Cheap Flights from London to Siem Reap
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Flights from London to Siem Reap
Airlines Flying from London to Siem Reap
Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.
Flight deals from London to Siem Reap
We've found these cheap flights for you. You can book one-way or return flight tickets.
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One way
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LHR 11:0021h 10m1 stopsSAI 14:10London - Siem Reap | Tue, Jul 1 | Malaysia Airlines
SIN 14:5521h1 stopsLHR 05:55Siem Reap - London | Mon, Jul 7 | AirAsiaUS$1,118 US$1,38920% OFF20% OFFUS$1,389 US$1,118 -
LHR 19:5016h 25m1 stopsSAI 18:15London - Siem Reap | Tue, Jul 1 | Vietnam Airlines
SAI 18:0529h 45m1 stopsLHR 17:50Siem Reap - London | Sat, Jul 5 | Vietnam AirlinesUS$1,145 US$1,38918% OFF18% OFFUS$1,389 US$1,145 -
LHR 18:5516h 15m1 stopsSAI 17:10London - Siem Reap | Mon, Aug 11 | Vietnam Airlines
SIN 19:1028h 40m1 stopsLHR 17:50Siem Reap - London | Mon, Aug 18 | Vietnam AirlinesUS$1,154 US$1,38917% OFF17% OFFUS$1,389 US$1,154
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STN 14:5524h 35m1 stopsSAI 21:30London - Siem Reap | Fri, Jun 27 | Emirates
SAI 23:5025h 55m1 stopsLGW 19:45Siem Reap - London | Thu, Jul 3 | EmiratesUS$1,15517% OFFUS$1,389 US$1,155 -
STN 14:5524h 35m1 stopsSAI 21:30London - Siem Reap | Mon, Jul 7 | Emirates
SAI 23:5024h 50m1 stopsLHR 18:40Siem Reap - London | Tue, Jul 15 | EmiratesUS$1,16716% OFFUS$1,389 US$1,167
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STN 14:5524h 35m1 stopsSAI 21:30London - Siem Reap | Fri, Jul 4 | Emirates
SAI 23:5019h 5m1 stopsLHR 12:55Siem Reap - London | Thu, Jul 10 | EmiratesUS$1,17116% OFFUS$1,389 US$1,171
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LGW 14:3025h1 stopsSAI 21:30London - Siem Reap | Wed, Jul 2 | Emirates
SAI 23:5025h 55m1 stopsLGW 19:45Siem Reap - London | Thu, Jul 10 | EmiratesUS$1,17116% OFFUS$1,389 US$1,171
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LHR 19:5015h 20m1 stopsSAI 17:10London - Siem Reap | Sun, Aug 17 | Vietnam Airlines
SAI 18:0529h1 stopsLHR 17:05Siem Reap - London | Sun, Aug 24 | Vietnam AirlinesUS$1,17515% OFFUS$1,389 US$1,175
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LHR 11:0021h 10m1 stopsSAI 14:10London - Siem Reap | Wed, Jul 2 | Malaysia Airlines
SIN 14:5521h1 stopsLHR 05:55Siem Reap - London | Wed, Jul 9 | AirAsiaUS$1,18015% OFFUS$1,389 US$1,180
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LHR 18:5516h 15m1 stopsSAI 17:10London - Siem Reap | Mon, Jun 30 | Vietnam Airlines
SIN 19:1028h 40m1 stopsLHR 17:50Siem Reap - London | Mon, Jul 7 | Vietnam AirlinesUS$1,18115% OFFUS$1,389 US$1,181
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LON 13:0017h 25m1 stopsREP Invalid DateLondon - Siem Reap | Sat, Jun 28 | Normal Airline
REP 15:006hDirectLON 16:00Siem Reap - London | Mon, Jun 30 | Normal AirlineFind More FlightsFind More Flights
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LHR 11:0021h 20m1 stopsSAI 14:20London - Siem Reap | Sun, Aug 24 | Malaysia AirlinesUS$611 US$87330% OFF30% OFFUS$873 US$611
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LHR 19:1017h 5m1 stopsSAI 18:15London - Siem Reap | Thu, Aug 21 | Vietnam AirlinesUS$618 US$87328% OFF28% OFFUS$873 US$618
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LHR 19:5016h 25m1 stopsSAI 18:15London - Siem Reap | Tue, Aug 19 | Vietnam AirlinesUS$624 US$87328% OFF28% OFFUS$873 US$624
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STN 21:1018h 20m1 stopsSAI 21:30London - Siem Reap | Mon, Aug 18 | EmiratesUS$62928% OFFUS$873 US$629
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LHR 19:5015h 20m1 stopsSAI 17:10London - Siem Reap | Sun, Aug 24 | Vietnam AirlinesUS$63927% OFFUS$873 US$639
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LHR 11:0021h 10m1 stopsSAI 14:10London - Siem Reap | Tue, Jul 1 | Malaysia AirlinesUS$64726% OFFUS$873 US$647
