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£273+ 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 28/2. Fares are subject to change and may not be available on all flights or dates of travel.
— SAI
15 Mar — 22 Mar1
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 13 February 2026.

Thu 12/311:05
LGW
-
SAI
2 stops24h 00m
Multiple Airlines
Thu 2/419:05
SAI
-
LGW
2 stops41h 55m
Multiple Airlines
Deal found 10/2£532
Wed 29/417:50
LHR
-
SAI
2 stops18h 55m
Lufthansa
Tue 26/510:30
SAI
-
LHR
2 stops28h 10m
Lufthansa
Deal found 10/2£561
Sun 6/906:00
LHR
-
SAI
2 stops30h 45m
Austrian Airlines
Wed 16/919:30
SAI
-
LHR
2 stops18h 50m
Austrian Airlines
Deal found 12/2£568
Thu 18/606:00
LHR
-
SAI
2 stops30h 45m
Multiple Airlines
Wed 15/716:00
SAI
-
LHR
2 stops21h 55m
Multiple Airlines
Deal found 10/2£574
Thu 12/321:00
LHR
-
SAI
3 stops41h 00m
China Eastern
Mon 30/321:10
SAI
-
LHR
3 stops51h 30m
China Eastern
Deal found 10/2£577
Wed 29/409:15
LGW
-
SAI
2 stops27h 30m
SWISS
Tue 26/510:30
SAI
-
LGW
2 stops27h 50m
SWISS
Deal found 10/2£593
Sun 15/317:00
LGW
-
SAI
2 stops45h 00m
China Eastern
Wed 1/421:10
SAI
-
LGW
2 stops48h 00m
China Eastern
Deal found 10/2£598
Tue 17/221:00
LHR
-
SAI
2 stops39h 05m
Multiple Airlines
Mon 2/321:40
SAI
-
LHR
2 stops26h 50m
Multiple Airlines
Deal found 11/2£609
Tue 10/321:00
LHR
-
SAI
2 stops41h 00m
China Eastern
Mon 30/321:10
SAI
-
LHR
2 stops27h 30m
China Eastern
Deal found 10/2£627
Thu 18/609:25
LGW
-
SAI
2 stops27h 20m
SWISS
Wed 15/716:00
SAI
-
LGW
2 stops22h 20m
SWISS
Deal found 10/2£632
Wed 29/409:15
LCY
-
SAI
2 stops27h 30m
SWISS
Tue 26/509:40
SAI
-
LCY
2 stops29h 00m
SWISS
Deal found 10/2£645
Fri 13/310:30
LGW
-
SAI
3 stops27h 30m
China Eastern
Wed 1/421:10
SAI
-
LGW
2 stops48h 00m
China Eastern
Deal found 10/2£648

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 13 February 2026.

Return from

£532

One-way from

£273

Popular in

December

Cheapest in

September

Average price

£806
12/3-2/4
  • 12/3-2/4
  • 4 total stops
  • 65h 55m total
  • London to Siem Reap
Search Deals
28/2
  • 28/2
  • 3 total stops
  • 45h 10m total
  • London to Siem Reap
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£72 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£33 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 13 February 2026.
Use the filters below to find and compare flights to Siem Reap that are best for you.

