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Cheap flights from London Gatwick Airport to Siem Reap, Cambodia from £344

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 30/9. Fares are subject to change and may not be available on all flights or dates of travel.
LGW — SAI
18 Aug — 25 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Gatwick to Siem Reap

Enter your travel dates to find the best prices.

Cheapest flights from Gatwick to Siem Reap
Explore the most affordable flight options available from Gatwick to Siem Reap. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 July 2026.

Mon 28/918:00
LGW
-
SAI
2 stops44h 10m
China Eastern
Wed 21/1021:10
SAI
-
LGW
3 stops39h 30m
China Eastern
Deal found 15/7£617
Sun 30/809:05
LGW
-
SAI
2 stops27h 50m
SWISS
Mon 7/909:40
SAI
-
LGW
2 stops28h 45m
SWISS
Deal found 15/7£621
Thu 1/1015:20
LGW
-
SAI
2 stops41h 30m
Multiple Airlines
Sun 18/1010:00
SAI
-
LGW
2 stops27h 25m
Multiple Airlines
Deal found 15/7£624
Sun 4/1014:55
LGW
-
SAI
2 stops41h 55m
Multiple Airlines
Tue 20/1015:35
SAI
-
LGW
2 stops21h 50m
Multiple Airlines
Deal found 15/7£631
Wed 7/1010:25
LGW
-
SAI
2 stops23h 45m
Multiple Airlines
Sat 17/1011:55
SAI
-
LGW
2 stops25h 30m
Multiple Airlines
Deal found 17/7£632
Fri 28/809:25
LGW
-
SAI
2 stops27h 30m
SWISS
Mon 7/909:40
SAI
-
LGW
2 stops28h 45m
SWISS
Deal found 15/7£645
Sun 4/1014:55
LGW
-
SAI
2 stops41h 55m
Multiple Airlines
Thu 15/1015:35
SAI
-
LGW
2 stops21h 30m
Multiple Airlines
Deal found 15/7£646
Sun 4/1014:55
LGW
-
SAI
2 stops41h 55m
Multiple Airlines
Sat 17/1015:35
SAI
-
LGW
2 stops21h 50m
Multiple Airlines
Deal found 15/7£647
Sun 4/1014:55
LGW
-
SAI
2 stops41h 55m
Multiple Airlines
Sun 18/1015:35
SAI
-
LGW
2 stops21h 50m
Multiple Airlines
Deal found 15/7£649
Fri 28/812:35
LGW
-
SAI
2 stops24h 20m
Multiple Airlines
Mon 7/919:35
SAI
-
LGW
2 stops41h 00m
Multiple Airlines
Deal found 18/7£658

Find flight deals from Gatwick to Siem Reap

Discover tips and strategies to find the most affordable flight options for your journey from Gatwick (LGW) 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 19 July 2026.

Round-trip from

£617

One-way from

£344

Popular in

December

Cheapest in

July

Average price

£622
China Eastern
  • China Eastern
  • 28/9-21/10
  • 5 total stops
  • 83h 40m total
  • London to Siem Reap
Search Deals
30/9
  • 30/9
  • 3 total stops
  • 42h 00m total
  • London to Siem Reap
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£91 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£28 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Gatwick 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 19 July 2026.
Use the filters below to find and compare flights from London Gatwick Airport to Siem Reap that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Fri 28/8

