Cheap flights from Phnom Penh (PNH) to Heathrow (LHR)
PNH — LHR
Nov 29 — Dec 61
1 adult, Economy
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1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Phnom Penh Pochentong to London Heathrow are usually found in August or March, booked 73 days in advance, depart on a Sunday or Saturday and return on a Friday
Cheap flight deals from Phnom Penh to Heathrow
Discover tips and strategies to find the most affordable flight options for your journey from Phnom Penh (PNH) to Heathrow (LHR). 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 October 30, 2025.
Most accurate provider | Gotogate 3 stars |
|---|---|
Most trusted provider | Gotogate 3 stars |
Popular in | February |
Cheapest in | August |
Average price | $1,104 |
Compare providers for flights from Phnom Penh to Heathrow
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Phnom Penh to Heathrow in October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Phnom Penh-London Heathrow Airport flights, users find the pricing of Gotogate to be most consistent on Cheapflights vs. Gotogate Users can find the same prices on Phnom Penh-London Heathrow Airport flight deals on Cheapflights vs. Gotogate >95% of the time. Price accuracy is based on data collected from Phnom Penh-London Heathrow Airport flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Phnom Penh-London Heathrow Airport flights, Cheapflights users trust Gotogate the most. Gotogate has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Phnom Penh-London Heathrow Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Phnom Penh to Heathrow
Have a flexible travel schedule? Discover the best time to fly to Heathrow from Phnom Penh with our price prediction graph.
Estimated round-trip 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 Phnom Penh to London Heathrow Airport
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How far ahead should I book a flight from Phnom Penh to London Heathrow Airport?
Use this chart to determine the optimal time to book a round-trip flight from Phnom Penh to Heathrow. Price data was last updated on October 24, 2025.
To ensure you get the cheapest price possible for a flight from Phnom Penh to London Heathrow Airport, you should look to book at least 73 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest month to book a flight from Phnom Penh to London Heathrow Airport?
Currently, November is the cheapest month in which you can book a flight from Phnom Penh to London Heathrow Airport (average of $655). Flying from Phnom Penh to London Heathrow Airport in April is currently the most expensive (average of $982). 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 PNH to LHR?
Find hourly flight availability from Phnom Penh to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 30, 2025.
It’s typically best to fly out from Phnom Penh to London Heathrow Airport at noon. Doing so could potentially save you 44% on the flight price compared to flying in the afternoon, which is usually more expensive.
What’s the top layover airport for flights from Phnom Penh to London Heathrow Airport?
Share of 1-stop round-trip flights from Phnom Penh to London Heathrow Airport chosen by Cheapflights users in the past 12 months, using the same layover each way.
Singapore (SIN) – chosen by Cheapflights users on 83% of 1-stop itineraries from Phnom Penh to London Heathrow Airport on Cheapflights.
What’s the fastest layover option from Phnom Penh to London Heathrow Airport?
Shortest average travel time for 1-stop one-way flights from Phnom Penh to London Heathrow Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Bangkok (BKK) have the shortest average one-way travel time for 1-stop routes: 15h 30m.
What’s the fastest layover option from Phnom Penh to London Heathrow Airport?
Shortest average travel time for 1-stop one-way flights from Phnom Penh to London Heathrow Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Bangkok (BKK) have the shortest average one-way travel time for 1-stop routes: 15h 30m.
Which airport typically offers the quickest layover for flights from Phnom Penh to London Heathrow Airport?
Average layover duration for 1-stop one-way flights from Phnom Penh to London Heathrow Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Bangkok (BKK) offer the fastest connection on this route, with an average layover time of 1h 43m.
Reviews of airlines servicing Heathrow
Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated October 30, 2025.
Read through reviews of airlines operating flights from Phnom Penh to London Heathrow Airport, such as Singapore Airlines, Thai Airways, and China Southern. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Overall
8.1
Boarding
8.3
Comfort
8.0
Crew
8.6
Food
7.7
Entertainment
8.0
Reviews
1 / 20
10.0
ExcellentJuliet,Oct 2025
PUS - SIN
Overall
8.1
Boarding
8.3
Comfort
8.0
Crew
8.6
Food
7.7
Entertainment
8.0
Reviews
1 / 20
10.0
ExcellentJuliet,Oct 2025
PUS - SIN
Overall
8.1
Boarding
8.3
Comfort
8.0
Crew
8.6
Food
7.7
Entertainment
8.0
Reviews
1 / 20
10.0
ExcellentJuliet,Oct 2025
PUS - SIN
Overall
8.1
Boarding
8.3
Comfort
8.0
Crew
8.6
Food
7.7
Entertainment
8.0
Reviews
1 / 20
10.0
ExcellentJuliet,Oct 2025
PUS - SIN
Overall
8.1
Boarding
8.3
Comfort
8.0
Crew
8.6
Food
7.7
Entertainment
8.0
Reviews
1 / 20
10.0
ExcellentJuliet,Oct 2025
PUS - SIN
Related info for your journey
Find useful and relevant information for your journey from Phnom Penh to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Top 4 airlines flying from Phnom Penh to Heathrow
Discover the top 4 airlines that operate flights from Phnom Penh to Heathrow. 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 2,558,603 searches. Data last updated October 30, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$663 | Average$751 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$705 | Average$838 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$921 | Average$1,273 | FlexibilityNo cancel fee | On-time81% | |
| Cheapest$1,103 | Average$1,300 | FlexibilityNo cancel fee | On-time77% |