How long is the flight from United Kingdom to Siem Reap?

A quick flight from United Kingdom to Siem Reap can take about 26h 30m. China Eastern provides one of the quickest options available for as low as £774. United Kingdom and Siem Reap are separated by a distance of 6106 mi. Both multi-stop and direct flights can be found to your destination and back.

What are the cheapest airlines to fly from United Kingdom to Siem Reap one-way?

One-way options have recently been found by users for as low as £166 on Singapore Airlines. Other airlines that offer cheap prices include Austrian Airlines from £379 and Vietnam Airlines from £421 one-way.

In terms of precipitation, rainfall in 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 Siem Reap when rainfall is around 0.0 mm.

If weather is an important factor for your trip to 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 are the most popular routes from United Kingdom to Siem Reap?

Most travelers choose London Heathrow - Siem Reap–Angkor Intl, London Gatwick - Siem Reap–Angkor Intl or London City - Siem Reap–Angkor Intl when deciding on the best route from United Kingdom to Siem Reap.

What are the most popular airlines that fly from United Kingdom to Siem Reap?

Before booking your flight from United Kingdom to Siem Reap check out the most popular airlines for this route: Singapore Airlines, Vietnam Airlines or British Airways.

What is the cheapest time of day to fly from GB to SAI?

When flying from United Kingdom to Siem Reap, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

What airport do you fly into for flights to Siem Reap from United Kingdom?

Siem Reap–Angkor Intl (SAI) is the airport you will fly into if you book a flight from United Kingdom to Siem Reap. It is only a 24.7 mi journey from Siem Reap–Angkor Intl (SAI) to Siem Reap’s city center.

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

Yes. In addition to deals on United Kingdom to Siem Reap flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from United Kingdom to Siem Reap?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from United Kingdom to Siem Reap.

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

Yes. Cheapflights offers flight deals from United Kingdom 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.

£312+ Cheap Flights from the United Kingdom to Siem Reap, Cambodia

Cheap flight deals from United Kingdom to Siem Reap

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

Cheapest flights from United Kingdom to Siem Reap
Explore the most affordable flight options available from United Kingdom to Siem Reap. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 3 November 2026.

Tue 10/1121:00 -

2 stops40h 05m

Sat 5/1221:05 -

2 stops51h 25m

Deal found 29/10£620

Tue 10/1121:00 -

2 stops40h 05m

Thu 3/1221:05 -

2 stops40h 20m

Deal found 1/11£622

Wed 9/1207:55 -

3 stops27h 35m

Thu 24/1219:05 -

2 stops25h 55m

Deal found 1/11£623

Wed 9/1207:55 -

3 stops27h 35m

Sun 20/1219:05 -

2 stops25h 55m

Deal found 1/11£626

Sun 29/1121:00 -

2 stops40h 05m

Sun 6/1221:05 -

2 stops27h 25m

Deal found 30/10£630

Wed 9/1209:00 -

3 stops26h 30m

Thu 24/1219:05 -

2 stops29h 40m

Deal found 1/11£656

Wed 9/1209:00 -

3 stops26h 30m

Sun 20/1219:05 -

2 stops30h 10m

Deal found 1/11£656

Sun 6/1205:55 -

2 stops28h 00m

Sun 13/1211:50 -

1 stop34h 15m

Deal found 1/11£659

Sun 29/1110:40 -

2 stops24h 25m

Sun 6/1219:05 -

2 stops43h 05m

Deal found 30/10£671

Sat 14/1109:50 -

2 stops21h 25m

Fri 4/1219:05 -

2 stops25h 55m

Deal found 30/10£690

Wed 9/1215:55 -

2 stops39h 55m

Mon 28/1212:10 -

1 stop28h 05m

Deal found 1/11£691

Thu 3/1208:30 -

2 stops27h 00m

Wed 16/1209:55 -

2 stops28h 45m

Deal found 1/11£693

Best flights from United Kingdom to Siem Reap
Discover carefully curated flight deals from United Kingdom to Siem Reap that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 3 November 2026.

