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Cheap flights from the United Kingdom to Phnom Penh from £772

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 19/8. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PNH
3 Jul — 10 Jul1
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.

One-way flights from United Kingdom to Phnom Penh
Search for one-way flight options from United Kingdom to Phnom Penh. Find affordable one-way fares based on user searches. Data last updated 3 June 2026.

Wed 19/821:30
LHR
-
PNH
1 stop30h 30m
British Airways
Deal found 31/5£772
Thu 15/1022:00
LHR
-
PNH
2 stops30h 00m
British Airways
Deal found 2/6£798
Tue 14/721:30
LHR
-
PNH
1 stop30h 30m
British Airways
Deal found 1/6£927

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 3 June 2026.

Popular in

July

Cheapest in

November

Average price

£604
Highest demand for flights based on searches. 14% potential increase in price (£85 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£18 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 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 3 June 2026.
Use the filters below to find and compare flights from the United Kingdom to Phnom Penh that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest one-way

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Wed 19/8

21:30-10:00

1 stop30h 30m

£772
Fastest single journey

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Thu 15/10

22:00-10:00

2 stops30h 00m

£798

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Tue 14/7

21:30-10:00

1 stop30h 30m

£927

Flights are sorted by cheapest return flights first.

Deals found on 31/5

Sorted by cheapest first

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 £307). Flying from United Kingdom to Phnom Penh in July is currently the most expensive (average of £552). 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.

How far ahead should I book a flight from United Kingdom to Phnom Penh?

The price you pay for your flight from United Kingdom to Phnom Penh may vary depending on when you book. For the best chance of a lower fare, look to book 77 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 3 June 2026.
Check out reviews from past customers who have flown with Singapore Airlines,Thai Airways, andChina Southern 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
8.2
Very Good
1,528 reviews
Check prices

Overall

8.2

Comfort

8.0

Entertainment

8.1

Boarding

8.3

Food

7.8

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.
Singapore Airlines
8.2
Very Good
1,528 reviews
Singapore Airlines
8.2
Very Good
1,528 reviews
Check prices

Overall

8.2

Comfort

8.0

Entertainment

8.1

Boarding

8.3

Food

7.8

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.
Thai Airways
7.9
Good
404 reviews
Singapore Airlines
8.2
Very Good
1,528 reviews
Check prices

Overall

8.2

Comfort

8.0

Entertainment

8.1

Boarding

8.3

Food

7.8

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.
China Southern
7.5
Good
153 reviews
Singapore Airlines
8.2
Very Good
1,528 reviews
Check prices

Overall

8.2

Comfort

8.0

Entertainment

8.1

Boarding

8.3

Food

7.8

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.
Etihad Airways
7.3
Good
1,444 reviews
Singapore Airlines
8.2
Very Good
1,528 reviews
Check prices

Overall

8.2

Comfort

8.0

Entertainment

8.1

Boarding

8.3

Food

7.8

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.
Air China
7.3
Good
154 reviews
Singapore Airlines
8.2
Very Good
1,528 reviews
Check prices

Overall

8.2

Comfort

8.0

Entertainment

8.1

Boarding

8.3

Food

7.8

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.

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.

  • 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 £288 on China Southern. Other airlines that offer cheap prices include Etihad Airways from £311 and Air China from £353 one-way.

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

    While some choose either London City - Phnom Penh Pochentong or London Heathrow - 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 £307). Flying from United Kingdom to Phnom Penh in July is currently the most expensive (average of £552). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 3 June 2026.
AirlineCheapestAverageFlexibilityOn-time
China SouthernCheapest£362Average£476FlexibilityNo cancel feeOn-time69%
Search China Southern flights
Air ChinaCheapest£384Average£514FlexibilityNo cancel feeOn-time67%
Search Air China flights
Shenzhen AirlinesCheapest£437Average£497FlexibilityNo cancel feeOn-time63%
Search Shenzhen Airlines flights
Etihad AirwaysCheapest£512Average£650FlexibilityNo cancel feeOn-time75%
Search Etihad Airways flights
Singapore AirlinesCheapest£561Average£738FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights
Malaysia AirlinesCheapest£597Average£648FlexibilityNo cancel feeOn-time67%
Search Malaysia Airlines flights
EmiratesCheapest£698Average£900FlexibilityNo cancel feeOn-time75%
Search Emirates flights
British AirwaysCheapest£709Average£836FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Qatar AirwaysCheapest£710Average£807FlexibilityNo cancel feeOn-time68%
Search Qatar Airways flights
Cathay PacificCheapest£766Average£883FlexibilityNo cancel feeOn-time72%
Search Cathay Pacific 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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