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STN 21:1018h 20m1 stopsSAI 21:30London - Siem Reap | Fri, Aug 15 | EmiratesUS$65425% OFFUS$873 US$654
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LHR 11:0021h 10m1 stopsSAI 14:10London - Siem Reap | Fri, Aug 22 | Malaysia AirlinesUS$67323% OFFUS$873 US$673
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LHR 19:1014h 55m1 stopsSAI 16:05London - Siem Reap | Thu, Aug 14 | Vietnam AirlinesUS$73316% OFFUS$873 US$733
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LHR 21:3531h 35m1 stopsSAI 11:10London - Siem Reap | Thu, Aug 21 | EVA AirUS$74215% OFFUS$873 US$742 -
LON 13:0017h 25m1 stopsREP Invalid DateLondon - Siem Reap | Sat, Jun 28 | Normal AirlineFind More FlightsFind More Flights
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Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.
Flight Information from London to Siem Reap
| Cheapest one-way flight price | US$611 |
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| Cheapest return ticket price | US$1,118 |
| Off-season travel month | May |
| Peak season for travel | March |
| Flight distance | 9,780.38km |
| Popular airline | Thai Airways |
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Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.
FAQ
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When are flight tickets from London (LON) to Siem Reap (REP) the cheapest?
Airlines adjust prices for flights from London to Siem Reap based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the cheapest flight prices on Tuesdays, Wednesdays, and Saturdays. -
How much are flights from London (LON) to Siem Reap (REP) cost?
According to Trip.com's data, the lowest price is around US$1,096. -
How many airports in Siem Reap (REP)?
There are 1 airport(s) in Siem Reap (REP): Siem Reap Angkor International Airport.
How to find a cheap flight from London to Siem Reap
Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from London to Siem Reap. Book your flights at the right time and save more.
Be flexible with your travel dates to get the cheapest flight from London to Siem Reap.
Simply tap "Date" on the flight search bar to browse through the calendar and check out airfare from London to Siem Reap over the next 6 months in 2025. If you're planning to fly within the next three months, it looks like the most affordable option is on Sun, Aug 24, with one-way flights priced at just US$611.
Compare cheap flight deals from London to Siem Reap across hundreds of airlines.
With our extensive search, you can compare prices from over 500 airlines to find the cheapest flight tickets from London to Siem Reap. The cheapest airline for this route is Malaysia Airlines.
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By setting up a Price Alert for your journey from London to Siem Reap, you can easily keep an eye on ticket prices without having to check every day.
Don't miss out on cheap flight deals and promo codes from London to Siem Reap.
You can always find the latest offers through Trip.com Deals and Promo Codes for cheap flights. By signing up for a free membership, you'll get access to even more deals for your flights.
Book early or wait until the last minute.
It's usually best to book early. Flight tickets are often cheapest when they're first released, typically about a year before the departure date. So, have a look online as soon as the flights you're interested in become available. If you miss the cheapest time, you might still find some good deals as the departure date gets closer.
Search for flights on the go.
For the best travel flight booking experience, download the Trip.com app. You can search for cheap flights from London to Siem Reap and snag some exclusive deals just for you.
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