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£295+ 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 16/3. Fares are subject to change and may not be available on all flights or dates of travel.
— SAI
27 Mar — 3 Apr1
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 25 February 2026.

Mon 1/618:40
LHR
-
SAI
2 stops33h 00m
SWISS
Mon 15/610:30
SAI
-
LHR
2 stops27h 25m
SWISS
Deal found 23/2£552
Mon 1/609:25
LGW
-
SAI
2 stops27h 20m
SWISS
Mon 15/610:30
SAI
-
LGW
2 stops27h 50m
SWISS
Deal found 23/2£552
Sun 29/1117:00
LGW
-
SAI
2 stops45h 00m
China Eastern
Sat 12/1222:00
SAI
-
LGW
3 stops39h 30m
China Eastern
Deal found 22/2£563
Thu 3/1210:30
LGW
-
SAI
2 stops51h 30m
China Eastern
Thu 17/1222:00
SAI
-
LGW
3 stops39h 30m
China Eastern
Deal found 22/2£564
Thu 19/1110:30
LGW
-
SAI
2 stops51h 30m
China Eastern
Sat 5/1222:00
SAI
-
LGW
3 stops39h 30m
China Eastern
Deal found 24/2£565
Mon 16/1118:40
LHR
-
SAI
2 stops32h 10m
SWISS
Mon 7/1209:55
SAI
-
LHR
2 stops18h 45m
SWISS
Deal found 24/2£585
Sun 29/1121:00
LHR
-
SAI
2 stops41h 00m
China Eastern
Tue 15/1222:00
SAI
-
LHR
2 stops50h 30m
China Eastern
Deal found 22/2£591
Tue 1/1221:00
LHR
-
SAI
2 stops41h 00m
China Eastern
Tue 15/1222:00
SAI
-
LHR
3 stops50h 30m
China Eastern
Deal found 22/2£592
Thu 5/321:25
LHR
-
SAI
1 stop29h 35m
Multiple Airlines
Thu 19/322:00
SAI
-
LHR
2 stops26h 30m
Multiple Airlines
Deal found 21/2£593
Wed 2/1210:30
LGW
-
SAI
3 stops27h 30m
China Eastern
Sat 12/1222:00
SAI
-
LGW
2 stops39h 30m
China Eastern
Deal found 22/2£613
Fri 13/1110:30
LGW
-
SAI
3 stops27h 30m
China Eastern
Sat 5/1222:00
SAI
-
LGW
2 stops39h 30m
China Eastern
Deal found 24/2£615
Mon 1/606:00
LHR
-
SAI
2 stops30h 45m
Multiple Airlines
Mon 15/621:10
SAI
-
LHR
3 stops51h 30m
Multiple Airlines
Deal found 23/2£620

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 25 February 2026.

Return from

£552

One-way from

£295

Popular in

December

Cheapest in

September

Average price

£814
SWISS
  • SWISS
  • 1/6-15/6
  • 4 total stops
  • 60h 25m total
  • London to Siem Reap
Search Deals
16/3
  • 16/3
  • 3 total stops
  • 43h 30m total
  • London to Siem Reap
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (£62 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£31 potential savings vs. average return price).
Search Deals
Average for return flights in February 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 25 February 2026.
Use the filters below to find and compare flights to Siem Reap that are best for you.

Fly from

Route

Depart

Return

Price

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Sun 5/4

20:50-10:50

2 stops32h 00m

Siem Reap–Angkor Intl

Sun 3/5

13:00-07:00

2 stops48h 00m

£737

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Wed 8/4

13:35-21:30

3 stops25h 55m

Siem Reap–Angkor Intl

Sun 19/4

19:10-22:05

3 stops32h 55m

£750

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Mon 23/3

06:30-16:05

3 stops26h 35m

Siem Reap–Angkor Intl

Sat 4/4

15:35-20:00

2 stops34h 25m

£786

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Mon 23/3

06:00-16:05

3 stops27h 05m

Siem Reap–Angkor Intl

Sat 4/4

23:50-18:35

2 stops24h 45m

£796

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Sun 15/3

17:00-18:05

2 stops42h 05m

Siem Reap–Angkor Intl

Sun 29/3

19:30-18:30

1 stop29h 00m

£805

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Wed 8/4

21:20-21:05

2 stops41h 45m

Siem Reap–Angkor Intl

Sun 19/4

09:45-07:05

2 stops27h 20m

£928

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Sun 5/4

10:15-09:40

1 stop17h 25m

Siem Reap–Angkor Intl

Sun 3/5

10:30-06:55

1 stop26h 25m

£938

LondonSiem Reap

STN - SAI

STNSAI

London Stansted

Sun 15/3

14:05-09:15

2 stops36h 10m

Siem Reap–Angkor Intl

Sun 29/3

19:30-12:55

2 stops23h 25m

£982

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Mon 10/8

10:15-09:40

1 stop17h 25m

Siem Reap–Angkor Intl

Mon 24/8

10:30-06:55

1 stop26h 25m

£991

LondonSiem Reap

STN - SAI

STNSAI

London Stansted

Fri 10/4

14:55-21:30

2 stops24h 35m

Siem Reap–Angkor Intl

Fri 17/4

15:35-15:25

3 stops29h 50m

£997

Flights are sorted by cheapest return flights first.

Deals found on 24/2

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 32 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 £648
Vietnam Airlines
Vietnam Airlines
From £614
Thai Airways
Thai Airways
From £662
Emirates
Emirates
From £892

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 25 February 2026.
Read through reviews of airlines serving Cambodia, such as Singapore Airlines, Thai Airways, andVietnam 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
1,463 reviews
Check prices

Boarding

8.3

Food

7.8

Overall

8.2

Comfort

8.0

Entertainment

8.0

Crew

8.6

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
1,463 reviews
Singapore Airlines
8.2
Very Good
1,463 reviews
Check prices

Boarding

8.3

Food

7.8

Overall

8.2

Comfort

8.0

Entertainment

8.0

Crew

8.6

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
7.8
Good
386 reviews
Singapore Airlines
8.2
Very Good
1,463 reviews
Check prices

Boarding

8.3

Food

7.8

Overall

8.2

Comfort

8.0

Entertainment

8.0

Crew

8.6

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
235 reviews
Singapore Airlines
8.2
Very Good
1,463 reviews
Check prices

Boarding

8.3

Food

7.8

Overall

8.2

Comfort

8.0

Entertainment

8.0

Crew

8.6

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
7,768 reviews
Singapore Airlines
8.2
Very Good
1,463 reviews
Check prices

Boarding

8.3

Food

7.8

Overall

8.2

Comfort

8.0

Entertainment

8.0

Crew

8.6

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 £38, while return flights cost around £136.

  • How much is a return flight to Siem Reap?

    A return flight to Siem Reap will typically cost around £160, however they can be found for as little as £136.

  • 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 (14 hours 20 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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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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