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Cheap flights from London Gatwick Airport to Siem Reap from £355

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 22/9. Fares are subject to change and may not be available on all flights or dates of travel.
LGW — SAI
19 May — 26 May1
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 April 2026.

Mon 1/608:40
LGW
-
SAI
3 stops30h 50m
Multiple Airlines
Mon 15/619:35
SAI
-
LGW
2 stops41h 20m
Multiple Airlines
Deal found 16/4£634
Mon 18/506:55
LGW
-
SAI
3 stops25h 55m
Multiple Airlines
Mon 25/515:35
SAI
-
LGW
2 stops34h 10m
Multiple Airlines
Deal found 18/4£715
Wed 6/509:45
LGW
-
SAI
3 stops29h 45m
Multiple Airlines
Sat 6/617:20
SAI
-
LGW
2 stops34h 10m
Multiple Airlines
Deal found 17/4£717
Thu 23/421:45
LGW
-
SAI
2 stops41h 45m
Emirates
Tue 5/523:50
SAI
-
LGW
2 stops37h 30m
Emirates
Deal found 16/4£725
Sun 19/421:45
LGW
-
SAI
2 stops41h 45m
Emirates
Tue 5/523:50
SAI
-
LGW
2 stops25h 55m
Emirates
Deal found 16/4£743
Mon 18/521:45
LGW
-
SAI
2 stops17h 45m
Emirates
Mon 25/513:05
SAI
-
LGW
2 stops29h 30m
Emirates
Deal found 18/4£744
Mon 1/621:45
LGW
-
SAI
2 stops17h 45m
Emirates
Mon 15/612:55
SAI
-
LGW
2 stops29h 40m
Emirates
Deal found 16/4£746
Tue 1/910:25
LGW
-
SAI
2 stops22h 25m
Multiple Airlines
Sat 10/1015:35
SAI
-
LGW
2 stops21h 50m
Multiple Airlines
Deal found 16/4£749
Mon 27/414:35
LGW
-
SAI
2 stops24h 55m
Emirates
Mon 18/513:05
SAI
-
LGW
2 stops29h 30m
Emirates
Deal found 14/4£753
Wed 29/414:35
LGW
-
SAI
2 stops24h 55m
Emirates
Mon 25/513:05
SAI
-
LGW
2 stops29h 30m
Emirates
Deal found 18/4£756

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 19 April 2026.

Round-trip from

£634

One-way from

£355

Popular in

December

Cheapest in

September

Average price

£795
1/6-15/6
  • 1/6-15/6
  • 5 total stops
  • 72h 10m total
  • London to Siem Reap
Search Deals
22/9
  • 22/9
  • 2 total stops
  • 23h 30m total
  • London to Siem Reap
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£52 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 April 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 April 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

Wed 29/4

14:35-21:30

2 stops24h 55m

Siem Reap–Angkor Intl

Mon 25/5

13:05-07:20

2 stops24h 15m

£756

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Fri 8/5

14:35-21:30

2 stops24h 55m

Siem Reap–Angkor Intl

Mon 18/5

13:05-12:35

2 stops29h 30m

£772

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Wed 6/5

14:35-21:30

2 stops24h 55m

Siem Reap–Angkor Intl

Sat 6/6

23:50-19:45

2 stops25h 55m

£788
Fastest return journey

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Sat 9/5

10:05-12:20

2 stops20h 15m

Siem Reap–Angkor Intl

Mon 18/5

13:05-07:20

2 stops24h 15m

£805

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Thu 30/4

14:35-12:20

2 stops39h 45m

Siem Reap–Angkor Intl

Tue 26/5

23:50-21:30

2 stops27h 40m

£822

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Thu 30/4

14:35-12:20

2 stops39h 45m

Siem Reap–Angkor Intl

Mon 25/5

13:05-12:35

2 stops29h 30m

£823
Cheapest one-way

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Thu 21/5

06:20-19:05

3 stops30h 45m

£401

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Sat 5/9

18:00-09:00

2 stops33h 00m

£420
Fastest single journey

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Tue 26/5

09:15-16:10

2 stops24h 55m

£420

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Thu 30/4

06:00-11:10

2 stops47h 10m

£445

Flights are sorted by cheapest return flights first.

Deals found on 18/4

Showing 1-10 of 16 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 19 April 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
1,499 reviews
Check prices

Overall

8.2

Crew

8.6

Food

7.8

Boarding

8.3

Entertainment

8.0

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Wee Keng,Dec 2025

HKG - SIN

Quick 3 hour flight with excellent service from the crew despite it being Christmas Day holiday. Ground crew passed out Xmas cookies as well. Great experience.
Singapore Airlines
8.2
Very Good
1,499 reviews
Singapore Airlines
8.2
Very Good
1,499 reviews
Check prices

Overall

8.2

Crew

8.6

Food

7.8

Boarding

8.3

Entertainment

8.0

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Wee Keng,Dec 2025

HKG - SIN

Quick 3 hour flight with excellent service from the crew despite it being Christmas Day holiday. Ground crew passed out Xmas cookies as well. Great experience.

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. Emirates provides one of the quickest options available for as low as £756. Airlines will cover a distance of 6102 mi.

  • 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 19 April 2026.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest£711Average£1,051FlexibilityNo 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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