Fly from

London

Route

Depart

Return

Price

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Mon 9/3

21:00-21:00

3 stops65h 00m

Siem Reap–Angkor Intl

Mon 30/3

21:10-18:40

2 stops51h 30m

£577

LondonSiem Reap

LCY - SAI

LCYSAI

London City

Wed 29/4

09:15-18:45

2 stops27h 30m

Siem Reap–Angkor Intl

Tue 26/5

09:40-08:40

2 stops29h 00m

£645

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Fri 31/7

10:25-14:10

1 stop21h 45m

Siem Reap–Angkor Intl

Fri 14/8

14:55-07:25

1 stop22h 30m

£656

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Thu 12/3

21:00-21:00

2 stops41h 00m

Siem Reap–Angkor Intl

Fri 3/4

21:10-18:40

2 stops27h 30m

£677

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Sat 14/3

21:00-21:00

3 stops65h 00m

Siem Reap–Angkor Intl

Fri 3/4

21:10-18:40

2 stops27h 30m

£677

LondonSiem Reap

LCY - SAI

LCYSAI

London City

Thu 18/6

09:15-18:45

2 stops27h 30m

Siem Reap–Angkor Intl

Wed 15/7

16:00-08:40

2 stops22h 40m

£692

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Mon 2/3

10:25-15:00

1 stop21h 35m

Siem Reap–Angkor Intl

Wed 1/4

21:10-18:40

2 stops27h 30m

£712

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Tue 3/3

10:25-13:55

1 stop20h 30m

Siem Reap–Angkor Intl

Mon 30/3

21:10-18:40

2 stops27h 30m

£734

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Sun 1/3

10:25-15:00

1 stop21h 35m

Siem Reap–Angkor Intl

Mon 30/3

21:10-18:40

2 stops27h 30m

£734

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Wed 4/3

10:25-15:00

1 stop21h 35m

Siem Reap–Angkor Intl

Wed 1/4

21:10-18:40

2 stops27h 30m

£734

Flights are sorted by cheapest return flights first.

Deals found on 10/2

Showing 1-10 of 60 results
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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 19 hours 11 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 £642
Vietnam Airlines
Vietnam Airlines
From £608
Thai Airways
Thai Airways
From £655
Emirates
Emirates
From £883

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 13 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
1,452 reviews
Check prices

Food

7.8

Crew

8.6

Overall

8.2

Boarding

8.3

Comfort

8.0

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Wee Keng,Dec 2025

HKG - SIN

Quick 3 hour flight with excellent service from the crew despite it being Christmas Day holiday. Ground crew passed out Xmas cookies as well. Great experience.
Singapore Airlines
8.2
Very Good
1,452 reviews
Singapore Airlines
8.2
Very Good
1,452 reviews
Check prices

Food

7.8

Crew

8.6

Overall

8.2

Boarding

8.3

Comfort

8.0

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Wee Keng,Dec 2025

HKG - SIN

Quick 3 hour flight with excellent service from the crew despite it being Christmas Day holiday. Ground crew passed out Xmas cookies as well. Great experience.
Thai Airways
7.8
Good
382 reviews
Singapore Airlines
8.2
Very Good
1,452 reviews
Check prices

Food

7.8

Crew

8.6

Overall

8.2

Boarding

8.3

Comfort

8.0

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Wee Keng,Dec 2025

HKG - SIN

Quick 3 hour flight with excellent service from the crew despite it being Christmas Day holiday. Ground crew passed out Xmas cookies as well. Great experience.
Vietnam Airlines
7.6
Good
226 reviews
Singapore Airlines
8.2
Very Good
1,452 reviews
Check prices

Food

7.8

Crew

8.6

Overall

8.2

Boarding

8.3

Comfort

8.0

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Wee Keng,Dec 2025

HKG - SIN

Quick 3 hour flight with excellent service from the crew despite it being Christmas Day holiday. Ground crew passed out Xmas cookies as well. Great experience.
British Airways
6.7
Okay
7,736 reviews
Singapore Airlines
8.2
Very Good
1,452 reviews
Check prices

Food

7.8

Crew

8.6

Overall

8.2

Boarding

8.3

Comfort

8.0

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Wee Keng,Dec 2025

HKG - SIN

Quick 3 hour flight with excellent service from the crew despite it being Christmas Day holiday. Ground crew passed out Xmas cookies as well. Great experience.

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 £31, while return flights cost around £111.

  • How much is a return flight to Siem Reap?

    A return flight to Siem Reap will typically cost around £124, however they can be found for as little as £111.

  • 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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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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