₹ 43,003 Find Cheap Flights from the United Kingdom to Southeast Asia – Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from the United Kingdom to Southeast Asia departing on 9/9. 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

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Cheap Flights from the United Kingdom to Southeast Asia

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from the United Kingdom 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 the United Kingdom to Southeast Asia

Mon, 12 Oct - Mon, 26 Oct
Air India Logo
22:10 - 11:00
LHR
-
IXZ
32h 20m
2 stops
Air India Logo
11:30 - 11:30
IXZ
-
LHR
29h 30m
1 stop
₹ 64,794Air India
Mon, 12 Oct - Mon, 26 Oct
Air India Logo
22:10 - 11:00
LHR
-
IXZ
32h 20m
2 stops
Air India Logo
11:30 - 06:35
IXZ
-
LHR
24h 35m
1 stop
₹ 64,890Air India
Mon, 12 Oct - Mon, 26 Oct
Air India Logo
22:10 - 11:00
LHR
-
IXZ
32h 20m
2 stops
Air India Logo
11:30 - 11:05
IXZ
-
LHR
29h 05m
2 stops
₹ 65,276Air India
Fri, 2 Oct - Mon, 5 Oct
Air India Logo
22:20 - 14:40
LHR
-
IXZ
35h 50m
1 stop
Air India Logo
11:40 - 11:30
IXZ
-
LHR
28h 20m
1 stop
₹ 67,879Air India
Thu, 1 Oct - Sun, 4 Oct
Gulf Air Logo
10:00 - 12:45
LHR
-
SIN
19h 45m
1 stop
Gulf Air Logo
20:00 - 06:55
SIN
-
LHR
17h 55m
1 stop
₹ 76,943Gulf Air
Mon, 31 Aug - Sat, 26 Sep
Shenzhen Airlines Logo
22:05 - 02:00
LHR
-
SIN
20h 55m
1 stop
Shenzhen Airlines Logo
13:30 - 20:00
SIN
-
LHR
37h 30m
1 stop
₹ 77,039Shenzhen Airlines
Tue, 15 Sep - Tue, 22 Sep
British Airways Logo
19:25 - 16:10
LHR
-
SIN
13h 45mdirect
British Airways Logo
23:25 - 06:35
SIN
-
LHR
14h 10mdirect
₹ 77,136British Airways
Thu, 10 Sep - Thu, 24 Sep
Finnair Logo
07:30 - 18:30
LHR
-
SIN
28h 00m
1 stop
Finnair Logo
21:35 - 09:10
SIN
-
LHR
18h 35m
1 stop
₹ 77,232Finnair
Sun, 6 Sep - Sat, 19 Sep
British Airways Logo
22:00 - 18:40
LHR
-
SIN
13h 40mdirect
British Airways Logo
23:25 - 06:35
SIN
-
LHR
14h 10mdirect
₹ 77,328British Airways
Tue, 3 Nov - Fri, 20 Nov
Gulf Air Logo
21:50 - 12:50
LHR
-
SIN
31h 00m
1 stop
Gulf Air Logo
20:00 - 14:45
SIN
-
LHR
26h 45m
1 stop
₹ 77,425Gulf Air
Booking Insights

KAYAK's insights & trends for flights to Southeast Asia

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

What is the cheapest flight to Southeast Asia?

These are the best return prices found by users searching on KAYAK in the last 5 days.

The cheapest ticket to Southeast Asia from the United Kingdom found in the last 5 days was to Singapore, at ₹ 84,275 return. The most popular route is London Gatwick Airport (LGW) to Singapore (SIN) and the cheapest return ticket found on this route in the last 5 days was ₹ 84,275.

What is the cheapest month to fly from the United Kingdom to Southeast Asia?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from the United Kingdom 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 the United Kingdom to Southeast Asia is November, when tickets cost ₹ 50,910 (return) on average. On the other hand, the most expensive months are July and December, when the average cost of round-trip tickets is ₹ 83,981 and ₹ 79,932 respectively.

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

The average price for all round-trip flights from the United Kingdom to Southeast Asia depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to Southeast Asia is generally at night, when retur flights cost ₹ 122,080 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 ₹ 148,919.

How far in advance should I book a flight from the United Kingdom 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 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 the United Kingdom to Southeast Asia, you should book around 4 weeks before departure, which saves you about 11% 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

June

Cheapest flight

₹ 43,003
Best time to beat the crowds (12% less expensive on average)
Most popular time to fly (28% more expensive on average)
Flight from London to Singapore

Flights from the United Kingdom to Southeast Asia: the best tips from KAYAK users

Insights shared by verified travellers who flew the route from the United Kingdom 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 for booking flights from the United Kingdom to Southeast Asia

  • How does KAYAK find such low prices on flights from the United Kingdom 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 the United Kingdom to Southeast Asia.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from the United Kingdom 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 the United Kingdom 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 the United Kingdom 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 the United Kingdom 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 the United Kingdom 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 day to fly to Southeast Asia?