Fri 15/110:30 -

2 stops26h 10m

Tue 26/122:25 -

2 stops22h 35m

Deal found 28/10£629

Fri 15/110:30 -

3 stops26h 35m

Tue 26/121:05 -

2 stops40h 25m

Deal found 28/10£671

Fri 30/420:45 -

2 stops40h 00m

Sun 30/519:20 -

2 stops47h 40m

Deal found 30/10£767

Tue 10/1111:00 -

1 stop26h 30m

Thu 3/1220:30 -

1 stop17h 45m

Deal found 29/10£774

Fri 15/114:05 -

2 stops24h 05m

Tue 26/123:50 -

2 stops25h 25m

Deal found 28/10£782

Thu 3/1221:20 -

1 stop14h 10m

Mon 14/1219:25 -

1 stop17h 00m

Deal found 30/10£899

Tue 10/1120:35 -

1 stop36h 25m

Sat 5/1216:50 -

1 stop44h 05m

Deal found 2/11£923

Mon 8/316:20 -

2 stops33h 25m

Mon 29/319:25 -

2 stops44h 20m

Deal found 2/11£967

Wed 9/1208:05 -

3 stops27h 25m

Thu 24/1217:55 -

2 stops26h 05m

Deal found 1/11£729

Fri 30/420:45 -

2 stops40h 00m

Sat 29/515:10 -

2 stops21h 45m

Deal found 30/10£767

Tue 23/220:50 -

2 stops41h 20m

Thu 11/323:50 -

2 stops42h 50m

Deal found 29/10£844

Tue 10/1111:00 -

1 stop26h 30m

Sat 5/1221:30 -

2 stops40h 45m

Deal found 30/10£861

Fri 30/420:45 -

2 stops30h 15m

Thu 3/615:10 -

2 stops21h 45m

Deal found 30/10£802

Fri 15/121:00 -

2 stops40h 05m

Tue 26/119:05 -

2 stops29h 45m

Deal found 28/10£814

Wed 10/208:50 -

2 stops29h 20m

Thu 25/223:50 -

2 stops37h 45m

Deal found 1/11£849

Wed 9/1208:05 -

3 stops27h 25m

Tue 29/1220:30 -

3 stops23h 55m

Deal found 1/11£820

Thu 7/111:00 -

1 stop26h 30m

Wed 20/1019:40 -

1 stop27h 15m

Deal found 31/10£928

Fri 1/109:40 -

2 stops28h 30m

Tue 2/313:20 -

2 stops24h 20m

Deal found 30/10£857

Thu 11/313:50 -

2 stops21h 55m

Fri 26/319:25 -

2 stops47h 35m

Deal found 31/10£876

Fri 13/1117:20 -

2 stops32h 55m

Sun 22/1119:25 -

2 stops21h 30m

Deal found 31/10£1,066

Wed 2/1206:00 -

3 stops29h 05m

Wed 9/1219:25 -

2 stops23h 30m

Deal found 2/11£836

Tue 8/1211:00 -

2 stops22h 55m

Sun 20/1217:55 -

1 stop20h 20m

Deal found 30/10£933

Thu 1/421:45 -

2 stops41h 45m

Tue 20/423:50 -

2 stops25h 50m

Deal found 29/10£864

Thu 3/1223:55 -

2 stops38h 15m

Mon 14/1213:20 -

2 stops29h 20m

Deal found 30/10£870

Sun 14/213:50 -

2 stops21h 55m

Sun 28/209:55 -

2 stops27h 20m

Deal found 1/11£961

Sat 2/111:00 -

1 stop26h 30m

Sat 23/1017:20 -

2 stops30h 30m

Deal found 31/10£970

Sat 14/1107:35 -

3 stops28h 45m

Sat 21/1123:50 -

2 stops24h 10m

Deal found 1/11£950

Fri 1/120:15 -

2 stops17h 55m

Sat 6/323:50 -

2 stops25h 25m

Deal found 30/10£880

Wed 6/111:00 -

2 stops23h 40m

Tue 19/1018:05 -

1 stop28h 50m

Deal found 31/10£983

Fri 12/208:15 -

2 stops21h 25m

Sun 28/209:55 -

2 stops27h 20m

Deal found 1/11£1,011

Find flight deals from United Kingdom to Siem Reap

Round-trip from	£623
One-way from	£312
Popular in	December
Cheapest in	July
Average price	£777

9/12-24/12
5 total stops
53h 30m total
United Kingdom to Siem Reap

Search Deals

12/11-31/12
3 total stops
39h 20m total
United Kingdom to Siem Reap

Search Deals

Highest demand for flights based on searches. 7% potential increase in price (£50 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£22 potential savings vs. average return price).

