Cheap flights from the United Kingdom to Phnom Penh from £503

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 13/11. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PNH
18 Oct — 25 Oct1
1 adult
1 adult, Economy

Cheap 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 18 September 2025.

Round-trip from

£524

One-way from

£503

Popular in

July

Cheapest in

November

Average price

£569
Etihad Airways
  • Etihad Airways
  • 23/2-10/3
  • 2 total stops
  • 32h 30m total
  • United Kingdom to Phnom Penh
13/11
  • 13/11
  • 3 total stops
  • 47h 00m total
  • United Kingdom to Phnom Penh
Highest demand for flights based on searches. 13% potential increase in price (£74 potential increase over avg. return price).
Cheapest flight prices on average. 3% potential price decrease (£15 potential savings vs. average return price).
Average for round-trip flights in September 2025

Find flight deals from United Kingdom to Phnom Penh

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 18 September 2025.

Mon 24/1108:50LHR - PNH
1 stop14h 40mEtihad Airways
Mon 8/1207:55PNH - LHR
1 stop37h 35mEtihad Airways
Deal found 16/9£536
Thu 11/1208:50LHR - PNH
1 stop14h 40mEtihad Airways
Fri 19/1207:55PNH - LHR
1 stop17h 15mEtihad Airways
Deal found 16/9£561
Wed 24/1219:20LHR - PNH
1 stop28h 10mEtihad Airways
Tue 20/119:50PNH - LHR
1 stop25h 40mEtihad Airways
Deal found 16/9£593
Sat 6/1220:55LHR - PNH
1 stop26h 35mEtihad Airways
Sat 20/1219:50PNH - LHR
1 stop23h 15mEtihad Airways
Deal found 16/9£646
Sat 27/1220:55LHR - PNH
1 stop26h 35mEtihad Airways
Tue 13/107:55PNH - LHR
1 stop29h 45mEtihad Airways
Deal found 16/9£673
Mon 10/1108:25MAN - PNH
1 stop27h 00mEtihad Airways
Mon 24/1107:55PNH - MAN
1 stop35h 20mEtihad Airways
Deal found 16/9£761
Sun 7/1212:55MAN - PNH
2 stops34h 35mMultiple Airlines
Sat 20/1219:50PNH - MAN
2 stops33h 10mMultiple Airlines
Deal found 16/9£763
Fri 5/1216:20LHR - PNH
2 stops19h 05mMultiple Airlines
Fri 19/1207:55PNH - LHR
1 stop17h 15mMultiple Airlines
Deal found 16/9£770
Mon 24/1119:20LHR - PNH
1 stop16h 05mMultiple Airlines
Mon 8/1207:55PNH - LHR
2 stops34h 30mMultiple Airlines
Deal found 16/9£779
Fri 31/1008:25MAN - PNH
1 stop27h 00mEtihad Airways
Fri 7/1107:55PNH - MAN
1 stop35h 20mEtihad Airways
Deal found 16/9£789
Mon 24/1119:55MAN - PNH
1 stop15h 30mMultiple Airlines
Mon 8/1207:55PNH - MAN
2 stops36h 30mMultiple Airlines
Deal found 17/9£799
Mon 3/1108:50LHR - PNH
1 stop26h 35mEtihad Airways
Mon 24/1107:55PNH - LHR
1 stop17h 15mEtihad Airways
Deal found 16/9£818

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 18 September 2025.
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

