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Cheap flights from Phnom Penh to London Heathrow Airport from £243

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 12/6. Fares are subject to change and may not be available on all flights or dates of travel.
PNH — LHR
31 Mar — 7 Apr1
1 adult

Cheapflights Tip: The best prices from Phnom Penh Pochentong to London Heathrow are usually found in October or May, booked 74 days in advance, depart on a Wednesday or Tuesday and return on a Monday

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 26 March 2025.

Round-trip from

£526

One-way from

£243

Popular in

July

Cheapest in

October

Average price

£667
China Eastern
  • China Eastern
  • 4/5-28/5
  • 2 total stops
  • 44h 25m total
  • Phnom Penh to London
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Shenzhen Airlines
  • Shenzhen Airlines
  • 12/6
  • 1 total stop
  • 37h 45m total
  • Phnom Penh to London
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Highest demand for flights based on searches. 13% potential increase in price (£93 potential increase over avg. return price).
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Cheapest flight prices on average. 4% potential price decrease (£25 potential savings vs. average return price).
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Average for round-trip flights in March 2025
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Find flight deals from Phnom Penh to Heathrow

Cheapest flights from Phnom Penh to Heathrow
Explore the most affordable flight options available from Phnom Penh to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 26 March 2025.

Sun 4/500:10PNH - LHR
1 stop24h 30mChina Eastern
Wed 28/521:20LHR - PNH
1 stop19h 55mChina Eastern
Deal found 25/3£526
Sun 6/412:15PNH - LHR
1 stop37h 35mShenzhen Airlines
Sat 3/522:05LHR - PNH
1 stop31h 05mShenzhen Airlines
Deal found 25/3£538
Sat 3/508:00PNH - LHR
2 stops38h 15mChina Southern
Fri 16/522:10LHR - PNH
1 stop30h 30mChina Southern
Deal found 25/3£547
Sat 5/400:20PNH - LHR
1 stop26h 10mMultiple Airlines
Sat 3/522:05LHR - PNH
1 stop31h 05mMultiple Airlines
Deal found 25/3£555
Wed 7/511:10PNH - LHR
1 stop24h 45mMalaysia Airlines
Tue 27/521:35LHR - PNH
1 stop30h 25mMalaysia Airlines
Deal found 25/3£637
Fri 9/500:20PNH - LHR
1 stop26h 10mAir China
Wed 14/522:40LHR - PNH
2 stops30h 30mAir China
Deal found 25/3£734
Tue 6/520:50PNH - LHR
2 stops25h 20mEmirates
Sun 18/509:05LHR - PNH
2 stops25h 30mEmirates
Deal found 25/3£770
Mon 5/519:25PNH - LHR
2 stops32h 45mFinnair
Mon 19/507:30LHR - PNH
2 stops19h 05mFinnair
Deal found 25/3£789
Tue 10/611:25PNH - LHR
1 stop24h 55mCathay Pacific
Tue 8/718:20LHR - PNH
1 stop17h 00mCathay Pacific
Deal found 25/3£832

Cheapflights Fare Finder

Customise your flight search to find flights from Phnom Penh to Heathrow 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 26 March 2025.
Use the filters below to find and compare flights from Phnom Penh to London Heathrow Airport that are best for you.

Fly from

Phnom Penh

Fly to

Heathrow

Route

Depart

Return

Price

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Sun 4/5

00:10-18:40

1 stop24h 30m

London Heathrow

Wed 28/5

21:20-23:15

1 stop19h 55m

£526

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Sun 6/4

12:15-19:50

1 stop37h 35m

London Heathrow

Sat 3/5

22:05-11:10

1 stop31h 05m

£538

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Sat 3/5

08:00-16:15

2 stops38h 15m

London Heathrow

Fri 16/5

22:10-10:40

1 stop30h 30m

£547

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Sat 5/4

00:20-20:30

1 stop26h 10m

London Heathrow

Sat 3/5

22:05-11:10

1 stop31h 05m

£555

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Wed 7/5

11:10-05:55

1 stop24h 45m

London Heathrow

Tue 27/5

21:35-10:00

1 stop30h 25m

£637

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Fri 9/5

00:20-20:30

1 stop26h 10m

London Heathrow

Wed 14/5

22:40-11:10

2 stops30h 30m

£734

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Tue 6/5

20:50-16:10

2 stops25h 20m

London Heathrow

Sun 18/5

09:05-16:35

2 stops25h 30m

£770

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Mon 5/5

19:25-22:10

2 stops32h 45m

London Heathrow

Mon 19/5

07:30-08:35

2 stops19h 05m

£789

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Tue 10/6

11:25-06:20

1 stop24h 55m

London Heathrow

Tue 8/7

18:20-17:20

1 stop17h 00m

£832

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Thu 12/6

12:15-20:00

1 stop37h 45m

£243

Flights are sorted by cheapest return flights first.

Deals found on 25/3

Showing 1-10 of 23 results
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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 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 Phnom Penh to London Heathrow Airport

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 return flight from Phnom Penh to Heathrow. Price data was last updated on 21 March 2025.

The price you pay for your flight from Phnom Penh to London Heathrow Airport may vary depending on when you book. For the best chance of a lower fare, look to book 74 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, January is the cheapest month in which you can book a flight from Phnom Penh to London Heathrow Airport (average of £112). Flying from Phnom Penh to London Heathrow Airport in August is currently the most expensive (average of £164). 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.

Rainfall in Heathrow by month

Plan your trip to Heathrow by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

Temperature in Heathrow by month

Plan your trip to Heathrow by taking into account the average temperature totals by month.

