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Cheap flights from the United Kingdom to Siem Reap, Cambodia

LHR — SAI
24 Aug — 31 Aug1
1 adult

Cheap flight deals from United Kingdom to Siem Reap

Keep the following information in mind while searching for United Kingdom to Siem Reap flight deals. Data was last updated 19 August 2025.

Popular in

December

Cheapest in

September

Average price

£767
Highest demand for flights based on searches. 4% potential increase in price (£30 potential increase over avg. return price).
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Cheapest flight prices on average. 4% potential price decrease (£24 potential savings vs. average return price).
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Average for round-trip flights in August 2025
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Cheapflights Insights

Everything you need to know about your flight from the United Kingdom to Siem Reap

What is the cheapest time of day to fly from GB to SAI?

Find hourly flight availability from United Kingdom to Siem Reap. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 19 August 2025.

When flying from United Kingdom to Siem Reap, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 19 August 2025.
Read through reviews of airlines operating flights from the United Kingdom to Siem Reap, such as Emirates, Singapore Airlines, andThai Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Emirates
8.1
Very Good
3,314 reviews
Check prices

Comfort

8.0

Entertainment

8.2

Food

7.9

Overall

8.1

Boarding

8.1

Crew

8.3

Reviews

1 / 20
10.0
Excellent

Steven,Feb 2025

GLA - DXB

Although I was in economy it made no difference where the staff were concerned they were attentive and pleasant throughout the flight maybe one day I'll get the chance to see if there's a difference in business or 1st class service but in truth for the way I was treated I can only see the menu being an upgrade as the staff don't need upgrading and are indeed the biggest asset on a long journey a credit to the company.
Emirates
8.1
Very Good
3,314 reviews
Emirates
8.1
Very Good
3,314 reviews
Check prices

Comfort

8.0

Entertainment

8.2

Food

7.9

Overall

8.1

Boarding

8.1

Crew

8.3

Reviews

1 / 20
10.0
Excellent

Steven,Feb 2025

GLA - DXB

Although I was in economy it made no difference where the staff were concerned they were attentive and pleasant throughout the flight maybe one day I'll get the chance to see if there's a difference in business or 1st class service but in truth for the way I was treated I can only see the menu being an upgrade as the staff don't need upgrading and are indeed the biggest asset on a long journey a credit to the company.
Singapore Airlines
8.1
Very Good
1,347 reviews
Emirates
8.1
Very Good
3,314 reviews
Check prices

Comfort

8.0

Entertainment

8.2

Food

7.9

Overall

8.1

Boarding

8.1

Crew

8.3

Reviews

1 / 20
10.0
Excellent

Steven,Feb 2025

GLA - DXB

Although I was in economy it made no difference where the staff were concerned they were attentive and pleasant throughout the flight maybe one day I'll get the chance to see if there's a difference in business or 1st class service but in truth for the way I was treated I can only see the menu being an upgrade as the staff don't need upgrading and are indeed the biggest asset on a long journey a credit to the company.
Thai Airways
7.8
Good
344 reviews
Emirates
8.1
Very Good
3,314 reviews
Check prices

Comfort

8.0

Entertainment

8.2

Food

7.9

Overall

8.1

Boarding

8.1

Crew

8.3

Reviews

1 / 20
10.0
Excellent

Steven,Feb 2025

GLA - DXB

Although I was in economy it made no difference where the staff were concerned they were attentive and pleasant throughout the flight maybe one day I'll get the chance to see if there's a difference in business or 1st class service but in truth for the way I was treated I can only see the menu being an upgrade as the staff don't need upgrading and are indeed the biggest asset on a long journey a credit to the company.
Vietnam Airlines
7.5
Good
198 reviews
Emirates
8.1
Very Good
3,314 reviews
Check prices

Comfort

8.0

Entertainment

8.2

Food

7.9

Overall

8.1

Boarding

8.1

Crew

8.3

Reviews

1 / 20
10.0
Excellent

Steven,Feb 2025

GLA - DXB

Although I was in economy it made no difference where the staff were concerned they were attentive and pleasant throughout the flight maybe one day I'll get the chance to see if there's a difference in business or 1st class service but in truth for the way I was treated I can only see the menu being an upgrade as the staff don't need upgrading and are indeed the biggest asset on a long journey a credit to the company.
British Airways
6.7
Okay
7,283 reviews
Emirates
8.1
Very Good
3,314 reviews
Check prices

Comfort

8.0

Entertainment

8.2

Food

7.9

Overall

8.1

Boarding

8.1

Crew

8.3

Reviews

1 / 20
10.0
Excellent

Steven,Feb 2025

GLA - DXB

Although I was in economy it made no difference where the staff were concerned they were attentive and pleasant throughout the flight maybe one day I'll get the chance to see if there's a difference in business or 1st class service but in truth for the way I was treated I can only see the menu being an upgrade as the staff don't need upgrading and are indeed the biggest asset on a long journey a credit to the company.

Related info for your journey

Find useful and relevant information for your journey from United Kingdom to Siem Reap. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Siem Reap from United Kingdom?

    Siem Reap–Angkor Intl (SAI) is the airport you will fly into if you book a flight from United Kingdom to Siem Reap. It is only a 24.7 mi journey from Siem Reap–Angkor Intl (SAI) to Siem Reap’s city center.

  • Can I find deals for flights from United Kingdom to Siem Reap that include hotel bookings?

    Yes. In addition to deals on United Kingdom to Siem Reap flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from United Kingdom to Siem Reap?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from United Kingdom to Siem Reap.

  • Can I find deals for business class flights from United Kingdom to Siem Reap?

    Yes. Cheapflights offers flight deals from United Kingdom to Siem Reap by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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Top 5 airlines flying from United Kingdom to Siem Reap

Discover the top 5 airlines that operate flights from United Kingdom to Siem Reap. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 19 August 2025.
AirlineCheapestAverageFlexibilityOn-time
Vietnam AirlinesCheapest£627Average£724FlexibilityNo cancel feeOn-time81%
Search Vietnam Airlines flights
Singapore AirlinesCheapest£636Average£751FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights
LufthansaCheapest£727Average£762FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Thai AirwaysCheapest£808Average£940FlexibilityNo cancel feeOn-time77%
Search Thai Airways flights
EmiratesCheapest£896Average£966FlexibilityNo cancel feeOn-time75%
Search Emirates flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from United Kingdom to Siem Reap?

Cheapflights helps you search for flights from United Kingdom to Siem Reap via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from United Kingdom to Siem Reap?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Siem Reap from United Kingdom.

Can Cheapflights find flights from United Kingdom to Siem Reap with no change fees?

Yes! Cheapflights helps users easily find flights from United Kingdom to Siem Reap with no change fees.

Can Cheapflights notify me if prices for flights from United Kingdom to Siem Reap become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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