Cheap flights from London Heathrow Airport to Phnom Penh from £318
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 31/8. Fares are subject to change and may not be available on all flights or dates of travel.
Cheapflights Tip: The best prices from London Heathrow to Phnom Penh Pochentong are usually found in November or March, booked 63 days in advance, depart on a Monday or Saturday and return on a Wednesday
Cheap flight deals from Heathrow to Phnom Penh
Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Phnom Penh (PNH). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 11 July 2025.
Round-trip from | £551 |
---|---|
One-way from | £318 |
Popular in | August |
Cheapest in | November |
Average price | £923 |
Find flight deals from Heathrow to Phnom Penh
Cheapest flights from Heathrow to Phnom PenhExplore the most affordable flight options available from Heathrow to Phnom Penh. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 July 2025.
Explore the most affordable flight options available from Heathrow to Phnom Penh. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 July 2025.
Cheapflights Fare Finder
Customise your flight search to find flights from Heathrow 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 11 July 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Phnom Penh that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
LondonPhnom Penh
LHR - PNH
LHRPNH
London Heathrow
Sat 4/10
22:10-14:30
1 stop34h 20m
Phnom Penh Pochentong
Sun 30/11
08:00-18:15
1 stop17h 15m
LondonPhnom Penh
LHR - PNH
LHRPNH
London Heathrow
Sat 30/8
22:05-11:10
1 stop31h 05m
Phnom Penh Pochentong
Tue 30/9
12:15-20:00
1 stop37h 45m
LondonPhnom Penh
LHR - PNH
LHRPNH
London Heathrow
Sat 4/10
22:40-23:05
1 stop18h 25m
Phnom Penh Pochentong
Mon 3/11
00:25-15:55
1 stop22h 30m
LondonPhnom Penh
LHR - PNH
LHRPNH
London Heathrow
Mon 6/10
20:50-17:25
2 stops38h 35m
Phnom Penh Pochentong
Sat 18/10
08:30-07:00
1 stop28h 30m
LondonPhnom Penh
LHR - PNH
LHRPNH
London Heathrow
Tue 2/9
11:00-17:25
1 stop24h 25m
Phnom Penh Pochentong
Wed 1/10
18:20-16:35
1 stop28h 15m
LondonPhnom Penh
LHR - PNH
LHRPNH
London Heathrow
Tue 2/9
09:05-16:35
2 stops25h 30m
Phnom Penh Pochentong
Wed 1/10
20:50-20:15
2 stops29h 25m
LondonPhnom Penh
LHR - PNH
LHRPNH
London Heathrow
Sun 31/8
22:05-11:10
1 stop31h 05m
LondonPhnom Penh
LHR - PNH
LHRPNH
London Heathrow
Sun 31/8
19:05-08:55
3 stops55h 50m
LondonPhnom Penh
LHR - PNH
LHRPNH
London Heathrow
Tue 23/9
22:10-14:30
1 stop34h 20m
LondonPhnom Penh
LHR - PNH
LHRPNH
London Heathrow
Sun 31/8
21:20-11:35
2 stops32h 15m
Best time to book a flight from Heathrow to Phnom Penh
Have a flexible travel schedule? Discover the best time to fly to Phnom Penh from Heathrow with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from London Heathrow Airport to Phnom Penh
How far ahead should I book a flight from London Heathrow Airport to Phnom Penh?
Use this chart to determine the optimal time to book a return flight from Heathrow to Phnom Penh. Price data was last updated on 27 June 2025.
The best time to book flights from London Heathrow Airport to Phnom Penh is 63 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from London Heathrow Airport to Phnom Penh?
Currently, September is the cheapest month in which you can book a flight from London Heathrow Airport to Phnom Penh (average of £689). Flying from London Heathrow Airport 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 LHR to PNH?
Find hourly flight availability from Heathrow 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 11 July 2025.
When flying from London Heathrow Airport to Phnom Penh, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 39% versus a flight at midday.
What is the cheapest day to fly from London Heathrow Airport to Phnom Penh?
Use this chart to determine the cheapest time to fly return from Heathrow to Phnom Penh. Price data was last updated on 16 December 2024.
Travellers seeking maximum savings on their London Heathrow Airport to Phnom Penh flight should consider departing on Monday evenings when fares are most often at their lowest. Friday at midday flights should be avoided if possible as fares are typically the most expensive at this time.
How much does it cost for a return flight from London Heathrow Airport to Phnom Penh?
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 11 July 2025.
Read through reviews of airlines operating flights from London Heathrow Airport to Phnom Penh, such as Emirates, China Southern, andQatar Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Crew
Food
Comfort
Boarding
Entertainment
Overall
Reviews
Hemshika,Jun 2025
DXB - LGW
Crew
Food
Comfort
Boarding
Entertainment
Overall
Reviews
Hemshika,Jun 2025
DXB - LGW
Crew
Food
Comfort
Boarding
Entertainment
Overall
Reviews
Hemshika,Jun 2025
DXB - LGW
Crew
Food
Comfort
Boarding
Entertainment
Overall
Reviews
Hemshika,Jun 2025
DXB - LGW
Crew
Food
Comfort
Boarding
Entertainment
Overall
Reviews
Hemshika,Jun 2025
DXB - LGW
Crew
Food
Comfort
Boarding
Entertainment
Overall
Reviews
Hemshika,Jun 2025
DXB - LGW
Related info for your journey
Find useful and relevant information for your journey from Heathrow to Phnom Penh. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
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Alternative routes for Heathrow to Phnom Penh
See prices for flight routes from nearby airports that may be better suited for you.
Top 10 airlines flying from Heathrow to Phnom Penh
Discover the top 10 airlines that operate flights from Heathrow 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 11 July 2025.
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 Heathrow to Phnom Penh?
Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Heathrow 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 Heathrow to Phnom Penh?
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 Phnom Penh from Heathrow.
Can Cheapflights find flights from Heathrow to Phnom Penh with no change fees?
Yes! Cheapflights helps users easily find flights from Heathrow to Phnom Penh with no change fees.
Can Cheapflights notify me if prices for flights from Heathrow to Phnom Penh become cheaper?
Not ready to book yet? You can track prices for flights from Heathrow to Phnom Penh on Cheapflights with our Price Alert feature and get notified when better prices are available.