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£383+ Cheap flights to Siem Reap

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 20/5. Fares are subject to change and may not be available on all flights or dates of travel.
— SAI
3 Jun — 10 Jun1
1 adult
1 adult, Economy, 0 bags

Flights to Siem Reap 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 4 May 2026.

Wed 6/521:45
LHR
-
SAI
2 stops31h 30m
Etihad Airways
Sat 16/515:10
SAI
-
LHR
2 stops21h 50m
Etihad Airways
Deal found 29/4£560
Fri 8/521:45
LHR
-
SAI
2 stops29h 15m
Etihad Airways
Sun 12/719:20
SAI
-
LHR
2 stops29h 25m
Etihad Airways
Deal found 2/5£583
Fri 12/621:45
LHR
-
SAI
2 stops29h 15m
Etihad Airways
Thu 25/615:10
SAI
-
LHR
2 stops21h 50m
Etihad Airways
Deal found 1/5£584
Sun 10/509:30
LHR
-
SAI
2 stops22h 50m
Etihad Airways
Sat 16/515:10
SAI
-
LHR
2 stops21h 50m
Etihad Airways
Deal found 30/4£592
Thu 7/509:30
LHR
-
SAI
2 stops25h 25m
Etihad Airways
Thu 28/515:10
SAI
-
LHR
2 stops33h 35m
Etihad Airways
Deal found 1/5£593
Fri 12/621:45
LHR
-
SAI
2 stops29h 15m
Etihad Airways
Tue 23/615:10
SAI
-
LHR
2 stops27h 35m
Etihad Airways
Deal found 29/4£602
Tue 25/818:40
LHR
-
SAI
2 stops42h 15m
SWISS
Tue 22/909:40
SAI
-
LHR
2 stops36h 45m
SWISS
Deal found 3/5£607
Tue 25/809:25
LGW
-
SAI
2 stops27h 30m
SWISS
Tue 22/909:40
SAI
-
LGW
2 stops28h 45m
SWISS
Deal found 3/5£635
Fri 12/616:15
LHR
-
SAI
2 stops20h 40m
Multiple Airlines
Sat 27/609:40
SAI
-
LHR
2 stops27h 50m
Multiple Airlines
Deal found 29/4£668
Fri 10/721:45
LHR
-
SAI
2 stops29h 15m
Etihad Airways
Tue 21/715:10
SAI
-
LHR
2 stops21h 50m
Etihad Airways
Deal found 2/5£683
Sat 31/1017:00
LGW
-
SAI
2 stops43h 05m
Multiple Airlines
Sat 12/1222:00
SAI
-
LGW
3 stops39h 30m
Multiple Airlines
Deal found 28/4£690
Tue 25/809:15
LCY
-
SAI
2 stops27h 40m
SWISS
Tue 22/909:40
SAI
-
LCY
2 stops29h 00m
SWISS
Deal found 3/5£690

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 4 May 2026.

Return from

£584

One-way from

£383

Popular in

December

Cheapest in

September

Average price

£738
Etihad Airways
  • Etihad Airways
  • 12/6-25/6
  • 4 total stops
  • 51h 05m total
  • London to Siem Reap
Search Deals
20/5
  • 20/5
  • 3 total stops
  • 38h 30m total
  • London to Siem Reap
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£63 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£32 potential savings vs. average return price).
Search Deals
Average for return flights in May 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 4 May 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

