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Cheap flights from the United Kingdom to Phnom Penh from £12,954

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 19/7. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PNH
20 Feb — 27 Feb1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from United Kingdom to Phnom Penh

Enter your travel dates to find the best prices.

Cheapest flights from United Kingdom to Phnom Penh
Explore the most affordable flight options available from United Kingdom to Phnom Penh. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 January 2026.

Sun 19/721:30
LHR
-
PNH
1 stop30h 30m
British Airways
Sat 1/818:20
PNH
-
LHR
1 stop17h 05m
British Airways
Deal found 19/1£12,954

Find flight deals from United Kingdom to Phnom Penh

Keep the following information in mind while searching for United Kingdom to Phnom Penh flight deals. Data was last updated 21 January 2026.

Round-trip from

£12,954

Popular in

July

Cheapest in

November

Average price

£596
British Airways
  • British Airways
  • 19/7-1/8
  • 2 total stops
  • 47h 35m total
  • United Kingdom to Phnom Penh
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£82 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£15 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from United Kingdom to Phnom Penh that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 21 January 2026.
Use the filters below to find and compare flights from the United Kingdom to Phnom Penh that are best for you.

Fly from

United Kingdom

Fly to

Phnom Penh

Route

Depart

Return

Price

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Sun 19/7

21:30-10:00

1 stop30h 30m

Phnom Penh Pochentong

Sat 1/8

18:20-05:25

1 stop17h 05m

£12,954

Flights are sorted by cheapest return flights first.

Deals found on 19/1

Best time to book a flight from United Kingdom to Phnom Penh

Have a flexible travel schedule? Discover the best time to fly to Phnom Penh from United Kingdom 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 from the United Kingdom to Phnom Penh

What is the cheapest month to book a flight from United Kingdom to Phnom Penh?

Currently, September is the cheapest month in which you can book a flight from United Kingdom to Phnom Penh (average of £362). Flying from United Kingdom to Phnom Penh in July is currently the most expensive (average of £683). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How often are flights from the United Kingdom to Phnom Penh delayed?

About 0% of weekly flights between United Kingdom and Phnom Penh have experienced delays in the past year, with the average delay time being 0 minutes.

What is the most punctual flight time for the United Kingdom to Phnom Penh flights?

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Thursday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.

Reviews of airlines servicing Phnom Penh

Get insights into the airlines that provide service to Phnom Penh. 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 Phnom Penh. Reviews last updated 21 January 2026.
Check out reviews from past customers who have flown with Singapore Airlines, Thai Airways, andEtihad Airways from the United Kingdom to Phnom Penh to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Singapore Airlines
8.1
Very Good
1,434 reviews
Check prices

Crew

8.6

Overall

8.1

Boarding

8.3

Comfort

8.0

Entertainment

8.0

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
8.1
Very Good
1,434 reviews
Singapore Airlines
8.1
Very Good
1,434 reviews
Check prices

Crew

8.6

Overall

8.1

Boarding

8.3

Comfort

8.0

Entertainment

8.0

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
379 reviews
Singapore Airlines
8.1
Very Good
1,434 reviews
Check prices

Crew

8.6

Overall

8.1

Boarding

8.3

Comfort

8.0

Entertainment

8.0

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.
Etihad Airways
7.3
Good
1,374 reviews
Singapore Airlines
8.1
Very Good
1,434 reviews
Check prices

Crew

8.6

Overall

8.1

Boarding

8.3

Comfort

8.0

Entertainment

8.0

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.
China Southern
7.3
Good
133 reviews
Singapore Airlines
8.1
Very Good
1,434 reviews
Check prices

Crew

8.6

Overall

8.1

Boarding

8.3

Comfort

8.0

Entertainment

8.0

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.
Air China
7.2
Good
138 reviews
Singapore Airlines
8.1
Very Good
1,434 reviews
Check prices

Crew

8.6

Overall

8.1

Boarding

8.3

Comfort

8.0

Entertainment

8.0

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.

Related info for your journey

Find useful and relevant information for your journey from United Kingdom to Phnom Penh. 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 Phnom Penh from United Kingdom?

    For a flight from United Kingdom to Phnom Penh, you will be flying into Pochentong. Phnom Penh Pochentong (PNH) is just 5.0 mi from the center of the city.

