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£283+ 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 17/3. Fares are subject to change and may not be available on all flights or dates of travel.
— SAI
7 Apr — 14 Apr1
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 8 March 2026.

Tue 8/913:50
LHR
-
SAI
2 stops22h 55m
SWISS
Wed 16/909:40
SAI
-
LHR
2 stops28h 15m
SWISS
Deal found 4/3£537
Wed 16/912:20
LHR
-
SAI
2 stops24h 25m
Multiple Airlines
Wed 30/909:40
SAI
-
LHR
2 stops18h 05m
Multiple Airlines
Deal found 5/3£541
Wed 2/913:50
LHR
-
SAI
2 stops22h 55m
SWISS
Wed 16/909:40
SAI
-
LHR
2 stops28h 15m
SWISS
Deal found 7/3£543
Sun 8/1109:00
LHR
-
SAI
2 stops41h 50m
SWISS
Wed 25/1109:55
SAI
-
LHR
2 stops18h 45m
SWISS
Deal found 3/3£553
Tue 8/909:25
LGW
-
SAI
2 stops27h 20m
SWISS
Wed 16/909:40
SAI
-
LGW
2 stops28h 45m
SWISS
Deal found 4/3£558
Mon 16/1118:40
LHR
-
SAI
2 stops32h 10m
SWISS
Mon 30/1116:45
SAI
-
LHR
2 stops22h 20m
SWISS
Deal found 4/3£558
Wed 2/909:20
LGW
-
SAI
2 stops27h 25m
SWISS
Wed 16/909:40
SAI
-
LGW
2 stops28h 45m
SWISS
Deal found 7/3£558
Wed 16/910:25
LGW
-
SAI
2 stops22h 25m
Multiple Airlines
Wed 14/1010:00
SAI
-
LGW
2 stops27h 30m
Multiple Airlines
Deal found 5/3£562
Wed 16/909:15
LCY
-
SAI
2 stops27h 30m
SWISS
Wed 30/909:40
SAI
-
LCY
2 stops29h 00m
SWISS
Deal found 5/3£562
Fri 6/1109:25
LGW
-
SAI
2 stops22h 35m
Multiple Airlines
Fri 20/1110:10
SAI
-
LGW
2 stops27h 15m
Multiple Airlines
Deal found 4/3£564
Wed 25/1118:40
LHR
-
SAI
2 stops32h 10m
SWISS
Wed 9/1209:55
SAI
-
LHR
2 stops18h 45m
SWISS
Deal found 4/3£566
Thu 19/1121:00
LHR
-
SAI
2 stops33h 15m
Multiple Airlines
Thu 3/1222:00
SAI
-
LHR
3 stops50h 30m
Multiple Airlines
Deal found 7/3£579

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 8 March 2026.

Return from

£543

One-way from

£283

Popular in

December

Cheapest in

September

Average price

£836
SWISS
  • SWISS
  • 2/9-16/9
  • 4 total stops
  • 51h 10m total
  • London to Siem Reap
Search Deals
17/3
  • 17/3
  • 3 total stops
  • 52h 30m total
  • London to Siem Reap
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£65 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 8 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

LGW - SAI

LGWSAI

London Gatwick

Wed 2/9

09:20-18:45

2 stops27h 25m

Siem Reap–Angkor Intl

Wed 16/9

09:40-08:25

2 stops28h 45m

£558

LondonSiem Reap

LCY - SAI

LCYSAI

London City

Wed 2/9

13:10-18:45

2 stops23h 35m

Siem Reap–Angkor Intl

Wed 16/9

09:40-08:40

2 stops29h 00m

£603

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Sat 16/5

16:15-18:45

2 stops20h 30m

Siem Reap–Angkor Intl

Sat 30/5

09:40-07:30

2 stops27h 50m

£662

LondonSiem Reap

STN - SAI

STNSAI

London Stansted

Wed 2/9

14:55-21:30

2 stops24h 35m

Siem Reap–Angkor Intl

Wed 16/9

12:55-12:55

2 stops30h 00m

£748

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Fri 28/8

14:35-21:30

2 stops24h 55m

Siem Reap–Angkor Intl

Wed 9/9

12:55-19:45

2 stops36h 50m

£775

LondonSiem Reap

STN - SAI

STNSAI

London Stansted

Thu 27/8

21:05-21:30

2 stops42h 25m

Siem Reap–Angkor Intl

Thu 10/9

23:50-18:45

2 stops24h 55m

£779

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Mon 20/4

18:55-17:10

1 stop16h 15m

Siem Reap–Angkor Intl

Mon 4/5

19:10-17:50

1 stop28h 40m

£780

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Fri 1/5

11:20-09:40

1 stop16h 20m

Siem Reap–Angkor Intl

Wed 27/5

16:00-15:45

1 stop29h 45m

£793

LondonSiem Reap

STN - SAI

STNSAI

London Stansted

Fri 28/8

14:55-21:30

2 stops24h 35m

Siem Reap–Angkor Intl

Thu 10/9

23:50-18:45

2 stops24h 55m

£799

LondonSiem Reap

STN - SAI

STNSAI

London Stansted

Thu 27/8

21:05-21:30

2 stops42h 25m

Siem Reap–Angkor Intl

Fri 11/9

12:55-18:45

2 stops35h 50m

£810

Flights are sorted by cheapest return flights first.

Deals found on 4/3

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 17 hours 55 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 £664
Vietnam Airlines
Vietnam Airlines
From £618
Thai Airways
Thai Airways
From £860
Emirates
Emirates
From £897

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 8 March 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
1,471 reviews
Check prices

Boarding

8.3

Crew

8.6

Entertainment

8.0

Overall

8.2

Comfort

8.0

Food

7.8

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
1,471 reviews
Singapore Airlines
8.2
Very Good
1,471 reviews
Check prices

Boarding

8.3

Crew

8.6

Entertainment

8.0

Overall

8.2

Comfort

8.0

Food

7.8

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
391 reviews
Singapore Airlines
8.2
Very Good
1,471 reviews
Check prices

Boarding

8.3

Crew

8.6

Entertainment

8.0

Overall

8.2

Comfort

8.0

Food

7.8

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
237 reviews
Singapore Airlines
8.2
Very Good
1,471 reviews
Check prices

Boarding

8.3

Crew

8.6

Entertainment

8.0

Overall

8.2

Comfort

8.0

Food

7.8

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
7,779 reviews
Singapore Airlines
8.2
Very Good
1,471 reviews
Check prices

Boarding

8.3

Crew

8.6

Entertainment

8.0

Overall

8.2

Comfort

8.0

Food

7.8

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 £47, while return flights cost around £137.

  • How much is a return flight to Siem Reap?

    A return flight to Siem Reap will typically cost around £161, however they can be found for as little as £137.

  • 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 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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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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