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Cheap flights from London Stansted Airport to Siem Reap, Cambodia from £275

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 1/10. Fares are subject to change and may not be available on all flights or dates of travel.
STN — SAI
6 Sep — 13 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Stansted to Siem Reap

Enter your travel dates to find the best prices.

Cheapest flights from Stansted to Siem Reap
Explore the most affordable flight options available from Stansted to Siem Reap. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 7 August 2026.

Thu 1/1007:20 -
2 stops31h 45m
Thu 29/1019:05 -
3 stops33h 50m
Deal found 5/8£686
Sun 20/907:25 -
3 stops28h 40m
Sat 3/1017:20 -
2 stops27h 20m
Deal found 3/8£694
Thu 3/906:00 -
3 stops26h 50m
Thu 17/911:30 -
3 stops42h 25m
Deal found 4/8£738
Wed 7/1021:05 -
2 stops18h 25m
Tue 30/323:50 -
2 stops43h 05m
Deal found 5/8£747
Thu 1/1021:05 -
2 stops42h 25m
Wed 14/1012:55 -
2 stops35h 50m
Deal found 3/8£764
Mon 31/821:05 -
2 stops18h 25m
Fri 11/912:55 -
2 stops30h 00m
Deal found 7/8£778
Fri 30/1014:05 -
2 stops24h 05m
Sat 14/1123:50 -
2 stops25h 05m
Deal found 7/8£797
Mon 16/1114:05 -
2 stops24h 05m
Mon 7/1213:20 -
2 stops29h 45m
Deal found 4/8£802
Wed 30/914:55 -
2 stops24h 35m
Wed 28/1013:20 -
2 stops29h 45m
Deal found 7/8£808

Find flight deals from Stansted to Siem Reap

Discover tips and strategies to find the most affordable flight options for your journey from Stansted (STN) to Siem Reap (SAI). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 7 August 2026.

Round-trip from

£686

One-way from

£275

Popular in

December

Cheapest in

July

Average price

£926
1/10-29/10
  • 1/10-29/10
  • 5 total stops
  • 65h 35m total
  • London to Siem Reap
Search Deals
1/10
  • 1/10
  • 3 total stops
  • 51h 00m total
  • London to Siem Reap
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£74 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£27 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Stansted to Siem Reap 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 7 August 2026.
Use the filters below to find and compare flights from London Stansted Airport to Siem Reap that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonSiem Reap

STN London Stansted - SAI Siem Reap–Angkor Intl

STNSAI

London Stansted

Thu 1/10

21:05-21:30

2 stops42h 25m

Siem Reap–Angkor Intl

Wed 14/10

12:55-18:45

2 stops35h 50m

£764

LondonSiem Reap

STN London Stansted - SAI Siem Reap–Angkor Intl

STNSAI

London Stansted

Thu 12/11

20:15-21:10

2 stops41h 55m

Siem Reap–Angkor Intl

Tue 24/11

23:50-17:55

2 stops25h 05m

£766

LondonSiem Reap

STN London Stansted - SAI Siem Reap–Angkor Intl

STNSAI

London Stansted

Thu 19/11

20:15-21:10

2 stops41h 55m

Siem Reap–Angkor Intl

Sat 5/12

23:50-12:05

2 stops19h 15m

£778

LondonSiem Reap

STN London Stansted - SAI Siem Reap–Angkor Intl

STNSAI

London Stansted

Fri 30/10

14:05-21:10

2 stops24h 05m

Siem Reap–Angkor Intl

Sat 14/11

23:50-17:55

2 stops25h 05m

£797

LondonSiem Reap

STN London Stansted - SAI Siem Reap–Angkor Intl

STNSAI

London Stansted

Mon 16/11

14:05-21:10

2 stops24h 05m

Siem Reap–Angkor Intl

Mon 7/12

13:20-12:05

2 stops29h 45m

£802

LondonSiem Reap

STN London Stansted - SAI Siem Reap–Angkor Intl

STNSAI

London Stansted

Wed 30/9

14:55-21:30

2 stops24h 35m

Siem Reap–Angkor Intl

Wed 28/10

13:20-12:05

2 stops29h 45m

£808

LondonSiem Reap

STN London Stansted - SAI Siem Reap–Angkor Intl

STNSAI

London Stansted

Wed 2/9

14:55-21:30

2 stops24h 35m

Siem Reap–Angkor Intl

Wed 30/9

12:55-18:45

2 stops35h 50m

£819

LondonSiem Reap

STN London Stansted - SAI Siem Reap–Angkor Intl

STNSAI

London Stansted

Sat 21/11

14:05-12:40

2 stops39h 35m

Siem Reap–Angkor Intl

Sat 5/12

23:50-17:55

2 stops25h 05m

£845
Fastest return journey

LondonSiem Reap

STN London Stansted - SAI Siem Reap–Angkor Intl

STNSAI

London Stansted

Wed 19/8

21:05-21:30

2 stops18h 25m

Siem Reap–Angkor Intl

Wed 16/9

12:55-12:55

2 stops30h 00m

£871
Cheapest one-way

LondonSiem Reap

STN London Stansted - SAI Siem Reap–Angkor Intl

STNSAI

London Stansted

Tue 10/11

07:05-16:05

3 stops26h 00m

£340

Flights are sorted by cheapest return flights first.

Deals found on 5/8

Showing 1-10 of 20 resultsSorted by cheapest first
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Best time to book a flight from Stansted to Siem Reap

Have a flexible travel schedule? Discover the best time to fly to Siem Reap from Stansted with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

Find useful and relevant information for your journey from Stansted to Siem Reap. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Siem Reap from London Stansted?

    If you book a flight to Siem Reap from London Stansted, you will be flying to Siem Reap–Angkor Intl, which is the city’s only airport. Siem Reap–Angkor Intl (SAI) is located 24.7 mi from the center of Siem Reap. There are 0 flights from London Stansted to Siem Reap–Angkor Intl per day from 0 different airlines.

  • How long is the flight from London Stansted Airport to Siem Reap?

    Airlines like Emirates fly from London Stansted Airport to Siem Reap in about 42h 25m. The time it takes to get you to your destination can typically vary by up to . The distance from London Stansted Airport to Siem Reap is about 6068 mi.

  • Can I find deals for flights from Stansted to Siem Reap that include hotel bookings?

    Yes. In addition to deals on Stansted to Siem Reap flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Stansted to Siem Reap?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Stansted to Siem Reap.

  • Can I find deals for business class flights from Stansted to Siem Reap?

    Yes. Cheapflights offers flight deals from Stansted to Siem Reap by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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Alternative routes for Stansted to Siem Reap

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Siem Reap flights
Gatwick to Siem Reap flights
London City to Siem Reap flights
Luton to Siem Reap flights

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 Stansted to Siem Reap?

Cheapflights makes it easy to find Stansted to Siem Reap flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Stansted to Siem Reap?

Cheapflights helps you find that perfect flight to Siem Reap from Stansted by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Stansted to Siem Reap with no change fees?

Yes! Cheapflights helps users easily find flights from Stansted to Siem Reap with no change fees.

Can Cheapflights notify me if prices for flights from Stansted to Siem Reap become cheaper?

Yes! Start tracking prices for Stansted to Siem Reap 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.

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