were ever offered. Everything else was OK.

10.0 ExcellentJaysin, Jan 2026
SGN - SIN
Read more Singapore Airlines reviews

Food was served to different people at different times and it wasn't clear why. The crew apologized for the wait. But it felt odd and inconsistent. They could use charging ports on each of the seats. Mine didn't have any. Also, they could've offered more snacks. It was a 12+ hour flight and no snacks were ever offered. Everything else was OK.

I find it was a bit hot before take off. If there is a way to improve the airflow it would be great

The flight arrived on time. 2×2 seating meant no one needed to sit in the middle. This was a connectibf flight from Singapore and required going to 3 counters in different levels to check a golf bag

The crew was very courteous and professional. the flight is relatively clean and comfortable.

Pleasant business class flight experience with good onboarding experience. Flight service team was excellent with usual book-the-chef menu available

Wish the underseat compartment don’t have a restriction, can fit a personal item such as backpack fully like most Boeing

The business class seats were very uncomfortable. When in lie flat position my legs were very restricted.

Headwind delayed our flight which wasn’t the airlines fault

Food from Surabaya was below average but from Singapore is much better

Horrendous. We upgraded and they took the money but cancelled one of our tickets. The recline action didn’t work on the seats for the flight from Singapore to London, pre booked meals but they seemed to have disappeared as well.. Phone customer service was horrendous. Took 5 phone calls and no fix. Craig at the airport was the only one who seemed to be able to get the ticket back.

It was great! Kept the time. Provided what was promised

The crew could have been more friendly and could have offered to make the beds. Also, Ethiad should have more vegetarian food options.

Kayak and Aran grant issuing business class tickets without lounge access and sometimes 1 or 2 connections in economy class. It’s very disappointing to find out that after buying the ticket. Never buy tickets on kayak and Aran grant again

Etihad Check In counter/Station manager in Heathrow was bothering and not helpful at all. They are rude and not customer oriented

I missed my flight ,staff unhelpful, they sat and watched me wait ,gangway door closed, English was a problem no announcement I was on time now I missed my month vacation ,lost 1400 bucks no refund I'm sick to my stomach

Seat space was tight and uncomfortable. There was hardly any cushioning giving me a terrible tail bone ache. Getting and out was extremely cramped. We paid for seat choices and felt totally ripped off. Food was mediocre. By the time the servers served 2 or 3 rows they ran out of this or that option as we saw on the inbound trip also. This is infuriating. Entertainment choices were extremely limited for such a long haul. The screen froze on occasion and did not switch off when the on off button was pressed. When it did it came back on its own in 5 seconds. The airlines has gone downhill since last year.

1 hour flight. No complaints. Some drinks would have been nice.

Crew was amazing as usual. Very comfortable for a 13hour flight. Check in at ATL was terrible. Ticket counter charged me $200 for a small bag. Apparently Kayak sold me a zero luggage ticket. No carry on no checked. So the check in desk charged me a bullshit $200 dollar fee for a small gym bag weighing less than 20lbs. In true 3rd party ticket buying. This will turn into a finger pointing process between Kayak and Etihad. Now I'm going to have to ship my bag back in the mail a day ahead of my return flight.

More leg space than other flights, but *maybe* narrower seats

More leg space than other flights, but felt like *maybe* narrower seats?

Pretty much what you'd expect for an economy flight. The crew were excellent as usual. The food was ok, but nothing special.

Staff is rude and condescending. Airline is badly managed. They take away their flimsy earphones and blankets one hour before the lading. I’ve never experienced this with any other airline. It’s a very portly managed and run airline that should be avoided.

The Senior Flight attendant was just amazing on our Flight GF 284 on 30/11/25. She was so attentive, helpful and caring not just to us but to all in our cabin.

Loading was on time and quick Not very many people

Amazing business class in a single aisle plane. Fully flat seats, pyjamas, amenity kits, all in all a really complete product. Service was good - not amazing - but they did a good job. Got a few hours sleep. Will fly with them again if I can.

