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Heathrow

Cheap flights from Phnom Penh (PNH) to Heathrow (LHR)

PNH — LHR
Apr 18 — Apr 251
Sat 4/18
Sat 4/25
1 adult, Economy
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1. Tell us where you want to go

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2. Select your favorite providers

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Find 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 March 19, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Popular in

January

Cheapest in

August

Average price

$1,169
Provider with most accurate pricing for Phnom Penh Pochentong-London Heathrow flight deals.
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Provider most trusted by Cheapflights users for Phnom Penh Pochentong-London Heathrow flights.
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Highest demand for flights based on searches. 2% potential increase in price ($30 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in March 2026
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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 March.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
MytripPrice Accuracy2 starsTrust Score*3 stars
Trip.comPrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Phnom Penh-London Heathrow Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Phnom Penh-London Heathrow Airport flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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

What is the cheapest month to book a flight from Phnom Penh to London Heathrow Airport?

Currently, September is the cheapest month in which you can book a flight from Phnom Penh to London Heathrow Airport (average of $650). Flying from Phnom Penh to London Heathrow Airport in January is currently the most expensive (average of $1,302). 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.

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 March 19, 2026.
Read through reviews of airlines operating flights from Phnom Penh to London Heathrow Airport, such as Thai Airways,China Southern, andChina Eastern. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Thai Airways
7.8
Good
393 reviews

Boarding

7.9

Crew

8.4

Overall

7.8

Food

7.4

Entertainment

6.8

Comfort

7.6

Reviews

1 / 20
10.0
Excellent

Virendra,Jan 2026

DEL - BKK

Having required wheel chair assistance, I received amazing service from the ground and cabin staff. Everything was a breeze. Flight was comfortable but the entertainment system was quite dated. The chicken noodles served was amazing
Thai Airways
7.8
Good
393 reviews
Thai Airways
7.8
Good
393 reviews

Boarding

7.9

Crew

8.4

Overall

7.8

Food

7.4

Entertainment

6.8

Comfort

7.6

Reviews

1 / 20
10.0
Excellent

Virendra,Jan 2026

DEL - BKK

Having required wheel chair assistance, I received amazing service from the ground and cabin staff. Everything was a breeze. Flight was comfortable but the entertainment system was quite dated. The chicken noodles served was amazing
China Southern
7.4
Good
142 reviews
Thai Airways
7.8
Good
393 reviews

Boarding

7.9

Crew

8.4

Overall

7.8

Food

7.4

Entertainment

6.8

Comfort

7.6

Reviews

1 / 20
10.0
Excellent

Virendra,Jan 2026

DEL - BKK

Having required wheel chair assistance, I received amazing service from the ground and cabin staff. Everything was a breeze. Flight was comfortable but the entertainment system was quite dated. The chicken noodles served was amazing
China Eastern
7.2
Good
197 reviews
Thai Airways
7.8
Good
393 reviews

Boarding

7.9

Crew

8.4

Overall

7.8

Food

7.4

Entertainment

6.8

Comfort

7.6

Reviews

1 / 20
10.0
Excellent

Virendra,Jan 2026

DEL - BKK

Having required wheel chair assistance, I received amazing service from the ground and cabin staff. Everything was a breeze. Flight was comfortable but the entertainment system was quite dated. The chicken noodles served was amazing

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.

  • What airport do you fly from for flights from Phnom Penh to London Heathrow?

    Most people fly from Phnom Penh Pochentong (PNH) if they book a flight from Phnom Penh to London Heathrow. On average, Pochentong has 0 outbound flights to London Heathrow per day from 3 airlines. Phnom Penh Pochentong is conveniently located just 5.0 mi from Phnom Penh’s city center.

  • What are the cheapest airlines flying from Phnom Penh to London Heathrow Airport round-trip?

    Cheapflights users have booked flights from Phnom Penh to London Heathrow Airport round-trip from $638. Other airlines that can offer you cheap pricing are China Eastern, from $733, and Thai Airways, from $1,120. These flights start at 38% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Phnom Penh to London Heathrow Airport one-way?

    The cheapest airline one-way is China Southern, with whom users have recently found tickets for as low as $328. However, be on the lookout for offers from Malaysia Airlines and Thai Airways, as they are both options that can get you from Phnom Penh to London Heathrow Airport for a low price.

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

    Yes. In addition to deals on Phnom Penh to Heathrow flights, Cheapflights offers vacation packages that include both flights and hotel.

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

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

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

    Yes. Cheapflights offers flight deals from Phnom Penh to Heathrow 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 Phnom Penh to London Heathrow Airport?

    Currently, September is the cheapest month in which you can book a flight from Phnom Penh to London Heathrow Airport (average of $650). Flying from Phnom Penh to London Heathrow Airport in January is currently the most expensive (average of $1,302). 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.

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Top 3 airlines flying from Phnom Penh to Heathrow

Discover the top 3 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 March 19, 2026.
AirlineCheapestAverageFlexibilityOn-time
China SouthernCheapest$638Average$808FlexibilityNo cancel feeOn-time69%
China EasternCheapest$733Average$887FlexibilityNo cancel feeOn-time62%
Thai AirwaysCheapest$1,120Average$1,365FlexibilityNo cancel feeOn-time77%

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