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

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 26 March 2025.
China Airlines
8.2
Very Good
722 reviews
Check prices

Crew

8.5

Entertainment

8.0

Overall

8.2

Food

7.8

Comfort

8.0

Boarding

8.3

Reviews

1 / 20
10.0
Excellent

Sopharith,Feb 2025

TPE - PNH

All are excellence, but we had to pay 150$ extra charge each person with our names in passports and tickets. It was just swiping between first names and last names. It might be our mistake when we bought the tickets, but I thought it was expensive just to swipe the names. Anyway, thanks a lot. All excellence
China Airlines
8.2
Very Good
722 reviews
China Airlines
8.2
Very Good
722 reviews
Check prices

Crew

8.5

Entertainment

8.0

Overall

8.2

Food

7.8

Comfort

8.0

Boarding

8.3

Reviews

1 / 20
10.0
Excellent

Sopharith,Feb 2025

TPE - PNH

All are excellence, but we had to pay 150$ extra charge each person with our names in passports and tickets. It was just swiping between first names and last names. It might be our mistake when we bought the tickets, but I thought it was expensive just to swipe the names. Anyway, thanks a lot. All excellence
Asiana Airlines
8.2
Very Good
441 reviews
China Airlines
8.2
Very Good
722 reviews
Check prices

Crew

8.5

Entertainment

8.0

Overall

8.2

Food

7.8

Comfort

8.0

Boarding

8.3

Reviews

1 / 20
10.0
Excellent

Sopharith,Feb 2025

TPE - PNH

All are excellence, but we had to pay 150$ extra charge each person with our names in passports and tickets. It was just swiping between first names and last names. It might be our mistake when we bought the tickets, but I thought it was expensive just to swipe the names. Anyway, thanks a lot. All excellence
Singapore Airlines
8.1
Very Good
1,284 reviews
China Airlines
8.2
Very Good
722 reviews
Check prices

Crew

8.5

Entertainment

8.0

Overall

8.2

Food

7.8

Comfort

8.0

Boarding

8.3

Reviews

1 / 20
10.0
Excellent

Sopharith,Feb 2025

TPE - PNH

All are excellence, but we had to pay 150$ extra charge each person with our names in passports and tickets. It was just swiping between first names and last names. It might be our mistake when we bought the tickets, but I thought it was expensive just to swipe the names. Anyway, thanks a lot. All excellence
Emirates
8.0
Very Good
3,190 reviews
China Airlines
8.2
Very Good
722 reviews
Check prices

Crew

8.5

Entertainment

8.0

Overall

8.2

Food

7.8

Comfort

8.0

Boarding

8.3

Reviews

1 / 20
10.0
Excellent

Sopharith,Feb 2025

TPE - PNH

All are excellence, but we had to pay 150$ extra charge each person with our names in passports and tickets. It was just swiping between first names and last names. It might be our mistake when we bought the tickets, but I thought it was expensive just to swipe the names. Anyway, thanks a lot. All excellence
Thai Airways
7.8
Good
317 reviews
China Airlines
8.2
Very Good
722 reviews
Check prices

Crew

8.5

Entertainment

8.0

Overall

8.2

Food

7.8

Comfort

8.0

Boarding

8.3

Reviews

1 / 20
10.0
Excellent

Sopharith,Feb 2025

TPE - PNH

All are excellence, but we had to pay 150$ extra charge each person with our names in passports and tickets. It was just swiping between first names and last names. It might be our mistake when we bought the tickets, but I thought it was expensive just to swipe the names. Anyway, thanks a lot. All excellence

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?

    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 Heathrow. 1 airline have flights from Pochentong to London Heathrow on a regular basis. Booking flights from Phnom Penh Pochentong to London Heathrow should not be difficult; the airport handles an average of 0 outbound flights to London Heathrow per day.

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

    Flying on China Eastern is currently your cheapest option to London Heathrow Airport, with prices starting at £526. Additional return tickets that might be worth considering are offered by Shenzhen Airlines and China Southern, with the lowest prices starting at £538 and £547, respectively. These flights start at 32% 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?

    For one-way options, check prices for Shenzhen Airlines. According to our data, you can fly for as low as £243. Users have also found prices from £250 and £250 on Air China and China Southern, respectively.

  • 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 holiday 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, January is the cheapest month in which you can book a flight from Phnom Penh to London Heathrow Airport (average of £112). Flying from Phnom Penh to London Heathrow Airport in August is currently the most expensive (average of £164). 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

Travelling to a place near Phnom Penh?

Book flights to Phnom Penh if you plan to visit one of these locations
Hounslow
Deal
Milton Keynes
Gatwick
Croydon
Luton
Slough
Eastbourne
Wembley
Northampton
Swindon
Hayes
Ilford
Crawley
Southend-on-Sea
Winchester
Maidstone
Ipswich
Watford
Southall

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Phnom Penh to Heathrow

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

Top airline flying from Phnom Penh to Heathrow

Discover the top airline 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 858,174 searches. Data last updated 26 March 2025.
AirlineCheapestAverageFlexibilityOn-time
China SouthernCheapest£501Average£614FlexibilityNo cancel feeOn-time69%
Search China Southern flights

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How does Cheapflights help users find flights from Phnom Penh to Heathrow?

Deals for Phnom Penh to Heathrow flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Phnom Penh to Heathrow?

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 Heathrow from Phnom Penh.

Can Cheapflights find flights from Phnom Penh to Heathrow with no change fees?

Need flexible booking options for your flight to Heathrow from Phnom Penh? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Phnom Penh to Heathrow become cheaper?

Yes, Cheapflights offers price alerts on Phnom Penh to Heathrow flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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