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Cheap flights from Phnom Penh (PNH) to London (LON)

PNH — LON
Jan 20 — Jan 271
Tue 1/20
Tue 1/27
1 adult, Economy
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Find cheap flights from Phnom Penh to London with Cheapflights

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.

Find flight deals from Phnom Penh to London

Discover tips and strategies to find the most affordable flight options for your journey from Phnom Penh (PNH) to London (LON). 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 December 21, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Popular in

July

Cheapest in

November

Average price

$816
Provider with most accurate pricing for Phnom Penh Pochentong-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Phnom Penh Pochentong-London (LON) flights.
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($178 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($41 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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Compare providers for flights from Phnom Penh to London

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 London in December.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
Trip.comPrice Accuracy2 starsTrust 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 flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Phnom Penh-London flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Phnom Penh-London flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Phnom Penh-London flights, Cheapflights users trust eDreams the most. eDreams 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 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 London

Have a flexible travel schedule? Discover the best time to fly to London 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

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

Currently, August is the cheapest month in which you can book a flight from Phnom Penh to London (average of $660). Flying from Phnom Penh to London 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 LON?

Find hourly flight availability from Phnom Penh to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 21, 2025.

It’s optimal to fly from Phnom Penh to London at noon. By choosing this option you can save up to 48% on the cost of your flight, compared to a flight in the afternoon.

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. 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 London. Reviews last updated December 21, 2025.
Get a feel of what it's like to fly with Singapore Airlines, Thai Airways, and China Southern from Phnom Penh to London by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Singapore Airlines
8.1
Very good
1,414 reviews

Entertainment

8.0

Crew

8.6

Overall

8.1

Boarding

8.3

Food

7.8

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered
Singapore Airlines
8.1
Very good
1,414 reviews
Singapore Airlines
8.1
Very good
1,414 reviews

Entertainment

8.0

Crew

8.6

Overall

8.1

Boarding

8.3

Food

7.8

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered
Thai Airways
7.8
Good
369 reviews
Singapore Airlines
8.1
Very good
1,414 reviews

Entertainment

8.0

Crew

8.6

Overall

8.1

Boarding

8.3

Food

7.8

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered
China Southern
7.5
Good
122 reviews
Singapore Airlines
8.1
Very good
1,414 reviews

Entertainment

8.0

Crew

8.6

Overall

8.1

Boarding

8.3

Food

7.8

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered
China Eastern
7.2
Good
179 reviews
Singapore Airlines
8.1
Very good
1,414 reviews

Entertainment

8.0

Crew

8.6

Overall

8.1

Boarding

8.3

Food

7.8

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered
British Airways
6.7
Okay
7,602 reviews
Singapore Airlines
8.1
Very good
1,414 reviews

Entertainment

8.0

Crew

8.6

Overall

8.1

Boarding

8.3

Food

7.8

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered

Related info for your journey

Find useful and relevant information for your journey from Phnom Penh to London. 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?

    Phnom Penh Pochentong (PNH), located 5.0 mi from the city center, is the airport you fly out of when you book flights from Phnom Penh to London. 4 airlines have flights from Pochentong to London on a regular basis. Booking flights from Phnom Penh Pochentong to London should not be difficult; the airport handles an average of 0 outbound flights to London per day.

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

    According to our current data, China Eastern ($564), China Southern ($673), and Singapore Airlines ($1,002) offers the cheapest pricing from Phnom Penh to London. 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 one-way?

    For one-way options, check prices for China Southern. According to our data, you can fly for as low as $328. Users have also found prices from $380 and $401 on Thai Airways and Malaysia Airlines, respectively.

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

    When deciding which route to take from Phnom Penh to London consider Phnom Penh Pochentong - London Heathrow, Phnom Penh Pochentong - London Gatwick or Phnom Penh Pochentong - London City as they are the most popular.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Phnom Penh to London (average of $660). Flying from Phnom Penh to London 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.

See more FAQs

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Alternative routes for Phnom Penh to London

See prices for flight routes from nearby airports that may be better suited for you.
Phnom Penh to Heathrow flights

Top 4 airlines flying from Phnom Penh to London

Discover the top 4 airlines that operate flights from Phnom Penh to London. 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 December 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
China EasternCheapest$564Average$887FlexibilityNo cancel feeOn-time62%
China SouthernCheapest$673Average$739FlexibilityNo cancel feeOn-time69%
Singapore AirlinesCheapest$1,002Average$1,369FlexibilityNo cancel feeOn-time81%
Thai AirwaysCheapest$1,120Average$1,317FlexibilityNo cancel feeOn-time77%

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