LGW - SAI

LGWSAI

London Gatwick

Fri 12/6

09:25-18:55

2 stops27h 30m

Siem Reap–Angkor Intl

Thu 25/6

09:40-08:25

2 stops28h 45m

£712

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Fri 12/6

15:45-18:55

2 stops21h 10m

Siem Reap–Angkor Intl

Tue 23/6

12:55-09:00

2 stops26h 05m

£715

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Thu 29/10

20:25-21:10

2 stops41h 45m

Siem Reap–Angkor Intl

Thu 10/12

23:50-18:25

2 stops25h 35m

£764

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Fri 30/10

10:30-21:00

3 stops27h 30m

Siem Reap–Angkor Intl

Tue 15/12

22:00-06:30

2 stops39h 30m

£764

LondonSiem Reap

STN - SAI

STNSAI

London Stansted

Tue 25/8

21:05-21:30

2 stops42h 25m

Siem Reap–Angkor Intl

Tue 22/9

23:50-12:55

2 stops19h 05m

£766

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Thu 29/10

20:25-21:10

2 stops41h 45m

Siem Reap–Angkor Intl

Mon 14/12

13:20-06:40

2 stops24h 20m

£770

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Fri 12/6

21:45-09:00

2 stops29h 15m

Siem Reap–Angkor Intl

Thu 25/6

15:10-13:15

3 stops28h 05m

£776

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Fri 30/10

10:30-21:00

3 stops27h 30m

Siem Reap–Angkor Intl

Sat 12/12

22:00-06:30

2 stops39h 30m

£779

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Fri 21/8

09:25-18:55

2 stops27h 30m

Siem Reap–Angkor Intl

Sun 6/9

16:00-08:25

2 stops22h 25m

£781

LondonSiem Reap

STN - SAI

STNSAI

London Stansted

Fri 30/10

14:05-21:10

2 stops24h 05m

Siem Reap–Angkor Intl

Mon 14/12

13:20-12:05

2 stops29h 45m

£783

Flights are sorted by cheapest return flights first.

Deals found on 2/5

Showing 1-10 of 60 resultsSorted by cheapest first
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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

When is the best time to book a flight to Siem Reap?

The price you pay for your flight to Siem Reap may vary depending on when you book. For the best chance of a lower fare, look to book 53 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

How long is the flight to Siem Reap?

On average, a flight from London to Siem Reap takes 20 hours 29 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 £656
Vietnam Airlines
Vietnam Airlines
From £612
Emirates
Emirates
From £741
Thai Airways
Thai Airways
From £850

What are the cheapest airlines that fly to Siem Reap?

The cheapest airlines flying from London to Siem Reap are Austrian Airlines, Lufthansa and Vietnam 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 4 May 2026.
Read through reviews of airlines serving Cambodia, such as Singapore Airlines,Emirates, andThai Airways. 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
1,506 reviews
Check prices

Overall

8.2

Crew

8.6

Boarding

8.3

Food

7.8

Comfort

8.0

Entertainment

8.0

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
1,506 reviews
Singapore Airlines
8.2
Very Good
1,506 reviews
Check prices

Overall

8.2

Crew

8.6

Boarding

8.3

Food

7.8

Comfort

8.0

Entertainment

8.0

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.
Emirates
8.1
Very Good
3,568 reviews
Singapore Airlines
8.2
Very Good
1,506 reviews
Check prices

Overall

8.2

Crew

8.6

Boarding

8.3

Food

7.8

Comfort

8.0

Entertainment

8.0

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
401 reviews
Singapore Airlines
8.2
Very Good
1,506 reviews
Check prices

Overall

8.2

Crew

8.6

Boarding

8.3

Food

7.8

Comfort

8.0

Entertainment

8.0

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
264 reviews
Singapore Airlines
8.2
Very Good
1,506 reviews
Check prices

Overall

8.2

Crew

8.6

Boarding

8.3

Food

7.8

Comfort

8.0

Entertainment

8.0

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
7,943 reviews
Singapore Airlines
8.2
Very Good
1,506 reviews
Check prices

Overall

8.2

Crew

8.6

Boarding

8.3

Food

7.8

Comfort

8.0

Entertainment

8.0

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

  • 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 £40, while return flights cost around £122.

  • How much is a return flight to Siem Reap?

    A return flight to Siem Reap will typically cost around £241, however they can be found for as little as £122.

  • 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 (18 hours 25 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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Flights to Siem Reap

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