  • How long is the flight from United Kingdom to Phnom Penh?

    Airlines like British Airways fly from United Kingdom to Phnom Penh in about 30h 30m. The time it takes to get you to your destination can typically vary by up to . The distance from United Kingdom to Phnom Penh is about 6232 mi.

  • What are the cheapest airlines to fly from United Kingdom to Phnom Penh one-way?

    One-way options have recently been found by users for as low as £191 on Shenzhen Airlines. Other airlines that offer cheap prices include China Southern from £288 and Singapore Airlines from £309 one-way.

  • What are the most popular routes from United Kingdom to Phnom Penh?

    While some choose either London City - Phnom Penh Pochentong or Manchester - Phnom Penh Pochentong, London Gatwick - Phnom Penh Pochentong is the most popular route from United Kingdom to Phnom Penh.

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

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

  • How can I find direct flights from United Kingdom to Phnom Penh?

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

  • Can I find deals for business class flights from United Kingdom to Phnom Penh?

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

  • What is the cheapest month to book a flight from United Kingdom to Phnom Penh?

    Currently, September is the cheapest month in which you can book a flight from United Kingdom to Phnom Penh (average of £362). Flying from United Kingdom to Phnom Penh in July is currently the most expensive (average of £683). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for United Kingdom to Phnom Penh

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Siem Reap flights
Gatwick to Siem Reap flights
London City to Siem Reap flights
Stansted to Siem Reap flights
Gatwick to Phnom Penh flights
London City to Phnom Penh flights
Manchester to Siem Reap flights
Manchester to Phnom Penh flights
Heathrow to Krong Preah Sihanouk flights
Gatwick to Krong Preah Sihanouk flights
Frankfurt to Phnom Penh flights
Manchester to Krong Preah Sihanouk flights
Stansted to Phnom Penh flights
Luton to Phnom Penh flights
Birmingham to Phnom Penh flights
Bruxelles-National to Phnom Penh flights
Luton to Siem Reap flights
Edinburgh to Phnom Penh flights
Edinburgh to Siem Reap flights
Heathrow to Phnom Penh flights
Birmingham to Siem Reap flights
Newcastle upon Tyne to Phnom Penh flights
Norwich to Phnom Penh flights
Prague to Phnom Penh flights
Southampton to Phnom Penh flights
Glasgow Intl to Siem Reap flights
Leeds to Phnom Penh flights

Top 10 airlines flying from United Kingdom to Phnom Penh

Discover the top 10 airlines that operate flights from United Kingdom to Phnom Penh. 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 21 January 2026.
AirlineCheapestAverageFlexibilityOn-time
China SouthernCheapest£362Average£575FlexibilityNo cancel feeOn-time69%
Search China Southern flights
Air ChinaCheapest£387Average£490FlexibilityNo cancel feeOn-time67%
Search Air China flights
Shenzhen AirlinesCheapest£416Average£479FlexibilityNo cancel feeOn-time63%
Search Shenzhen Airlines flights
Qatar AirwaysCheapest£463Average£786FlexibilityNo cancel feeOn-time68%
Search Qatar Airways flights
British AirwaysCheapest£498Average£781FlexibilityNo cancel feeOn-time70%
Search British Airways flights
China EasternCheapest£512Average£618FlexibilityNo cancel feeOn-time62%
Search China Eastern flights
Etihad AirwaysCheapest£514Average£655FlexibilityNo cancel feeOn-time75%
Search Etihad Airways flights
Singapore AirlinesCheapest£565Average£709FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights
Malaysia AirlinesCheapest£592Average£689FlexibilityNo cancel feeOn-time67%
Search Malaysia Airlines flights
Vietnam AirlinesCheapest£633Average£713FlexibilityNo cancel feeOn-time81%
Search Vietnam Airlines 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 Phnom Penh?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from United Kingdom to Phnom Penh. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from United Kingdom to Phnom Penh?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from United Kingdom to Phnom Penh.

Can Cheapflights find flights from United Kingdom to Phnom Penh with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from United Kingdom to Phnom Penh, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from United Kingdom to Phnom Penh become cheaper?

Not ready to book yet? You can track prices for flights from United Kingdom to Phnom Penh on Cheapflights with our Price Alert feature and get notified when better prices are available.

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