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£276+ 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 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
— SAI
1 Sep — 8 Sep1
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 2 August 2026.

Thu 19/1106:00
LHR
-
SAI
2 stops29h 45m
Austrian Airlines
Thu 3/1209:55
SAI
-
LHR
2 stops18h 45m
Austrian Airlines
Deal found 1/8£575
Fri 27/1110:30
LGW
-
SAI
3 stops27h 30m
China Eastern
Sat 12/1222:00
SAI
-
LGW
3 stops39h 30m
China Eastern
Deal found 29/7£588
Wed 28/1010:30
LGW
-
SAI
2 stops26h 10m
Multiple Airlines
Tue 10/1122:00
SAI
-
LGW
2 stops39h 30m
Multiple Airlines
Deal found 30/7£591
Thu 3/1206:00
LHR
-
SAI
2 stops29h 45m
Multiple Airlines
Mon 14/1209:55
SAI
-
LHR
2 stops18h 45m
Multiple Airlines
Deal found 31/7£600
Tue 1/911:35
LGW
-
SAI
2 stops24h 30m
Multiple Airlines
Fri 11/919:05
SAI
-
LGW
2 stops54h 10m
Multiple Airlines
Deal found 1/8£611
Wed 28/1009:05
LHR
-
SAI
2 stops26h 40m
Austrian Airlines
Tue 10/1119:25
SAI
-
LHR
2 stops19h 55m
Austrian Airlines
Deal found 30/7£612
Wed 2/909:25
LGW
-
SAI
2 stops27h 30m
SWISS
Thu 1/1009:40
SAI
-
LGW
2 stops28h 45m
SWISS
Deal found 1/8£612
Wed 2/913:50
LHR
-
SAI
2 stops23h 05m
SWISS
Thu 1/1009:40
SAI
-
LHR
2 stops18h 05m
SWISS
Deal found 1/8£612
Fri 25/906:00
LHR
-
SAI
2 stops30h 55m
Multiple Airlines
Tue 29/909:40
SAI
-
LHR
2 stops28h 15m
Multiple Airlines
Deal found 1/8£613
Mon 9/1110:30
LGW
-
SAI
3 stops27h 30m
China Eastern
Tue 24/1122:00
SAI
-
LGW
3 stops39h 30m
China Eastern
Deal found 29/7£614
Mon 31/818:00
LGW
-
SAI
2 stops44h 10m
China Eastern
Fri 2/1021:10
SAI
-
LGW
2 stops52h 05m
China Eastern
Deal found 1/8£619
Wed 2/912:10
LHR
-
SAI
2 stops24h 45m
SWISS
Wed 23/909:40
SAI
-
LHR
2 stops36h 45m
SWISS
Deal found 29/7£624

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 August 2026.

Return from

£575

One-way from

£276

Popular in

December

Cheapest in

July

Average price

£925
Austrian Airlines
  • Austrian Airlines
  • 19/11-3/12
  • 4 total stops
  • 48h 30m total
  • London to Siem Reap
Search Deals
1/9
  • 1/9
  • 3 total stops
  • 44h 55m total
  • London to Siem Reap
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£99 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£36 potential savings vs. average return price).
Search Deals
Average for return flights in August 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 August 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

LHR - SAI

LHRSAI

London Heathrow

Wed 18/11

13:45-18:45

2 stops22h 00m

Siem Reap–Angkor Intl

Fri 4/12

09:55-21:40

2 stops18h 45m

£639

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Fri 20/11

10:30-21:00

3 stops27h 30m

Siem Reap–Angkor Intl

Sat 5/12

22:00-14:00

3 stops47h 00m

£669

LondonSiem Reap

LTN - SAI

LTNSAI

London Luton

Mon 31/8

05:40-18:05

3 stops30h 25m

Siem Reap–Angkor Intl

Thu 10/9

17:55-00:50

3 stops36h 55m

£669

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Fri 20/11

10:30-21:00

3 stops27h 30m

Siem Reap–Angkor Intl

Tue 1/12

22:00-06:30

2 stops39h 30m

£669

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Thu 19/11

10:30-21:00

2 stops51h 30m

Siem Reap–Angkor Intl

Tue 1/12

22:00-06:30

2 stops39h 30m

£669

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Fri 20/11

19:25-18:45

2 stops16h 20m

Siem Reap–Angkor Intl

Wed 2/12

09:55-21:40

2 stops18h 45m

£675

LondonSiem Reap

LCY - SAI

LCYSAI

London City

Thu 19/11

09:15-18:45

2 stops26h 30m

Siem Reap–Angkor Intl

Thu 3/12

09:55-08:40

2 stops29h 45m

£686

LondonSiem Reap

LCY - SAI

LCYSAI

London City

Mon 23/11

09:15-18:45

2 stops26h 30m

Siem Reap–Angkor Intl

Mon 7/12

09:55-08:40

2 stops29h 45m

£689

LondonSiem Reap

LCY - SAI

LCYSAI

London City

Tue 10/11

09:15-18:45

2 stops26h 30m

Siem Reap–Angkor Intl

Mon 23/11

09:55-08:40

2 stops29h 45m

£698

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Wed 2/9

18:00-20:10

2 stops44h 10m

Siem Reap–Angkor Intl

Wed 30/9

21:10-15:00

3 stops47h 50m

£718

Flights are sorted by cheapest return flights first.

Deals found on 28/7

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 17 hours 53 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 £186
Vietnam Airlines
Vietnam Airlines
From £614
Thai Airways
Thai Airways
From £886
British Airways
British Airways
From £758

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 August 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
1,584 reviews
Check prices

Comfort

8.0

Boarding

8.3

Crew

8.6

Food

7.8

Entertainment

8.1

Overall

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered
Singapore Airlines
8.2
Very Good
1,584 reviews
Singapore Airlines
8.2
Very Good
1,584 reviews
Check prices

Comfort

8.0

Boarding

8.3

Crew

8.6

Food

7.8

Entertainment

8.1

Overall

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered
Thai Airways
7.9
Good
412 reviews
Singapore Airlines
8.2
Very Good
1,584 reviews
Check prices

Comfort

8.0

Boarding

8.3

Crew

8.6

Food

7.8

Entertainment

8.1

Overall

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered
Vietnam Airlines
7.7
Good
282 reviews
Singapore Airlines
8.2
Very Good
1,584 reviews
Check prices

Comfort

8.0

Boarding

8.3

Crew

8.6

Food

7.8

Entertainment

8.1

Overall

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered
British Airways
6.7
Okay
8,136 reviews
Singapore Airlines
8.2
Very Good
1,584 reviews
Check prices

Comfort

8.0

Boarding

8.3

Crew

8.6

Food

7.8

Entertainment

8.1

Overall

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered

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 £46, while return flights cost around £63.

  • How much is a return flight to Siem Reap?

    A return flight to Siem Reap will typically cost around £79, however they can be found for as little as £63.

  • 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 (15 hours 30 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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