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Cheap flights from London Gatwick Airport to Siem Reap from £318

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 27/6. Fares are subject to change and may not be available on all flights or dates of travel.
LGW — SAI
22 Mar — 29 Mar1
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 20 February 2026.

Sat 31/1017:00
LGW
-
SAI
2 stops33h 10m
Multiple Airlines
Sat 14/1122:00
SAI
-
LGW
3 stops39h 30m
Multiple Airlines
Deal found 19/2£545
Mon 2/1109:25
LGW
-
SAI
2 stops22h 35m
Multiple Airlines
Mon 16/1110:10
SAI
-
LGW
2 stops27h 15m
Multiple Airlines
Deal found 17/2£582
Fri 28/810:25
LGW
-
SAI
3 stops49h 45m
Multiple Airlines
Thu 10/909:45
SAI
-
LGW
3 stops27h 20m
Multiple Airlines
Deal found 19/2£629
Wed 25/1109:25
LGW
-
SAI
2 stops22h 35m
Multiple Airlines
Sat 5/1222:00
SAI
-
LGW
2 stops47h 00m
Multiple Airlines
Deal found 17/2£632
Sun 10/509:25
LGW
-
SAI
2 stops27h 20m
SWISS
Tue 26/509:40
SAI
-
LGW
2 stops28h 45m
SWISS
Deal found 19/2£665
Fri 8/509:25
LGW
-
SAI
2 stops27h 20m
SWISS
Thu 28/509:40
SAI
-
LGW
2 stops28h 45m
SWISS
Deal found 19/2£669
Mon 2/1109:20
LGW
-
SAI
1 stop23h 35m
Singapore Airlines
Mon 16/1110:45
SAI
-
LGW
1 stop26h 40m
Singapore Airlines
Deal found 17/2£679
Wed 4/1109:20
LGW
-
SAI
1 stop23h 35m
Singapore Airlines
Wed 18/1110:45
SAI
-
LGW
1 stop26h 40m
Singapore Airlines
Deal found 19/2£700
Wed 4/1117:00
LGW
-
SAI
2 stops33h 10m
Multiple Airlines
Wed 18/1110:10
SAI
-
LGW
2 stops27h 15m
Multiple Airlines
Deal found 19/2£717

Find flight deals from Gatwick to Siem Reap

Keep the following information in mind while searching for Gatwick to Siem Reap flight deals. Data was last updated 20 February 2026.

Round-trip from

£663

One-way from

£318

Popular in

December

Cheapest in

September

Average price

£815
China Eastern
  • China Eastern
  • 18/4-27/4
  • 4 total stops
  • 92h 00m total
  • London to Siem Reap
Search Deals
27/6
  • 27/6
  • 3 total stops
  • 46h 05m total
  • London to Siem Reap
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (£45 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£24 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 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 20 February 2026.
Use the filters below to find and compare flights from London Gatwick Airport to Siem Reap that are best for you.

Fly from

Gatwick

Fly to

Siem Reap

Route

Depart

Return

Price

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Sun 10/5

09:25-18:45

2 stops27h 20m

Siem Reap–Angkor Intl

Tue 26/5

09:40-08:25

2 stops28h 45m

£665

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Fri 8/5

09:25-18:45

2 stops27h 20m

Siem Reap–Angkor Intl

Thu 28/5

09:40-08:25

2 stops28h 45m

£669

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Fri 8/5

15:35-18:45

2 stops21h 10m

Siem Reap–Angkor Intl

Thu 28/5

09:40-08:55

2 stops29h 15m

£756

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Fri 8/5

10:15-09:40

1 stop17h 25m

Siem Reap–Angkor Intl

Thu 28/5

10:30-06:55

1 stop26h 25m

£798

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Mon 16/3

10:30-21:00

2 stops27h 30m

Siem Reap–Angkor Intl

Mon 6/4

21:10-15:00

2 stops47h 50m

£881

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Sun 15/3

10:30-21:00

3 stops51h 30m

Siem Reap–Angkor Intl

Mon 6/4

21:10-15:00

3 stops47h 50m

£881

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Sun 5/4

06:10-14:50

3 stops26h 40m

Siem Reap–Angkor Intl

Sun 12/4

19:10-22:05

3 stops32h 55m

£888

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Mon 10/8

10:15-09:40

1 stop17h 25m

Siem Reap–Angkor Intl

Mon 24/8

10:30-06:55

1 stop26h 25m

£992

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Wed 11/3

13:35-21:10

2 stops24h 35m

Siem Reap–Angkor Intl

Tue 7/4

23:50-07:20

2 stops37h 30m

£1,008

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Thu 12/3

23:55-21:10

2 stops38h 15m

Siem Reap–Angkor Intl

Tue 7/4

23:50-07:20

2 stops37h 30m

£1,008

Flights are sorted by cheapest return flights first.

Deals found on 19/2

Showing 1-10 of 20 results
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.

Cheapflights Insights

Everything you need to know about your flight from London Gatwick Airport to Siem Reap
No data available for this route at this time. Please check back soon.

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 20 February 2026.
Read through reviews of airlines operating flights from London Gatwick Airport to Siem Reap, such as Singapore Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Singapore Airlines
8.2
Very Good
1,463 reviews
Check prices

Overall

8.2

Boarding

8.3

Crew

8.6

Comfort

8.0

Entertainment

8.0

Food

7.8

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
1,463 reviews
Singapore Airlines
8.2
Very Good
1,463 reviews
Check prices

Overall

8.2

Boarding

8.3

Crew

8.6

Comfort

8.0

Entertainment

8.0

Food

7.8

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.

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

    A quick flight from London Gatwick Airport to Region of Siem Reap can take about 17h 25m. SWISS provides one of the quickest options available for as low as £798. Airlines will cover a distance of 6102 mi. This flight may include one or multiple stops.

  • 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

Browse thousands of different options on Cheapflights for your next trip

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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 20 February 2026.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest£693Average£1,054FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Gatwick to Siem Reap?

When you search for this flight from Gatwick to Siem Reap, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Gatwick to Siem Reap.

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?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Siem Reap from Gatwick today and book when prices fit your budget.

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