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 19h 55m. SWISS provides one of the quickest options available for as low as £762. Airlines will cover a distance of 6102 mi. This flight may include one or multiple stops.

In terms of precipitation, rainfall in Region of Siem Reap ranges from 0.0 - 260.0 inches per month. September is typically the wettest month, when rainfall can reach 260.0 mm. January is typically the driest time to visit Region of Siem Reap when rainfall is around 0.0 mm.

If weather is an important factor for your trip to Region of Siem Reap, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 29.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 24.0 C).

What is the cheapest time of day to fly from LGW to SI?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Gatwick Airport to Region of Siem Reap as you normally would.

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.

£339+ Cheap Flights from London Gatwick Airport to Siem Reap

Cheap flight deals from Gatwick to Siem Reap

Enter your travel dates to find the best prices.

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Best

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One-way

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 21 September 2026.

Fri 6/1110:30 -

3 stops27h 30m

Sat 14/1122:00 -

2 stops47h 00m

Deal found 18/9£592

Thu 24/911:35 -

2 stops26h 35m

Wed 7/1021:10 -

2 stops39h 30m

Deal found 20/9£593

Tue 10/1107:10 -

3 stops25h 55m

Thu 26/1112:45 -

2 stops24h 45m

Deal found 16/9£633

Thu 24/918:00 -

3 stops35h 10m

Wed 7/1019:05 -

2 stops25h 55m

Deal found 17/9£675

Find flight deals from Gatwick to Siem Reap

Round-trip from	£592
One-way from	£339
Popular in	December
Cheapest in	July
Average price	£771

China Eastern
6/11-14/11
5 total stops
74h 30m total
London to Siem Reap

Search Deals

8/12-31/12
3 total stops
43h 00m 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 (£23 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2026

Search Deals

Cheapflights Fare Finder

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 London Gatwick - SAI Siem Reap–Angkor Intl