Search Deals

Average for round-trip flights in November 2026

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from the United Kingdom to Siem Reap that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonSiem Reap

LTN London Luton - SAI Siem Reap–Angkor Intl

LTNSAI

London Luton

Thu 12/11

18:00-20:05

3 stops43h 05m

Siem Reap–Angkor Intl

Wed 31/12

00:00-18:00

Nonstop0h 00m

£323

LondonSiem Reap

STN London Stansted - SAI Siem Reap–Angkor Intl

STNSAI

London Stansted

Sat 14/11

17:00-16:05

3 stops40h 05m

Siem Reap–Angkor Intl

Wed 31/12

00:00-18:00

Nonstop0h 00m

£344

ManchesterSiem Reap

MAN Manchester - SAI Siem Reap–Angkor Intl

MANSAI

Manchester

Mon 1/3

21:35-16:55

3 stops36h 20m

Siem Reap–Angkor Intl

Wed 31/12

00:00-18:00

Nonstop0h 00m

£345

ManchesterSiem Reap

MAN Manchester - SAI Siem Reap–Angkor Intl

MANSAI

Manchester

Sun 7/3

15:35-14:50

3 stops40h 15m

Siem Reap–Angkor Intl

Wed 31/12

00:00-18:00

Nonstop0h 00m

£351

LondonSiem Reap

LGW London Gatwick - SAI Siem Reap–Angkor Intl

LGWSAI

London Gatwick

Thu 7/1

12:15-16:55

3 stops45h 40m

Siem Reap–Angkor Intl

Wed 31/12

00:00-18:00

Nonstop0h 00m

£359

ManchesterSiem Reap

MAN Manchester - SAI Siem Reap–Angkor Intl

MANSAI

Manchester

Thu 11/2

14:55-18:05

3 stops44h 10m

Siem Reap–Angkor Intl

Wed 31/12

00:00-18:00

Nonstop0h 00m

£366

LondonSiem Reap

LTN London Luton - SAI Siem Reap–Angkor Intl

LTNSAI

London Luton

Tue 5/1

09:10-20:25

3 stops52h 15m

Siem Reap–Angkor Intl

Wed 31/12

00:00-18:00

Nonstop0h 00m

£367

LondonSiem Reap

LGW London Gatwick - SAI Siem Reap–Angkor Intl

LGWSAI

London Gatwick

Wed 9/12

06:10-18:05

3 stops28h 55m

Siem Reap–Angkor Intl

Wed 31/12

00:00-18:00

Nonstop0h 00m

£372

LondonSiem Reap

STN London Stansted - SAI Siem Reap–Angkor Intl

STNSAI

London Stansted

Wed 6/1

08:05-20:25

3 stops29h 20m

Siem Reap–Angkor Intl

Wed 31/12

00:00-18:00

Nonstop0h 00m

£380

LondonSiem Reap

STN London Stansted - SAI Siem Reap–Angkor Intl

STNSAI

London Stansted

Tue 10/11

07:15-18:30

3 stops28h 15m

Siem Reap–Angkor Intl

Wed 31/12

00:00-18:00

Nonstop0h 00m

£380

Flights are sorted by cheapest return flights first.

Deals found on 30/10

Showing 1-10 of 60 resultsSorted by cheapest first

...

Best time to book a flight from United Kingdom to Siem Reap

Have a flexible travel schedule? Discover the best time to fly to Siem Reap from United Kingdom with our price prediction graph.

LGW-SAI

MAN-SAI

LHR-SAI

STN-SAI

EDI-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 the United Kingdom to Siem Reap

GB0-SAI

LGW-SAI

MAN-SAI

LHR-SAI

STN-SAI

What is the cheapest month to book a flight from United Kingdom to Siem Reap?