They flight was without ait conetion weather was very hot

Did not have to leave plane. However found the wait tiring with nearly a full plane boarding at Male and being unable to get out of seat due to cleaners security and a full plane boarding with hand luggage. Staff were excellent despite a long and tiring flight due to stopover.

Everything about our return trip from Colombo to Manchester was excellent. Staff were brilliant all flights. Return flights on time and all staff were brilliant. The outbound journey however was marred by cancellation of Man to Bahrain flight. No information or staff assistance. Customer Service none existent. Told to make own arrangements by none interested or understanding telephone staff who said to make own hotel arrangements and be reimbursed. CS refused to reimburse hotel or lost lounge booking or taxi fees.

The boarding was late. The check-in board said boarding closed but the boarding hadn't even started. I have spine issue but not eligible for wheelchair since I can walk. But we were taken to a plane with stairs to climb. I requested support with the handcarry and was told that I shouldn't have booked this flight without wheelchair. Instead this information should be public if this plane has sky bridge or stairs. The infotainment system did not work either. And the plane was very loud with very less legroom in economy.

Very poor experience, passengers and were not social and started a troubled with other passengers and a fight erupted

Boarding was by group and we had to take the bus. There were no elevators so had to walk down the stairs. It would help to have escalators or elevators. Note I had a special needs child and the gate crew was rushing us in. The bus was full but we were packed with no seats to sit.

Layover time was not sufficient as the gate was too far, I had to literally run and was out of my breath. This was main drawback. The crew was wonderful and so is their service. I loved interacting with them.

Late flight Delays Poor service Poor staff Worst airline ever

Paid for exit row at the back of the plane. Window seat with lots of leg space. Food was inedible (as usual). Brought my own.

Efficiency of staff, and comfort and cleanliness of aircraft was all great. Maybe a hot drink without payment at that time in the morning would be good!

Both flights were delayed over 1 hour. And I had to pay for seats, even though my reservation supposedly included free seat selection.

I fly to Germany every year and prefer the most direct flight routes. Lufthansa offers this route, allowing me to fly from my home airport directly to Germany. The food and service were excellent. The staff was most accommodating, very professional, and friendly. The only issue I did not care for was the seating arrangement. I fly business and did not appreciate the configuration of the business class. Understandably, you will always have someone seated next to you, but then install a separation screen to allow for a little more privacy. United and British Airways are miles ahead in creating a more personal space. Lufthansa should do better.

The plane was late (as was my flight out from Birmingham the day before)

We had almost a 6 hr delay, primarily due to weather, the e problem was that they communicated this delay and its length very poorly. The boarding was chaotic - even though they had hours to figure it out! The plane was an old 747 whose touch screens barely worked and there was a faulty USB port under my seat rest (something that wasn't labeled as being there) They organized my delayed luggage well. And I could get updates on the Lufthansa website. My shirt connecting flight charged for everything except water. Coffee was over 3€

Very small and uncomfortable seats, Hard to hear entertainment system sound. Horrible food. Staff doesn't care much about the passengers. 2nd time they didn't give me my vegetarian meal. They asked me regular food with meat. The airline and staff was from United airlines.

I was unable to board this flight because of visa changes that I was not alerted about and I’ve been unable to contact Kayak to obtain a refund / credit anything.

My touch screen at my seat wasn't working, the films BA advertised on the website for this flight were not available, and the plane was a little dated, food was good and the staff were good, just let down by the aircraft facilities.

Did not like the seating configuration at all with 2+3+2 in business class. Lacking total privacy and comfort

Check-in experience, for business call please provide a premium experience

Lost my luggage, ran out of food choices in business class, ground crew was completely unapologetic.

Excellent. The crew and flight were great. Checking in was easy and everyone was very helpful.

Late. And service was very slow - passengers sat for well over an hour with dirty trays etc surrounding them

Entertainment devices on A380 need to be fixed, the seats might do with updates.

I like everything about British Airways. Excellence. Perfect. Exquisite service.

The plane was dirty the food was awful and the boarding process took too long

Everything you need to know for your flight to Southeast Asia

Information on your arrival and departure airports