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Cheap flights from London Gatwick Airport to Siem Reap from £404

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 30/8. Fares are subject to change and may not be available on all flights or dates of travel.
LGW — SAI
1 Jul — 8 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 1 June 2026.

Thu 29/1010:30
LGW
-
SAI
2 stops51h 30m
China Eastern
Sat 7/1122:00
SAI
-
LGW
2 stops47h 00m
China Eastern
Deal found 29/5£617
Thu 29/1010:30
LGW
-
SAI
2 stops51h 30m
China Eastern
Thu 5/1122:00
SAI
-
LGW
3 stops47h 00m
China Eastern
Deal found 29/5£667
Tue 3/1110:30
LGW
-
SAI
2 stops26h 30m
Multiple Airlines
Mon 9/1120:45
SAI
-
LGW
1 stop24h 00m
Multiple Airlines
Deal found 29/5£697
Sun 1/1117:00
LGW
-
SAI
2 stops45h 00m
China Eastern
Sat 7/1122:00
SAI
-
LGW
2 stops47h 00m
China Eastern
Deal found 29/5£717
Tue 3/1109:15
LGW
-
SAI
2 stops20h 25m
Multiple Airlines
Tue 10/1123:50
SAI
-
LGW
1 stop25h 15m
Multiple Airlines
Deal found 29/5£721
Tue 3/1109:15
LGW
-
SAI
2 stops23h 45m
Multiple Airlines
Sun 8/1120:45
SAI
-
LGW
1 stop29h 00m
Multiple Airlines
Deal found 29/5£727
Sun 1/1120:25
LGW
-
SAI
2 stops41h 45m
Emirates
Tue 10/1123:50
SAI
-
LGW
2 stops42h 50m
Emirates
Deal found 29/5£734
Wed 4/1120:00
LGW
-
SAI
1 stop17h 00m
Multiple Airlines
Tue 10/1120:45
SAI
-
LGW
1 stop28h 20m
Multiple Airlines
Deal found 29/5£736
Wed 4/1120:00
LGW
-
SAI
1 stop17h 00m
Multiple Airlines
Mon 9/1120:45
SAI
-
LGW
1 stop24h 00m
Multiple Airlines
Deal found 29/5£737
Wed 4/1120:00
LGW
-
SAI
1 stop17h 00m
Multiple Airlines
Sun 8/1120:45
SAI
-
LGW
1 stop29h 00m
Multiple Airlines
Deal found 29/5£749

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 1 June 2026.

Round-trip from

£617

One-way from

£404

Popular in

December

Cheapest in

September

Average price

£845
China Eastern
  • China Eastern
  • 29/10-7/11
  • 4 total stops
  • 98h 30m total
  • London to Siem Reap
Search Deals
30/8
  • 30/8
  • 2 total stops
  • 24h 20m total
  • London to Siem Reap
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£49 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 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 1 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 18/6

09:25-18:55

2 stops27h 30m

Siem Reap–Angkor Intl

Thu 2/7

09:40-08:25

2 stops28h 45m

£772

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Wed 19/8

14:35-21:30

2 stops24h 55m

Siem Reap–Angkor Intl

Wed 16/9

12:55-12:35

2 stops29h 40m

£772

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Mon 29/6

14:35-21:30

2 stops24h 55m

Siem Reap–Angkor Intl

Mon 20/7

12:55-07:20

2 stops24h 25m

£776

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Wed 17/6

09:25-18:55

2 stops27h 30m

Siem Reap–Angkor Intl

Wed 1/7

16:00-08:25

2 stops22h 25m

£779

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Thu 25/6

10:05-12:15

2 stops20h 10m

Siem Reap–Angkor Intl

Mon 29/6

12:55-07:20

2 stops24h 25m

£811

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Thu 22/10

11:35-20:10

3 stops26h 35m

Siem Reap–Angkor Intl

Thu 5/11

22:00-06:30

3 stops39h 30m

£819

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Thu 22/10

10:00-15:10

1 stop23h 10m

Siem Reap–Angkor Intl

Thu 5/11

10:45-09:00

1 stop29h 15m

£830

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Thu 22/10

06:20-17:10

2 stops28h 50m

Siem Reap–Angkor Intl

Thu 5/11

09:55-22:25

1 stop19h 30m

£865

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Wed 17/6

09:25-18:55

2 stops27h 30m

Siem Reap–Angkor Intl

Fri 3/7

09:40-08:25

2 stops28h 45m

£871
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 11/11

19:25-05:25

1 stop17h 00m

£943

Flights are sorted by cheapest return flights first.

Deals found on 29/5

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 1 June 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
1,527 reviews
Check prices

Crew

8.6

Food

7.8

Boarding

8.3

Entertainment

8.1

Overall

8.2

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
1,527 reviews
Singapore Airlines
8.2
Very Good
1,527 reviews
Check prices

Crew

8.6

Food

7.8

Boarding

8.3

Entertainment

8.1

Overall

8.2

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 24h 55m. SWISS provides one of the quickest options available for as low as £772. 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 1 June 2026.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest£714Average£1,055FlexibilityNo 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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