Currently, June is the cheapest month in which you can book a flight from United Kingdom to Siem Reap (average of £719). Flying from United Kingdom to Siem Reap in December is currently the most expensive (average of £1,049). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Siem Reap

Read through reviews of airlines operating flights from the United Kingdom to Siem Reap, such as Singapore Airlines,Thai Airways, andVietnam Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Singapore Airlines

8.2

Very Good

1,635 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Sanku,Jul 2026

TRV - SIN

Very bad, not able check in using the email link. Very bad quality food. No TV in front of the seats.

Singapore Airlines

8.2

Very Good

1,635 reviews

Singapore Airlines

8.2

Very Good

1,635 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Sanku,Jul 2026

TRV - SIN

Very bad, not able check in using the email link. Very bad quality food. No TV in front of the seats.

Thai Airways

7.9

Good

433 reviews

Singapore Airlines

8.2

Very Good

1,635 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Sanku,Jul 2026

TRV - SIN

Very bad, not able check in using the email link. Very bad quality food. No TV in front of the seats.

Vietnam Airlines

7.7

Good

294 reviews

Singapore Airlines

8.2

Very Good

1,635 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Sanku,Jul 2026

TRV - SIN

Very bad, not able check in using the email link. Very bad quality food. No TV in front of the seats.

Etihad Airways

7.3

Good

1,557 reviews

Singapore Airlines

8.2

Very Good

1,635 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Sanku,Jul 2026

TRV - SIN

Very bad, not able check in using the email link. Very bad quality food. No TV in front of the seats.

British Airways

6.7

Okay

8,279 reviews

Singapore Airlines

8.2

Very Good

1,635 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Sanku,Jul 2026

TRV - SIN

Very bad, not able check in using the email link. Very bad quality food. No TV in front of the seats.

Related info for your journey

What airport do you fly into for flights to Siem Reap from United Kingdom?
Siem Reap–Angkor Intl (SAI) is the airport you will fly into if you book a flight from United Kingdom to Siem Reap. It is only a 24.7 mi journey from Siem Reap–Angkor Intl (SAI) to Siem Reap’s city center.
How long is the flight from United Kingdom to Siem Reap?
A quick flight from United Kingdom to Siem Reap can take about 26h 30m. China Eastern provides one of the quickest options available for as low as £774. United Kingdom and Siem Reap are separated by a distance of 6106 mi. Both multi-stop and direct flights can be found to your destination and back.
What are the cheapest airlines to fly from United Kingdom to Siem Reap one-way?
One-way options have recently been found by users for as low as £166 on Singapore Airlines. Other airlines that offer cheap prices include Austrian Airlines from £379 and Vietnam Airlines from £421 one-way.
What are the most popular routes from United Kingdom to Siem Reap?
Most travelers choose London Heathrow - Siem Reap–Angkor Intl, London Gatwick - Siem Reap–Angkor Intl or London City - Siem Reap–Angkor Intl when deciding on the best route from United Kingdom to Siem Reap.
Can I find deals for flights from United Kingdom to Siem Reap that include hotel bookings?
Yes. In addition to deals on United Kingdom to Siem Reap flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from United Kingdom to Siem Reap?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from United Kingdom to Siem Reap.
Can I find deals for business class flights from United Kingdom to Siem Reap?
Yes. Cheapflights offers flight deals from United Kingdom 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.
What is the cheapest month to book a flight from United Kingdom to Siem Reap?
Currently, June is the cheapest month in which you can book a flight from United Kingdom to Siem Reap (average of £719). Flying from United Kingdom to Siem Reap in December is currently the most expensive (average of £1,049). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Alternative routes

Complete your trip

Flights by cabin class

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Alternative routes for United Kingdom to Siem Reap