    Based on KAYAK data, the cheapest day to fly to Southeast Asia is Monday when return tickets can be as cheap as ₹ 85,226. On the other hand, the most expensive day to fly is Saturday, when return prices are ₹ 251,724 on average.

Reviews of the top airlines flying from the United Kingdom to Southeast Asia

 
See real verified KAYAK customer reviews for airlines flying to Southeast Asia. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from the United Kingdom to Southeast Asia. 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 the United Kingdom 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 1420 reviews
7.8Entertainment
7.9Boarding
7.3Food
7.6Comfort
8.1Crew
Airline reviews

Not at all satisfactory. I had stomach upsets after taking food. Quality of Asian vegetarian meal was awful. Further there was no snacks/ fruits/ biscuits available as in between snacks.. only peanuts and pitzels.. except courteous staff rest of my experience was far from satisfactory

4.0 OkayAnonymous, May 2026
SFO - HKG
Read more Cathay Pacific reviews

Not at all satisfactory. I had stomach upsets after taking food. Quality of Asian vegetarian meal was awful. Further there was no snacks/ fruits/ biscuits available as in between snacks.. only peanuts and pitzels.. except courteous staff rest of my experience was far from satisfactory

Later on, when there was no more bottled water, the water we received had a strong chlorine/disinfectant odor. On my flight from Hong Kong to Los Angeles, there was a male flight attendant who had a mean attitude throughout the whole trip, and he was very impatient during meal service “Furthermore, we purchased a Hong Kong SIM card as part of our flight package, but we received no instructions—neither by email nor SMS—on how to activate or use it. Consequently, we were unable to use the service at all. We request a full refund, as this appears to be a deceptive charge

I liked the service. The touch screen needs improvement as well as movie choices.

when i ask for help all the crew members had a look like why are you calling me? very terse and rude.

First time tying out business class with this airline, hat a disappointment, never returning. We didn’t get the meal as requested from Singapore to HKG flight. While meals served connecting flight, crew takes meal order based off passenger membership status by giving the. Priority selection of meals. It was a battle, plain disappointment, not worth the hype, price, class as categorized/ advertised

Cathay was not the problem. The problem was the customer service from Kayak/Underprice. Will never book through Kayak again.

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.

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

Everything was good food could be better but ok for economy on my 2nd flight the head ph jack are bad you have to hold pushed in to hear anything but other then that very nice service

i booked vegetarian hindu meal for my flights from delhi to hong kong, and hong kong to los angeles. on first flight, they said that they do no have my meal information. thank fuilly some veg meals were still left and i could eat. However, on second flight they game me hindu non vegetarian meal, and I ate shrimp without knowing. pathetic.

I booked tickets for a family of five and specifically paid extra to select our seats together. We spent nearly $1,000 extra (around $100 per seat) for extra legroom so we could sit near each other. However, despite paying for this, we ended up being separated on the flight. This caused a major issue for our family because my parents do not speak English and rely on me to translate and assist them during the journey. I do not understand why Etihad changed our reserved seats without explanation. I am extremely dissatisfied with this experience. I expect the airline to do better, and I am requesting a full refund for the seat selection fees we paid.

1 hour delay meant missed my connecting flight and 1st day of holiday

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

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

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

I am a larger than average person and in my opinion i don't think it's fair to allocate a window seat to anyone who is my size or larger, i was seated between 2 large passengers on a full aircraft. The guy in the window seat also occupied a portion of the middle seat (my seat) which made my experience of flying with etihad very cramped and uncomfortable, i was flying from Abu Dhabi to Bangkok. Had this been a airbus 380 it would have been better as the seats are larger but unfortunately it wasn't so i had to endure the 6+hrs unable to get any rest

It was worst flight ever of 26h. Poor service and seating. Flight from Abu Dhabi to Islamabad service and seating was worst ever. No tv extra.

Needs better seat for business class. My seat was falling apart. Also no WiFi on that flight

The business class experience is fantastic. The crew were polite but often unavailable even when I tried to call them! I even found myself bringing my used dishes and cutlery up to the crew because no one had come to collect it after over an hour.

Very very bad service very tight seats never ever flying with Etihad again

Everything you need to know for your flight to Southeast Asia

Cabin class types available on flights to Southeast Asia

Cabin classes available on flights to Southeast Asia. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.