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Cheap flights from London Gatwick Airport to Siem Reap, Cambodia from £401

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 20/11. Fares are subject to change and may not be available on all flights or dates of travel.
LGW — SAI
9 Jul — 16 Jul1
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 9 June 2026.

Thu 3/909:25
LGW
-
SAI
2 stops27h 30m
SWISS
Thu 17/909:40
SAI
-
LGW
2 stops28h 45m
SWISS
Deal found 8/6£594
Thu 12/1118:40
LGW
-
SAI
2 stops41h 05m
SWISS
Thu 26/1109:55
SAI
-
LGW
2 stops38h 55m
SWISS
Deal found 7/6£610
Thu 17/909:25
LGW
-
SAI
2 stops27h 30m
SWISS
Thu 1/1009:40
SAI
-
LGW
2 stops28h 45m
SWISS
Deal found 6/6£612
Wed 28/1010:30
LGW
-
SAI
3 stops27h 30m
China Eastern
Sat 28/1122:00
SAI
-
LGW
3 stops39h 30m
China Eastern
Deal found 8/6£619
Tue 10/1110:30
LGW
-
SAI
2 stops51h 30m
China Eastern
Tue 24/1122:00
SAI
-
LGW
2 stops39h 30m
China Eastern
Deal found 7/6£647
Sun 1/1117:00
LGW
-
SAI
2 stops45h 00m
China Eastern
Thu 26/1122:00
SAI
-
LGW
2 stops39h 30m
China Eastern
Deal found 8/6£669
Sun 15/1110:30
LGW
-
SAI
2 stops51h 30m
China Eastern
Thu 3/1222:00
SAI
-
LGW
2 stops47h 00m
China Eastern
Deal found 6/6£672
Mon 9/1110:30
LGW
-
SAI
3 stops27h 30m
Multiple Airlines
Fri 13/1119:10
SAI
-
LGW
2 stops25h 50m
Multiple Airlines
Deal found 7/6£696
Wed 28/1010:30
LGW
-
SAI
3 stops27h 30m
China Eastern
Thu 26/1122:00
SAI
-
LGW
3 stops39h 30m
China Eastern
Deal found 8/6£719
Fri 13/1110:30
LGW
-
SAI
3 stops27h 30m
China Eastern
Thu 3/1222:00
SAI
-
LGW
2 stops47h 00m
China Eastern
Deal found 6/6£723
Tue 18/809:25
LGW
-
SAI
2 stops27h 30m
SWISS
Tue 15/910:30
SAI
-
LGW
2 stops27h 55m
SWISS
Deal found 6/6£737
Mon 6/710:05
LGW
-
SAI
2 stops29h 25m
Emirates
Tue 14/723:50
SAI
-
LGW
2 stops37h 30m
Emirates
Deal found 9/6£741

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 9 June 2026.

Round-trip from

£594

One-way from

£401

Popular in

December

Cheapest in

September

Average price

£832
SWISS
  • SWISS
  • 3/9-17/9
  • 4 total stops
  • 56h 15m total
  • London to Siem Reap
Search Deals
China Eastern
  • China Eastern
  • 20/11
  • 2 total stops
  • 27h 30m total
  • London to Siem Reap
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£54 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£25 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 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 9 June 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

Thu 17/9

09:25-18:55

2 stops27h 30m

Siem Reap–Angkor Intl

Thu 1/10

09:40-08:25

2 stops28h 45m

£612

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Wed 28/10

10:30-21:00

3 stops27h 30m

Siem Reap–Angkor Intl

Thu 26/11

22:00-06:30

2 stops39h 30m

£619

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Wed 28/10

10:30-21:00

3 stops27h 30m

Siem Reap–Angkor Intl

Sat 28/11

22:00-06:30

3 stops39h 30m

£619

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Sun 1/11

17:00-21:00

2 stops45h 00m

Siem Reap–Angkor Intl

Sat 28/11

22:00-06:30

2 stops39h 30m

£669
Fastest return journey

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Sun 1/11

21:20-18:45

1 stop14h 25m

Siem Reap–Angkor Intl

Wed 25/11

19:25-05:25

1 stop17h 00m

£762

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Sun 1/11

21:20-18:45

1 stop14h 25m

Siem Reap–Angkor Intl

Mon 30/11

19:25-05:25

1 stop17h 00m

£762

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Mon 6/7

14:35-21:30

2 stops24h 55m

Siem Reap–Angkor Intl

Wed 15/7

12:55-07:20

2 stops24h 25m

£778

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Sun 5/7

23:55-21:30

2 stops39h 35m

Siem Reap–Angkor Intl

Wed 15/7

12:55-07:20

2 stops24h 25m

£778

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Thu 29/10

23:55-21:10

2 stops38h 15m

Siem Reap–Angkor Intl

Thu 26/11

23:50-18:25

2 stops25h 35m

£802

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Sun 5/7

23:55-21:30

2 stops39h 35m

Siem Reap–Angkor Intl

Sun 12/7

12:55-07:20

2 stops48h 25m

£802

Flights are sorted by cheapest return flights first.

Deals found on 6/6

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

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 9 June 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
1,539 reviews
Check prices

Boarding

8.3

Overall

8.2

Comfort

8.0

Food

7.8

Crew

8.6

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
1,539 reviews
Singapore Airlines
8.2
Very Good
1,539 reviews
Check prices

Boarding

8.3

Overall

8.2

Comfort

8.0

Food

7.8

Crew

8.6

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, China Eastern, and British Airways can get you from London Gatwick Airport to Siem Reap in just under 14h 25m. Your travel time can differ by up to 13h 05m. 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
Stansted to Siem Reap flights
London City 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 9 June 2026.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest£720Average£1,065FlexibilityNo 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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