Mon 23/2

08:50-06:30

1 stop14h 40m

Phnom Penh Pochentong

Tue 10/3

19:50-06:40

1 stop17h 50m

£524

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Mon 24/11

08:50-06:30

1 stop14h 40m

Phnom Penh Pochentong

Mon 8/12

07:55-14:30

1 stop37h 35m

£536

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Thu 11/12

08:50-06:30

1 stop14h 40m

Phnom Penh Pochentong

Fri 19/12

07:55-18:10

1 stop17h 15m

£561

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Sat 6/12

20:55-06:30

1 stop26h 35m

Phnom Penh Pochentong

Sat 20/12

19:50-12:05

1 stop23h 15m

£646

ManchesterPhnom Penh

MAN - PNH

MANPNH

Manchester

Mon 10/11

08:25-18:25

1 stop27h 00m

Phnom Penh Pochentong

Mon 24/11

07:55-12:15

1 stop35h 20m

£761

ManchesterPhnom Penh

MAN - PNH

MANPNH

Manchester

Sun 7/12

12:55-06:30

2 stops34h 35m

Phnom Penh Pochentong

Sat 20/12

19:50-22:00

2 stops33h 10m

£763

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Fri 5/12

16:20-18:25

2 stops19h 05m

Phnom Penh Pochentong

Fri 19/12

07:55-18:10

1 stop17h 15m

£770

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Mon 24/11

19:20-18:25

1 stop16h 05m

Phnom Penh Pochentong

Mon 8/12

07:55-11:25

2 stops34h 30m

£779

ManchesterPhnom Penh

MAN - PNH

MANPNH

Manchester

Fri 31/10

08:25-18:25

1 stop27h 00m

Phnom Penh Pochentong

Fri 7/11

07:55-12:15

1 stop35h 20m

£789

ManchesterPhnom Penh

MAN - PNH

MANPNH

Manchester

Mon 24/11

19:55-18:25

1 stop15h 30m

Phnom Penh Pochentong

Mon 8/12

07:55-13:25

2 stops36h 30m

£799

Flights are sorted by cheapest return flights first.

Deals found on 15/9

Showing 1-10 of 32 results
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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 £689). Flying from United Kingdom to Phnom Penh in July is currently the most expensive (average of £1,232). 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.

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

Find hourly flight availability from United Kingdom to Phnom Penh. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 18 September 2025.

When flying from United Kingdom to Phnom Penh, 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 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 18 September 2025.
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.

Comfort

8.0

Boarding

8.2

Food

7.7

Crew

8.6

Entertainment

8.0

Overall

8.1

Reviews

1 / 20
6.0
Good

Pierre,Apr 2025

MLE - SIN

3 boarding pass checkpoints at the gate. Long line before boarding. Poor leg room in economy.. Flight crew rounds practically non existent during flight.

Comfort

8.0

Boarding

8.2

Food

7.7

Crew

8.6

Entertainment

8.0

Overall

8.1

Reviews

1 / 20
6.0
Good

Pierre,Apr 2025

MLE - SIN

3 boarding pass checkpoints at the gate. Long line before boarding. Poor leg room in economy.. Flight crew rounds practically non existent during flight.

Comfort

8.0

Boarding

8.2

Food

7.7

Crew

8.6

Entertainment

8.0

Overall

8.1

Reviews

1 / 20
6.0
Good

Pierre,Apr 2025

MLE - SIN

3 boarding pass checkpoints at the gate. Long line before boarding. Poor leg room in economy.. Flight crew rounds practically non existent during flight.

Comfort

8.0

Boarding

8.2

Food

7.7

Crew

8.6

Entertainment

8.0

Overall

8.1

Reviews

1 / 20
6.0
Good

Pierre,Apr 2025

MLE - SIN

3 boarding pass checkpoints at the gate. Long line before boarding. Poor leg room in economy.. Flight crew rounds practically non existent during flight.

Comfort

8.0

Boarding

8.2

Food

7.7

Crew

8.6

Entertainment

8.0

Overall

8.1

Reviews

1 / 20
6.0
Good

Pierre,Apr 2025

MLE - SIN

3 boarding pass checkpoints at the gate. Long line before boarding. Poor leg room in economy.. Flight crew rounds practically non existent during flight.

Comfort

8.0

Boarding

8.2

Food

7.7

Crew

8.6

Entertainment

8.0

Overall

8.1

Reviews

1 / 20
6.0
Good

Pierre,Apr 2025

MLE - SIN

3 boarding pass checkpoints at the gate. Long line before boarding. Poor leg room in economy.. Flight crew rounds practically non existent during flight.

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 Etihad Airways fly from United Kingdom to Phnom Penh in about 14h 40m. 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 most popular routes 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 £689). Flying from United Kingdom to Phnom Penh in July is currently the most expensive (average of £1,232). 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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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 18 September 2025.
AirlineCheapestAverageFlexibilityOn-time
China SouthernCheapest£357Average£555FlexibilityNo cancel feeOn-time69%
Search China Southern flights
Shenzhen AirlinesCheapest£376Average£441FlexibilityNo cancel feeOn-time63%
Search Shenzhen Airlines flights
Air ChinaCheapest£400Average£495FlexibilityNo cancel feeOn-time67%
Search Air China flights
China EasternCheapest£504Average£583FlexibilityNo cancel feeOn-time62%
Search China Eastern flights
Etihad AirwaysCheapest£510Average£655FlexibilityNo cancel feeOn-time75%
Search Etihad Airways flights
Singapore AirlinesCheapest£556Average£705FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights
Malaysia AirlinesCheapest£587Average£692FlexibilityNo cancel feeOn-time67%
Search Malaysia Airlines flights
British AirwaysCheapest£606Average£780FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Qatar AirwaysCheapest£631Average£780FlexibilityNo cancel feeOn-time68%
Search Qatar Airways flights
EmiratesCheapest£643Average£830FlexibilityNo cancel feeOn-time75%
Search Emirates flights

Fly with Cheapflights

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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?

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