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£278+ 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
8 Mar — 15 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 6 February 2026.

Tue 8/919:30
LHR
-
SAI
2 stops17h 15m
Austrian Airlines
Tue 22/919:25
SAI
-
LHR
2 stops18h 55m
Austrian Airlines
Deal found 4/2£539
Wed 18/310:30
LGW
-
SAI
3 stops27h 30m
China Eastern
Mon 30/321:10
SAI
-
LGW
2 stops63h 30m
China Eastern
Deal found 3/2£548
Mon 18/512:35
LGW
-
SAI
2 stops23h 30m
Multiple Airlines
Sun 24/519:05
SAI
-
LGW
2 stops41h 30m
Multiple Airlines
Deal found 4/2£556
Thu 18/606:00
LHR
-
SAI
2 stops30h 45m
Multiple Airlines
Thu 25/610:30
SAI
-
LHR
2 stops37h 20m
Multiple Airlines
Deal found 4/2£560
Mon 18/517:50
LHR
-
SAI
2 stops18h 55m
Lufthansa
Sun 24/516:00
SAI
-
LHR
2 stops22h 40m
Lufthansa
Deal found 4/2£573
Thu 18/618:40
LHR
-
SAI
2 stops33h 00m
SWISS
Thu 25/610:30
SAI
-
LHR
2 stops30h 50m
SWISS
Deal found 5/2£588
Tue 8/909:15
LCY
-
SAI
2 stops27h 30m
SWISS
Tue 22/910:30
SAI
-
LCY
2 stops28h 10m
SWISS
Deal found 4/2£590
Mon 2/310:30
LGW
-
SAI
3 stops27h 30m
China Eastern
Sat 28/322:00
SAI
-
LGW
2 stops62h 40m
China Eastern
Deal found 4/2£600
Mon 2/321:00
LHR
-
SAI
3 stops65h 00m
China Eastern
Tue 10/322:00
SAI
-
LHR
2 stops26h 30m
China Eastern
Deal found 5/2£614
Mon 2/321:00
LHR
-
SAI
3 stops65h 00m
China Eastern
Mon 30/321:10
SAI
-
LHR
3 stops51h 30m
China Eastern
Deal found 4/2£630
Tue 8/916:25
LHR
-
SAI
3 stops20h 20m
Multiple Airlines
Tue 22/919:25
SAI
-
LHR
2 stops29h 15m
Multiple Airlines
Deal found 4/2£636
Mon 18/521:20
LHR
-
SAI
3 stops40h 50m
Multiple Airlines
Sun 24/517:10
SAI
-
LHR
2 stops31h 30m
Multiple Airlines
Deal found 4/2£640

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 6 February 2026.

Return from

£548

One-way from

£278

Popular in

December

Cheapest in

September

Average price

£805
China Eastern
  • China Eastern
  • 18/3-30/3
  • 4 total stops
  • 91h 00m total
  • London to Siem Reap
Search Deals
28/2
  • 28/2
  • 3 total stops
  • 49h 15m total
  • London to Siem Reap
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£66 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 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 6 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

LGW - SAI

LGWSAI

London Gatwick

Wed 18/3

10:30-21:00

2 stops27h 30m

Siem Reap–Angkor Intl

Mon 30/3

21:10-06:40

2 stops63h 30m

£548

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Mon 2/3

10:30-21:00

3 stops27h 30m

Siem Reap–Angkor Intl

Tue 10/3

22:00-14:00

2 stops47h 00m

£600

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Tue 3/3

10:30-21:00

2 stops51h 30m

Siem Reap–Angkor Intl

Mon 30/3

21:10-06:40

2 stops39h 30m

£600

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Wed 4/3

10:30-21:00

3 stops27h 30m

Siem Reap–Angkor Intl

Mon 30/3

21:10-06:40

2 stops39h 30m

£600

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Mon 2/3

10:30-21:00

2 stops27h 30m

Siem Reap–Angkor Intl

Mon 30/3

21:10-06:40

2 stops39h 30m

£600

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Thu 5/3

10:30-21:00

2 stops51h 30m

Siem Reap–Angkor Intl

Wed 1/4

21:10-15:10

3 stops48h 00m

£600

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Tue 3/3

10:30-21:00

2 stops51h 30m

Siem Reap–Angkor Intl

Sat 28/3

22:00-14:10

3 stops47h 10m

£600

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Mon 2/3

21:00-21:00

3 stops65h 00m

Siem Reap–Angkor Intl

Mon 30/3

21:10-18:40

3 stops51h 30m

£630

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Wed 4/3

21:00-21:00

3 stops65h 00m

Siem Reap–Angkor Intl

Mon 30/3

21:10-18:40

3 stops51h 30m

£630

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Mon 2/3

21:00-21:00

3 stops65h 00m

Siem Reap–Angkor Intl

Wed 1/4

21:10-18:40

2 stops27h 30m

£630

Flights are sorted by cheapest return flights first.

Deals found on 4/2

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 0 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 £643
Vietnam Airlines
Vietnam Airlines
From £610
Thai Airways
Thai Airways
From £849
Emirates
Emirates
From £886

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 6 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
1,451 reviews
Check prices

Comfort

8.0

Boarding

8.3

Crew

8.6

Entertainment

8.0

Overall

8.2

Food

7.8

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
1,451 reviews
Singapore Airlines
8.2
Very Good
1,451 reviews
Check prices

Comfort

8.0

Boarding

8.3

Crew

8.6

Entertainment

8.0

Overall

8.2

Food

7.8

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
1,451 reviews
Check prices

Comfort

8.0

Boarding

8.3

Crew

8.6

Entertainment

8.0

Overall

8.2

Food

7.8

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
224 reviews
Singapore Airlines
8.2
Very Good
1,451 reviews
Check prices

Comfort

8.0

Boarding

8.3

Crew

8.6

Entertainment

8.0

Overall

8.2

Food

7.8

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
7,716 reviews
Singapore Airlines
8.2
Very Good
1,451 reviews
Check prices

Comfort

8.0

Boarding

8.3

Crew

8.6

Entertainment

8.0

Overall

8.2

Food

7.8

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 £112.

  • How much is a return flight to Siem Reap?

    A return flight to Siem Reap will typically cost around £114, however they can be found for as little as £112.

  • 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 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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