Heathrow to Siem Reap flights

Gatwick to Siem Reap flights

London City to Siem Reap flights

Stansted to Siem Reap flights

Luton to Siem Reap flights

Manchester to Siem Reap flights

Birmingham to Siem Reap flights

Edinburgh to Siem Reap flights

Glasgow Intl to Siem Reap flights

Top 5 airlines flying from United Kingdom to Siem Reap

Airline	Cheapest	Average	Flexibility	On-time
Etihad Airways	Cheapest£548	Average£754	FlexibilityNo cancel fee	On-time75%	Search Etihad Airways flights
Singapore Airlines	Cheapest£572	Average£888	FlexibilityNo cancel fee	On-time81%	Search Singapore Airlines flights
Vietnam Airlines	Cheapest£744	Average£817	FlexibilityNo cancel fee	On-time81%	Search Vietnam Airlines flights
Emirates	Cheapest£854	Average£875	FlexibilityNo cancel fee	On-time75%	Search Emirates flights
Thai Airways	Cheapest£892	Average£1,024	FlexibilityNo cancel fee	On-time77%	Search Thai Airways flights

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

Cheapflights helps you search for flights from United Kingdom to Siem Reap via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Siem Reap from United Kingdom.

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

Yes! Cheapflights helps users easily find flights from United Kingdom to Siem Reap with no change fees.

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Cheap flights from the United Kingdom to Siem Reap, Cambodia from £312

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from United Kingdom to Siem Reap

Cheapest flights from United Kingdom to Siem ReapExplore the most affordable flight options available from United Kingdom to Siem Reap. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 3 November 2026.

Explore the most affordable flight options available from United Kingdom to Siem Reap. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 3 November 2026.

Best flights from United Kingdom to Siem ReapDiscover carefully curated flight deals from United Kingdom to Siem Reap that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 3 November 2026.

Discover carefully curated flight deals from United Kingdom to Siem Reap that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 3 November 2026.

Last-minute flights from United Kingdom to Siem ReapDiscover last-minute flight deals from United Kingdom to Siem Reap. Data last updated 3 November 2026 and is based on user searches.

Discover last-minute flight deals from United Kingdom to Siem Reap. Data last updated 3 November 2026 and is based on user searches.

One-way flights from United Kingdom to Siem ReapSearch for one-way flight options from United Kingdom to Siem Reap. Find affordable one-way fares based on user searches. Data last updated 3 November 2026.

Search for one-way flight options from United Kingdom to Siem Reap. Find affordable one-way fares based on user searches. Data last updated 3 November 2026.

Find flight deals from United Kingdom 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 the United Kingdom to Siem Reap that are best for you.

Best time to book a flight from United Kingdom to Siem Reap

Have a flexible travel schedule? Discover the best time to fly to Siem Reap from United Kingdom with our price prediction graph.

Cheapflights Insights

What is the cheapest month to book a flight from United Kingdom to Siem Reap?

Reviews of airlines servicing Siem Reap

Read through reviews of airlines operating flights from the United Kingdom to Siem Reap, such as Singapore Airlines,Thai Airways, andVietnam Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

What airport do you fly into for flights to Siem Reap from United Kingdom?

How long is the flight from United Kingdom to Siem Reap?

What are the cheapest airlines to fly from United Kingdom to Siem Reap one-way?

What are the most popular routes from United Kingdom to Siem Reap?

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

How can I find direct flights from United Kingdom to Siem Reap?

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

What is the cheapest month to book a flight from United Kingdom 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 United Kingdom 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.

Search flights from United Kingdom to Siem Reap by cabin class

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

United Kingdom and Siem Reap flights

Browse other United Kingdom and Siem Reap flight options. Last updated on 3 November 2026.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2026

Top 5 airlines flying from United Kingdom to Siem Reap

Fly with Cheapflights

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

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

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

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

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Travel Smart

Cheapest flights from United Kingdom to Siem Reap
Explore the most affordable flight options available from United Kingdom to Siem Reap. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 3 November 2026.

Best flights from United Kingdom to Siem Reap
Discover carefully curated flight deals from United Kingdom to Siem Reap that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 3 November 2026.

Last-minute flights from United Kingdom to Siem Reap
Discover last-minute flight deals from United Kingdom to Siem Reap. Data last updated 3 November 2026 and is based on user searches.

One-way flights from United Kingdom to Siem Reap
Search for one-way flight options from United Kingdom to Siem Reap. Find affordable one-way fares based on user searches. Data last updated 3 November 2026.