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£321+ Cheap flights to Siem Reap, Cambodia

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 30/9. Fares are subject to change and may not be available on all flights or dates of travel.
— SAI
1 Aug — 8 Aug1
1 adult
1 adult, Economy, 0 bags

Flights to Siem Reap, Cambodia in 2026

Enter your travel dates to find the best prices.

Cheapest flights to Siem Reap
Explore the most affordable flight options available to Siem Reap. Find the lowest fares based on data from user searches, with prices last updated on 2 July 2026.

Thu 3/919:30
LHR
-
SAI
2 stops17h 25m
Multiple Airlines
Tue 29/909:40
SAI
-
LHR
2 stops18h 05m
Multiple Airlines
Deal found 28/6£591
Wed 2/909:25
LGW
-
SAI
2 stops27h 30m
SWISS
Thu 1/1009:40
SAI
-
LGW
2 stops28h 45m
SWISS
Deal found 28/6£593
Wed 2/913:50
LHR
-
SAI
2 stops23h 05m
SWISS
Thu 1/1009:40
SAI
-
LHR
2 stops28h 15m
SWISS
Deal found 28/6£594
Sat 31/1018:40
LHR
-
SAI
2 stops32h 10m
SWISS
Mon 9/1109:55
SAI
-
LHR
2 stops18h 45m
SWISS
Deal found 30/6£602
Wed 30/918:40
LHR
-
SAI
2 stops33h 00m
SWISS
Mon 5/1009:40
SAI
-
LHR
2 stops18h 05m
SWISS
Deal found 1/7£603
Wed 30/918:40
LHR
-
SAI
2 stops33h 00m
SWISS
Tue 27/1016:45
SAI
-
LHR
2 stops22h 20m
SWISS
Deal found 27/6£608
Tue 1/909:25
LGW
-
SAI
2 stops27h 30m
SWISS
Thu 1/1009:40
SAI
-
LGW
2 stops28h 45m
SWISS
Deal found 28/6£608
Tue 1/908:45
LHR
-
SAI
2 stops28h 10m
SWISS
Tue 29/909:40
SAI
-
LHR
2 stops31h 40m
SWISS
Deal found 28/6£609
Wed 2/909:15
LCY
-
SAI
2 stops27h 40m
SWISS
Tue 29/909:40
SAI
-
LCY
2 stops29h 00m
SWISS
Deal found 28/6£609
Sat 31/1018:40
LHR
-
SAI
2 stops32h 10m
SWISS
Sat 7/1116:45
SAI
-
LHR
2 stops25h 30m
SWISS
Deal found 30/6£609
Fri 30/1018:40
LHR
-
SAI
2 stops32h 10m
SWISS
Sun 8/1109:55
SAI
-
LHR
2 stops18h 45m
SWISS
Deal found 30/6£617
Tue 1/909:15
LCY
-
SAI
2 stops27h 40m
SWISS
Thu 1/1009:40
SAI
-
LCY
2 stops29h 00m
SWISS
Deal found 28/6£623

Find flight deals to Siem Reap

Find the latest flights to Siem Reap in 2026, with up-to-date prices and availability. In the last 7 days, Cheapflights users made a total of 858,174 searches and data was last updated on 2 July 2026.

Return from

£591

One-way from

£321

Popular in

December

Cheapest in

July

Average price

£631
SWISS
  • SWISS
  • 3/9-1/10
  • 4 total stops
  • 35h 30m total
  • London to Siem Reap
Search Deals
30/9
  • 30/9
  • 3 total stops
  • 35h 45m total
  • London to Siem Reap
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£110 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£38 potential savings vs. average return price).
Search Deals
Average for return flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Locate flights to Siem Reap that fit your budget, with regularly updated fares and availability. In the last 7 days, Cheapflights users made a total of 858,174 searches and data was last updated on 2 July 2026.
Use the filters below to find and compare flights to Siem Reap that are best for you.

Fly from

Route

Depart

Return

Price

Cheapest return flight

LondonSiem Reap

LCY - SAI

LCYSAI

London City

Thu 3/9

13:10-18:55

2 stops23h 45m

Siem Reap–Angkor Intl

Thu 1/10

09:40-08:40

2 stops29h 00m

£609

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Wed 4/11

10:30-21:00

3 stops27h 30m

Siem Reap–Angkor Intl

Thu 26/11

22:00-14:00

3 stops47h 00m

£624

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Mon 31/8

22:00-20:10

2 stops40h 10m

Siem Reap–Angkor Intl

Fri 2/10

21:10-19:15

2 stops52h 05m

£624

LondonSiem Reap

LCY - SAI

LCYSAI

London City

Wed 2/9

13:10-18:55

2 stops23h 45m

Siem Reap–Angkor Intl

Wed 30/9

09:40-08:40

2 stops29h 00m

£648

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Wed 4/11

10:30-21:00

3 stops27h 30m

Siem Reap–Angkor Intl

Sat 21/11

22:00-06:30

2 stops39h 30m

£674

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Fri 6/11

10:30-21:00

3 stops27h 30m

Siem Reap–Angkor Intl

Sat 21/11

22:00-14:00

2 stops47h 00m

£674

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Fri 30/10

10:30-21:00

3 stops27h 30m

Siem Reap–Angkor Intl

Thu 5/11

22:00-06:30

3 stops39h 30m

£674

LondonSiem Reap

LTN - SAI

LTNSAI

London Luton

Tue 1/9

16:10-09:00

3 stops34h 50m

Siem Reap–Angkor Intl

Tue 22/9

12:55-14:35

3 stops31h 40m

£677

LondonSiem Reap

LTN - SAI

LTNSAI

London Luton

Wed 30/9

15:15-09:00

3 stops35h 45m

Siem Reap–Angkor Intl

Mon 5/10

18:05-12:55

2 stops24h 50m

£680

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Sat 7/11

18:40-09:50

2 stops32h 10m

Siem Reap–Angkor Intl

Sat 21/11

09:55-08:05

2 stops29h 10m

£682

Flights are sorted by cheapest return flights first.

