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Cheap flights from London Gatwick Airport to Siem Reap from £367

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 7/10. Fares are subject to change and may not be available on all flights or dates of travel.
LGW — SAI
16 Aug — 23 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 17 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£615
Sun 30/809:05
LGW
-
SAI
2 stops27h 50m
SWISS
Mon 7/909:40
SAI
-
LGW
2 stops28h 45m
SWISS
Deal found 15/7£618
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£621
Sat 19/915:20
LGW
-
SAI
2 stops41h 30m
Multiple Airlines
Sat 26/915:35
SAI
-
LGW
2 stops21h 50m
Multiple Airlines
Deal found 13/7£628
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£629
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£630
Fri 28/809:25
LGW
-
SAI
2 stops27h 30m
SWISS
Mon 7/909:40
SAI
-
LGW
2 stops28h 45m
SWISS
Deal found 15/7£643
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£643
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£644
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£646

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 17 July 2026.

Round-trip from

£615

One-way from

£367

Popular in

December

Cheapest in

July

Average price

£620
China Eastern
  • China Eastern
  • 28/9-21/10
  • 5 total stops
  • 83h 40m total
  • London to Siem Reap
Search Deals
7/10
  • 7/10
  • 2 total stops
  • 23h 45m total
  • London to Siem Reap
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£89 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 17 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

£643

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

£683

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

£686

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

£765

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Thu 27/8

23:55-21:30

2 stops39h 35m

Siem Reap–Angkor Intl

Mon 7/9

12:55-12:35

2 stops29h 40m

£766

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

£803

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

£809

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

£812

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Wed 2/9

22:00-20:10

2 stops40h 10m

Siem Reap–Angkor Intl

Wed 23/9

21:10-15:00

3 stops47h 50m

£898
Fastest return journey

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

£928

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.

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 17 July 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
1,573 reviews
Check prices

Boarding

8.3

Food

7.8

Overall

8.2

Crew

8.6

Comfort

8.0

Entertainment

8.1

Reviews

1 / 20
10.0
Excellent

Wee Keng,May 2026

SIN - MNL

Was upgraded to Premium Economy seat as PPS member. SQ steward team prepared birthday cake for a colleague which I requested and didn’t follow up. Great service and a great way to fly.
Singapore Airlines
8.2
Very Good
1,573 reviews
Singapore Airlines
8.2
Very Good
1,573 reviews
Check prices

Boarding

8.3

Food

7.8

Overall

8.2

Crew

8.6

Comfort

8.0

Entertainment

8.1

Reviews

1 / 20
10.0
Excellent

Wee Keng,May 2026

SIN - MNL

Was upgraded to Premium Economy seat as PPS member. SQ steward team prepared birthday cake for a colleague which I requested and didn’t follow up. Great service and a great way to fly.

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 24h 55m. SWISS provides one of the quickest options available for as low as £765. 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 17 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest£717Average£1,054FlexibilityNo 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?

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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