09:25-18:55

2 stops27h 30m

Siem Reap–Angkor Intl

Mon 7/9

09:40-08:25

2 stops28h 45m

£645

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Sun 30/8

09:05-18:55

2 stops27h 50m

Siem Reap–Angkor Intl

Sat 5/9

09:40-08:20

2 stops28h 40m

£685

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Wed 7/10

10:25-18:55

3 stops26h 30m

Siem Reap–Angkor Intl

Sat 17/10

11:55-07:25

2 stops25h 30m

£689

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Wed 2/9

22:00-20:10

2 stops40h 10m

Siem Reap–Angkor Intl

Wed 30/9

21:10-15:00

3 stops47h 50m

£717

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Thu 1/10

09:25-18:55

2 stops27h 30m

Siem Reap–Angkor Intl

Mon 19/10

10:30-08:25

2 stops27h 55m

£735

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Mon 31/8

14:35-21:30

2 stops24h 55m

Siem Reap–Angkor Intl

Mon 7/9

12:55-12:35

2 stops29h 40m

£768

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Wed 28/10

13:35-21:10

2 stops24h 35m

Siem Reap–Angkor Intl

Sun 8/11

13:20-11:40

2 stops29h 20m

£806

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Wed 2/9

10:05-12:15

2 stops20h 10m

Siem Reap–Angkor Intl

Wed 23/9

12:55-12:35

2 stops29h 40m

£812

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Wed 19/8

14:35-21:30

2 stops24h 55m

Siem Reap–Angkor Intl

Wed 16/9

12:55-07:20

2 stops24h 25m

£815

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Wed 30/9

10:00-09:40

1 stop17h 40m

Siem Reap–Angkor Intl

Wed 28/10

10:45-09:00

1 stop29h 15m

£931

Flights are sorted by cheapest return flights first.

Deals found on 17/7

Showing 1-10 of 17 resultsSorted by cheapest first
1
2

Best time to book a flight from Gatwick to Siem Reap

Have a flexible travel schedule? Discover the best time to fly to Siem Reap from Gatwick 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.

Reviews of airlines servicing Siem Reap

Get insights into the airlines that provide service to Siem Reap. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Siem Reap. Reviews last updated 19 July 2026.
See what other customers who have flown with Singapore Airlines from London Gatwick Airport to Siem Reap have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Singapore Airlines
8.2
Very Good
1,573 reviews
Check prices

Crew

8.6

Boarding

8.3

Overall

8.2

Food

7.8

Comfort

8.0

Entertainment

8.1

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2026

SAI - SIN

The only issue we had was seat selection. Was not easy to change, after they assigned seats. Also, the premium economy seats, are nothing special.. All and all safe flight with minor back issues.
Singapore Airlines
8.2
Very Good
1,573 reviews
Singapore Airlines
8.2
Very Good
1,573 reviews
Check prices

Crew

8.6

Boarding

8.3

Overall

8.2

Food

7.8

Comfort

8.0

Entertainment

8.1

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2026

SAI - SIN

The only issue we had was seat selection. Was not easy to change, after they assigned seats. Also, the premium economy seats, are nothing special.. All and all safe flight with minor back issues.

Related info for your journey

Find useful and relevant information for your journey from Gatwick 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 Gatwick?

    Most people fly into Siem Reap–Angkor Intl (SAI) if they book a flight to Siem Reap from London Gatwick. On average, Siem Reap–Angkor Intl has 0 inbound flights from London Gatwick per day from 1 airline. Siem Reap–Angkor Intl is conveniently located just 24.7 mi from Siem Reap’s city center.

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

    SWISS and China Eastern can get you from London Gatwick Airport to Siem Reap in just under 27h 30m. Your travel time can differ by up to 12h 40m. The distance between London Gatwick Airport and Siem Reap is about 6102 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What is the cheapest airline to fly from London Gatwick Airport to Siem Reap round-trip?

    Currently priced at £720, Singapore Airlines will fly you from London Gatwick Airport to Siem Reap and back. In addition to Singapore Airlines, many other airlines offer competitively priced options for your trip.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Gatwick 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 Gatwick to Siem Reap

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

Top airline flying from Gatwick to Siem Reap

Discover the top airline that operate flights from Gatwick to Siem Reap. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 19 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest£720Average£1,058FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines 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 Gatwick to Siem Reap?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Siem Reap from Gatwick today with Cheapflights!

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

Cheapflights simply makes it quick and affordable to book flights from Gatwick to Siem Reap by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from Gatwick to Siem Reap, users can toggle the no change fees filter when performing a flight search.

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

Of course! You can now track prices for flights from Gatwick to Siem Reap and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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