Deals found on 29/6

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
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6

Best time to book a flight to Siem Reap

Have a flexible travel schedule? Discover the best time to fly to Siem Reap 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 to Siem Reap

How long is the flight to Siem Reap?

On average, a flight from London to Siem Reap takes 18 hours 36 minutes. Flights to Siem Reap from other popular cities in United Kingdom will vary in length. Below are a few examples of popular routes and their flight times.

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

The most popular airlines flying from London to Siem Reap are Singapore Airlines, Vietnam Airlines and Thai Airways.

Singapore Airlines
Singapore Airlines
From £190
Vietnam Airlines
Vietnam Airlines
From £625
Thai Airways
Thai Airways
From £833
British Airways
British Airways
From £781

What are the cheapest airlines that fly to Siem Reap?

The cheapest airlines flying from London to Siem Reap are Austrian Airlines, Vietnam Airlines and Singapore Airlines.

Rainfall in Siem Reap by month

Plan your trip to Siem Reap by taking into account the average rainfall totals by month.

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.

Temperature in Siem Reap by month

Plan your trip to Siem Reap by taking into account the average temperature totals by month.

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).

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 2 July 2026.
Get a feel of what it's like to fly with Singapore Airlines,Thai Airways, andVietnam Airlines to Cambodia by reading reviews from past customers. 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
1,557 reviews
Check prices

Comfort

8.0

Boarding

8.3

Crew

8.6

Overall

8.2

Food

7.8

Entertainment

8.1

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2026

SAI - SIN

The only issue we had was seat selection. Was not easy to change, after they assigned seats. Also, the premium economy seats, are nothing special.. All and all safe flight with minor back issues.
Singapore Airlines
8.2
Very Good
1,557 reviews
Singapore Airlines
8.2
Very Good
1,557 reviews
Check prices

Comfort

8.0

Boarding

8.3

Crew

8.6

Overall

8.2

Food

7.8

Entertainment

8.1

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2026

SAI - SIN

The only issue we had was seat selection. Was not easy to change, after they assigned seats. Also, the premium economy seats, are nothing special.. All and all safe flight with minor back issues.
Thai Airways
7.9
Good
408 reviews
Singapore Airlines
8.2
Very Good
1,557 reviews
Check prices

Comfort

8.0

Boarding

8.3

Crew

8.6

Overall

8.2

Food

7.8

Entertainment

8.1

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2026

SAI - SIN

The only issue we had was seat selection. Was not easy to change, after they assigned seats. Also, the premium economy seats, are nothing special.. All and all safe flight with minor back issues.
Vietnam Airlines
7.7
Good
275 reviews
Singapore Airlines
8.2
Very Good
1,557 reviews
Check prices

Comfort

8.0

Boarding

8.3

Crew

8.6

Overall

8.2

Food

7.8

Entertainment

8.1

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2026

SAI - SIN

The only issue we had was seat selection. Was not easy to change, after they assigned seats. Also, the premium economy seats, are nothing special.. All and all safe flight with minor back issues.
British Airways
6.7
Okay
8,087 reviews
Singapore Airlines
8.2
Very Good
1,557 reviews
Check prices

Comfort

8.0

Boarding

8.3

Crew

8.6

Overall

8.2

Food

7.8

Entertainment

8.1

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2026

SAI - SIN

The only issue we had was seat selection. Was not easy to change, after they assigned seats. Also, the premium economy seats, are nothing special.. All and all safe flight with minor back issues.

FAQs about flying to Siem Reap

  • What airport do you fly into for flights to Siem Reap?

    Travelers will need to book flights to Siem Reap–Angkor Intl (SAI) if they wish to fly to Siem Reap. The Siem Reap airport is 24.7 mi from the city center.

  • Can I find cheaper flights to Siem Reap if I am willing to have stopovers?

    Yes, flights with stopovers are often cheaper than direct flights. Keep an eye out for flight deals to Siem Reap on Cheapflights that require 1 or 2 stops for potential cost savings.

  • What is the best airline to fly to Siem Reap?

    Based on reviews from Cheapflights users, Austrian Airlines is rated the highest out of the airlines that fly to Siem Reap.

  • What is the cheapest airport to fly to in Siem Reap?

    Siem Reap–Angkor Intl is currently the cheapest airport to fly to in Siem Reap. One-way flights to Siem Reap–Angkor Intl typically cost £50, while return flights cost around £120.

  • How much is a return flight to Siem Reap?

    A return flight to Siem Reap will typically cost around £121, however they can be found for as little as £120.

  • Where does the fastest flight to Siem Reap depart from?

    For those looking to save time traveling to Siem Reap, London offers the quickest one-way flight (13 hours 55 minutes).

  • Does Siem Reap–Angkor Intl have car hire?

    Yes. Those touching down at Siem Reap–Angkor Intl can take advantage of the car hire services offered upon their arrival.

  • Are there hotels close to Siem Reap–Angkor Intl?

    Yes. Siem Reap–Angkor Intl has hotels nearby for those requiring accommodations. Beng Mealea Lodge is the closest property to Siem Reap–Angkor Intl (6.0 mi away from Siem Reap–Angkor Intl).

See more FAQs

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Millions of users choose and trust Cheapflights to book the best flight deals to Siem Reap for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

Cheapflights does show flights with no change fees to all users. To see these options for flights to Siem Reap, users can toggle the no change fees filter when performing a flight search.

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