Find flights
When to book
Airlines
FAQs

Cheap flights from London Gatwick Airport to Siem Reap from £301

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 9/9. Fares are subject to change and may not be available on all flights or dates of travel.
LGW — SAI
30 Aug — 6 Sep1
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 31 July 2026.

Fri 27/1110:30
LGW
-
SAI
3 stops27h 30m
China Eastern
Sat 12/1222:00
SAI
-
LGW
3 stops39h 30m
China Eastern
Deal found 29/7£592
Wed 28/1010:30
LGW
-
SAI
2 stops26h 10m
Multiple Airlines
Tue 10/1122:00
SAI
-
LGW
2 stops39h 30m
Multiple Airlines
Deal found 30/7£595
Mon 9/1110:30
LGW
-
SAI
3 stops27h 30m
China Eastern
Tue 24/1122:00
SAI
-
LGW
3 stops39h 30m
China Eastern
Deal found 29/7£618
Mon 23/1108:35
LGW
-
SAI
2 stops27h 10m
SWISS
Mon 7/1209:55
SAI
-
LGW
2 stops28h 50m
SWISS
Deal found 31/7£639
Wed 30/918:00
LGW
-
SAI
3 stops44h 10m
China Eastern
Wed 21/1021:10
SAI
-
LGW
3 stops39h 30m
China Eastern
Deal found 27/7£642
Sat 12/922:00
LGW
-
SAI
2 stops28h 45m
Multiple Airlines
Sat 21/1122:00
SAI
-
LGW
3 stops39h 30m
Multiple Airlines
Deal found 27/7£647
Wed 30/1210:30
LGW
-
SAI
2 stops26h 10m
Multiple Airlines
Sun 28/218:50
SAI
-
LGW
2 stops26h 10m
Multiple Airlines
Deal found 30/7£685
Fri 27/1111:35
LGW
-
SAI
2 stops24h 10m
Multiple Airlines
Sat 12/1213:20
SAI
-
LGW
2 stops23h 20m
Multiple Airlines
Deal found 29/7£689
Sat 29/811:35
LGW
-
SAI
2 stops24h 30m
Multiple Airlines
Sat 5/919:05
SAI
-
LGW
3 stops30h 10m
Multiple Airlines
Deal found 30/7£703
Thu 19/1106:30
LGW
-
SAI
3 stops26h 35m
Multiple Airlines
Thu 3/1213:20
SAI
-
LGW
2 stops24h 00m
Multiple Airlines
Deal found 28/7£705

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 31 July 2026.

Round-trip from

£592

One-way from

£301

Popular in

December

Cheapest in

July

Average price

£624
China Eastern
  • China Eastern
  • 27/11-12/12
  • 6 total stops
  • 67h 00m total
  • London to Siem Reap
Search Deals
9/9
  • 9/9
  • 3 total stops
  • 52h 40m total
  • London to Siem Reap
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£74 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£27 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 31 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

Wed 11/11

20:25-21:10

2 stops17h 45m

Siem Reap–Angkor Intl

Tue 24/11

23:50-11:40

2 stops18h 50m

£802

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Wed 19/8

23:55-12:15

2 stops30h 20m

Siem Reap–Angkor Intl

Wed 16/9

12:55-07:20

2 stops24h 25m

£805

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Wed 2/9

21:45-21:30

2 stops17h 45m

Siem Reap–Angkor Intl

Wed 23/9

12:55-07:20

2 stops24h 25m

£809

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Mon 14/9

14:35-21:30

2 stops24h 55m

Siem Reap–Angkor Intl

Sun 27/9

12:55-12:35

2 stops29h 40m

£833
Fastest return journey

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Thu 3/12

21:20-18:45

1 stop14h 25m

Siem Reap–Angkor Intl

Mon 14/12

19:25-05:25

1 stop17h 00m

£898

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Wed 19/8

07:25-09:00

2 stops19h 35m

Siem Reap–Angkor Intl

Wed 16/9

19:35-09:55

2 stops20h 20m

£904

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Wed 19/8

07:25-12:15

2 stops22h 50m

Siem Reap–Angkor Intl

Wed 16/9

19:35-09:55

2 stops20h 20m

£905
Cheapest one-way

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Thu 20/8

11:35-17:10

2 stops23h 35m

£328

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Sun 8/11

17:00-21:00

2 stops45h 00m

£410

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Sat 28/11

18:40-18:45

2 stops41h 05m

£433

Flights are sorted by cheapest return flights first.

Deals found on 29/7

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 31 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
1,584 reviews
Check prices

Overall

8.2

Entertainment

8.1

Boarding

8.3

Crew

8.6

Food

7.8

Comfort

8.0

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
1,584 reviews
Singapore Airlines
8.2
Very Good
1,584 reviews
Check prices

Overall

8.2

Entertainment

8.1

Boarding

8.3

Crew

8.6

Food

7.8

Comfort

8.0

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 14h 25m. Emirates provides one of the quickest options available for as low as £898. 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 31 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest£723Average£1,062FlexibilityNo 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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.