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£351+ 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 18/5. Fares are subject to change and may not be available on all flights or dates of travel.
— SAI
29 Apr — 6 May1
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 30 March 2026.

Sat 5/1217:00
LGW
-
SAI
2 stops37h 15m
Multiple Airlines
Tue 15/1222:00
SAI
-
LGW
2 stops39h 30m
Multiple Airlines
Deal found 25/3£558
Wed 2/1210:30
LGW
-
SAI
3 stops27h 30m
China Eastern
Sat 12/1222:00
SAI
-
LGW
3 stops47h 00m
China Eastern
Deal found 25/3£572
Wed 20/516:15
LHR
-
SAI
2 stops20h 30m
Multiple Airlines
Wed 27/519:30
SAI
-
LHR
2 stops42h 00m
Multiple Airlines
Deal found 26/3£577
Mon 18/516:15
LHR
-
SAI
2 stops20h 30m
Multiple Airlines
Sun 24/509:45
SAI
-
LHR
2 stops27h 45m
Multiple Airlines
Deal found 27/3£582
Fri 4/1210:30
LGW
-
SAI
3 stops27h 30m
China Eastern
Thu 17/1222:00
SAI
-
LGW
2 stops39h 30m
China Eastern
Deal found 25/3£623
Tue 10/1121:00
LHR
-
SAI
3 stops41h 00m
China Eastern
Sat 5/1222:00
SAI
-
LHR
3 stops50h 30m
China Eastern
Deal found 30/3£627
Tue 12/509:30
LHR
-
SAI
2 stops23h 20m
Multiple Airlines
Sun 17/510:00
SAI
-
LHR
2 stops27h 00m
Multiple Airlines
Deal found 30/3£665
Tue 10/1110:30
LGW
-
SAI
2 stops51h 30m
China Eastern
Thu 3/1222:00
SAI
-
LGW
2 stops47h 00m
China Eastern
Deal found 30/3£671
Thu 3/1210:30
LGW
-
SAI
2 stops51h 30m
China Eastern
Thu 17/1222:00
SAI
-
LGW
2 stops39h 30m
China Eastern
Deal found 25/3£673
Mon 2/1110:30
LGW
-
SAI
2 stops39h 40m
Multiple Airlines
Sat 28/1122:00
SAI
-
LGW
2 stops39h 30m
Multiple Airlines
Deal found 27/3£685
Sat 5/1220:05
LHR
-
SAI
2 stops54h 45m
SWISS
Tue 15/1209:55
SAI
-
LHR
2 stops18h 45m
SWISS
Deal found 25/3£690
Sun 15/1121:00
LHR
-
SAI
2 stops41h 00m
China Eastern
Thu 26/1122:00
SAI
-
LHR
2 stops50h 30m
China Eastern
Deal found 29/3£700

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 30 March 2026.

Return from

£577

One-way from

£351

Popular in

December

Cheapest in

September

Average price

£855
20/5-27/5
  • 20/5-27/5
  • 4 total stops
  • 62h 30m total
  • London to Siem Reap
Search Deals
18/5
  • 18/5
  • 3 total stops
  • 27h 10m total
  • London to Siem Reap
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (£61 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 March 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 30 March 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

LTN - SAI

LTNSAI

London Luton

Thu 30/4

15:15-09:05

3 stops35h 50m

Siem Reap–Angkor Intl

Mon 25/5

13:05-14:35

3 stops31h 30m

£722

LondonSiem Reap

STN - SAI

STNSAI

London Stansted

Tue 21/4

21:05-21:30

2 stops42h 25m

Siem Reap–Angkor Intl

Wed 13/5

13:05-12:55

2 stops29h 50m

£735

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Mon 27/4

14:35-21:30

2 stops24h 55m

Siem Reap–Angkor Intl

Mon 18/5

13:05-12:35

2 stops29h 30m

£757

LondonSiem Reap

STN - SAI

STNSAI

London Stansted

Mon 27/4

21:05-21:30

2 stops18h 25m

Siem Reap–Angkor Intl

Mon 18/5

13:05-12:55

2 stops29h 50m

£783

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Tue 26/5

23:55-21:30

2 stops39h 35m

Siem Reap–Angkor Intl

Sun 7/6

13:05-07:20

2 stops24h 15m

£787

LondonSiem Reap

STN - SAI

STNSAI

London Stansted

Tue 28/4

21:05-21:30

2 stops42h 25m

Siem Reap–Angkor Intl

Tue 19/5

23:50-12:55

2 stops43h 05m

£789

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Thu 30/4

09:00-16:10

2 stops25h 10m

Siem Reap–Angkor Intl

Mon 25/5

11:55-13:25

2 stops55h 30m

£792

LondonSiem Reap

STN - SAI

STNSAI

London Stansted

Fri 15/5

21:05-21:30

2 stops18h 25m

Siem Reap–Angkor Intl

Mon 1/6

13:05-18:45

2 stops35h 40m

£798

LondonSiem Reap

STN - SAI

STNSAI

London Stansted

Sat 2/5

21:05-12:20

2 stops33h 15m

Siem Reap–Angkor Intl

Mon 11/5

13:05-12:55

2 stops29h 50m

£798

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Fri 1/5

16:50-21:30

2 stops22h 40m

Siem Reap–Angkor Intl

Wed 27/5

13:05-18:40

2 stops35h 35m

£802

Flights are sorted by cheapest return flights first.

Deals found on 26/3

Showing 1-10 of 60 resultsSorted by cheapest first
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2
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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 20 hours 15 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 £672
Vietnam Airlines
Vietnam Airlines
From £625
Emirates
Emirates
From £759
Thai Airways
Thai Airways
From £870

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 30 March 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
1,484 reviews
Check prices

Food

7.8

Boarding

8.3

Crew

8.6

Comfort

8.0

Overall

8.2

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
1,484 reviews
Singapore Airlines
8.2
Very Good
1,484 reviews
Check prices

Food

7.8

Boarding

8.3

Crew

8.6

Comfort

8.0

Overall

8.2

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
3,550 reviews
Singapore Airlines
8.2
Very Good
1,484 reviews
Check prices

Food

7.8

Boarding

8.3

Crew

8.6

Comfort

8.0

Overall

8.2

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
7.8
Good
395 reviews
Singapore Airlines
8.2
Very Good
1,484 reviews
Check prices

Food

7.8

Boarding

8.3

Crew

8.6

Comfort

8.0

Overall

8.2

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
250 reviews
Singapore Airlines
8.2
Very Good
1,484 reviews
Check prices

Food

7.8

Boarding

8.3

Crew

8.6

Comfort

8.0

Overall

8.2

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
7,834 reviews
Singapore Airlines
8.2
Very Good
1,484 reviews
Check prices

Food

7.8

Boarding

8.3

Crew

8.6

Comfort

8.0

Overall

8.2

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 £41, while return flights cost around £176.

  • How much is a return flight to Siem Reap?

    A return flight to Siem Reap will typically cost around £182, however they can be found for as little as £176.

  • 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 (16 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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Flights to Siem Reap

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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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