LGWSAI

London Gatwick

Wed 28/10

17:25-12:05

3 stops35h 40m

Siem Reap–Angkor Intl

Wed 31/12

00:00-18:00

Nonstop0h 00m

£378

LondonSiem Reap

LGW London Gatwick - SAI Siem Reap–Angkor Intl

LGWSAI

London Gatwick

Sat 28/11

10:30-20:05

3 stops26h 35m

Siem Reap–Angkor Intl

Wed 31/12

00:00-18:00

Nonstop0h 00m

£393

LondonSiem Reap

LGW London Gatwick - SAI Siem Reap–Angkor Intl

LGWSAI

London Gatwick

Mon 26/10

10:30-20:05

2 stops26h 35m

Siem Reap–Angkor Intl

Wed 31/12

00:00-18:00

Nonstop0h 00m

£397

LondonSiem Reap

LGW London Gatwick - SAI Siem Reap–Angkor Intl

LGWSAI

London Gatwick

Thu 21/1

09:50-17:25

3 stops24h 35m

Siem Reap–Angkor Intl

Wed 31/12

00:00-18:00

Nonstop0h 00m

£433

LondonSiem Reap

LGW London Gatwick - SAI Siem Reap–Angkor Intl

LGWSAI

London Gatwick

Tue 27/10

10:30-16:55

3 stops23h 25m

Siem Reap–Angkor Intl

Wed 31/12

00:00-18:00

Nonstop0h 00m

£446

LondonSiem Reap

LGW London Gatwick - SAI Siem Reap–Angkor Intl

LGWSAI

London Gatwick

Tue 2/2

08:40-18:45

2 stops27h 05m

Siem Reap–Angkor Intl

Wed 31/12

00:00-18:00

Nonstop0h 00m

£470

LondonSiem Reap

LGW London Gatwick - SAI Siem Reap–Angkor Intl

LGWSAI

London Gatwick

Wed 20/1

09:50-16:05

1 stop23h 15m

Siem Reap–Angkor Intl

Wed 31/12

00:00-18:00

Nonstop0h 00m

£499

LondonSiem Reap

LGW London Gatwick - SAI Siem Reap–Angkor Intl

LGWSAI

London Gatwick

Sat 14/11

08:40-18:30

2 stops50h 50m

Siem Reap–Angkor Intl

Wed 31/12

00:00-18:00

Nonstop0h 00m

£556

LondonSiem Reap

LGW London Gatwick - SAI Siem Reap–Angkor Intl

LGWSAI

London Gatwick

Tue 10/11

13:05-09:55

1 stop37h 50m

Siem Reap–Angkor Intl

Wed 31/12

00:00-18:00

Nonstop0h 00m

£594

Fastest return journey

LondonSiem Reap

LGW London Gatwick - SAI Siem Reap–Angkor Intl

LGWSAI

London Gatwick

Mon 26/10

13:05-16:00

1 stop19h 55m

Siem Reap–Angkor Intl

Wed 31/12

00:00-18:00

Nonstop0h 00m

£603

Flights are sorted by cheapest return flights first.

Deals found on 20/9

Showing 1-10 of 22 resultsSorted by cheapest first

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.

LGW-SAI

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

LGW-KHSI

LGW-SAI

No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Siem Reap

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

1,606 reviews

Check prices

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

1,606 reviews

Singapore Airlines

8.2

Very Good

1,606 reviews

Check prices

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

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 19h 55m. SWISS provides one of the quickest options available for as low as £762. 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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Alternative routes for Gatwick to Siem Reap

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Heathrow to Krong Preah Sihanouk flights

Top airline flying from Gatwick to Siem Reap

Airline	Cheapest	Average	Flexibility	On-time
Singapore Airlines	Cheapest£723	Average£1,063	FlexibilityNo cancel fee	On-time81%	Search Singapore Airlines flights

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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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Cheap flights from London Gatwick Airport to Siem Reap from £339

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/12. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Gatwick to Siem Reap

Cheapest flights from Gatwick to Siem ReapExplore 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 21 September 2026.

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 21 September 2026.

Best flights from Gatwick to Siem ReapDiscover carefully curated flight deals from Gatwick to Siem Reap that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 21 September 2026.

Discover carefully curated flight deals from Gatwick to Siem Reap that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 21 September 2026.

Last-minute flights from Gatwick to Siem ReapDiscover last-minute flight deals from Gatwick to Siem Reap. Data last updated 21 September 2026 and is based on user searches.

Discover last-minute flight deals from Gatwick to Siem Reap. Data last updated 21 September 2026 and is based on user searches.

One-way flights from Gatwick to Siem ReapSearch for one-way flight options from Gatwick to Siem Reap. Find affordable one-way fares based on user searches. Data last updated 21 September 2026.

Search for one-way flight options from Gatwick to Siem Reap. Find affordable one-way fares based on user searches. Data last updated 21 September 2026.

Find flight deals from Gatwick to Siem Reap

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Gatwick Airport to Siem Reap that are best for you.

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.

Cheapflights Insights

Reviews of airlines servicing Siem Reap

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.

Related info for your journey

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

Can I find deals for flights from Gatwick to Siem Reap that include hotel bookings?

How can I find direct flights from Gatwick to Siem Reap?

Can I find deals for business class flights from Gatwick to Siem Reap?

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.

Alternative routes for Gatwick to Siem Reap

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Siem Reap by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to

Book a non-stop flight to one of these other cities located in .

Search flights from Gatwick to Siem Reap by cabin class

Find flights from Gatwick to Siem Reap, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Gatwick and Siem Reap flights

Browse other Gatwick and Siem Reap flight options. Last updated on 21 September 2026.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2026

Top airline flying from Gatwick to Siem Reap

Fly with Cheapflights

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

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

Can Cheapflights find flights from Gatwick to Siem Reap with no change fees?

Can Cheapflights notify me if prices for flights from Gatwick to Siem Reap become cheaper?

100% Free

Book with Flexibility

Travel Smart

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 21 September 2026.

Best flights from Gatwick to Siem Reap
Discover carefully curated flight deals from Gatwick to Siem Reap that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 21 September 2026.

Last-minute flights from Gatwick to Siem Reap
Discover last-minute flight deals from Gatwick to Siem Reap. Data last updated 21 September 2026 and is based on user searches.

One-way flights from Gatwick to Siem Reap
Search for one-way flight options from Gatwick to Siem Reap. Find affordable one-way fares based on user searches. Data last updated 21 September 2026.