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Cheap flights from Phnom Penh to London Heathrow Airport from £258

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 9/2. Fares are subject to change and may not be available on all flights or dates of travel.
PNH — LHR
22 Dec — 29 Dec1
1 adult

The best prices from Phnom Penh Pochentong to London Heathrow are usually found in March or May, booked 70 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 17 December 2024.

Round-trip from

£525

One-way from

£258

Popular in

July

Cheapest in

March

Average price

£671
China Southern
  • China Southern
  • 6/2-16/2
  • 2 total stops
  • 47h 05m total
  • Phnom Penh to London
China Southern
  • China Southern
  • 9/2
  • 1 total stop
  • 37h 20m total
  • Phnom Penh to London
High demand for flights, 11% potential price rise
Best time to find cheap flights, 3% potential price drop
Average for round-trip flights in December 2024

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 17 December 2024.

Mon 16/1200:15PNH - LHR
1 stop20h 40mChina Eastern
Tue 7/121:00LHR - PNH
1 stop19h 15mChina Eastern
Deal found 16/12£568
Wed 18/1211:05PNH - LHR
2 stops33h 50mMultiple Airlines
Wed 8/121:10LHR - PNH
1 stop38h 40mMultiple Airlines
Deal found 17/12£637
Mon 30/1211:45PNH - LHR
1 stop34h 15mCathay Pacific
Tue 21/111:00LHR - PNH
1 stop16h 25mCathay Pacific
Deal found 16/12£710
Tue 17/1221:30PNH - LHR
2 stops23h 20mEmirates
Tue 7/119:00LHR - PNH
2 stops40h 25mEmirates
Deal found 16/12£995
Tue 17/1208:00PNH - LHR
1 stop17h 15mChina Southern
Tue 7/122:00LHR - PNH
1 stop18h 30mChina Southern
Deal found 16/12£1,056
Sun 22/1200:25PNH - LHR
1 stop24h 25mAir China
Fri 27/1217:40LHR - PNH
1 stop22h 30mAir China
Deal found 15/12£4,018
Mon 23/1217:10PNH - LHR
3 stops23h 20mQatar Airways
Fri 27/1208:35LHR - PNH
2 stops23h 50mQatar Airways
Deal found 15/12£4,276

Find flights from Phnom Penh to Heathrow within your budget

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 17 December 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Thu 6/2

08:00-18:15

1 stop17h 15m

London Heathrow

Sun 16/2

22:00-10:50

1 stop29h 50m

£525

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Fri 21/2

12:15-19:10

1 stop37h 55m

London Heathrow

Sun 2/3

21:10-11:15

1 stop31h 05m

£559

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Thu 20/2

00:15-13:55

1 stop20h 40m

London Heathrow

Sun 2/3

21:00-23:15

1 stop19h 15m

£564

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Wed 5/2

00:25-17:50

1 stop24h 25m

London Heathrow

Sun 16/2

21:10-11:15

1 stop31h 05m

£566

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Mon 30/12

11:45-15:00

1 stop34h 15m

London Heathrow

Tue 21/1

11:00-10:25

1 stop16h 25m

£710

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Tue 6/5

00:20-20:30

1 stop26h 10m

London Heathrow

Fri 26/9

20:25-23:00

1 stop20h 35m

£712

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Sun 4/5

20:50-14:25

2 stops23h 35m

London Heathrow

Thu 25/9

14:20-16:35

2 stops20h 15m

£775

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Tue 6/5

17:40-06:25

2 stops18h 45m

London Heathrow

Sat 27/9

13:45-16:15

2 stops20h 30m

£831

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Mon 5/5

17:30-06:25

2 stops18h 55m

London Heathrow

Sun 28/9

16:00-16:00

2 stops18h 00m

£874

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Wed 7/5

14:10-16:55

1 stop32h 45m

London Heathrow

Thu 25/9

19:10-16:55

1 stop15h 45m

£1,353

Flights are sorted by cheapest return flights first.

Deals found on 17/12

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.

Travel insights for flights from Phnom Penh to Heathrow

Get recent, data-driven insights about flights from Phnom Penh to Heathrow including ideal travel times, pricing trends, and more.

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 13 December 2024.

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 69 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 July is currently the most expensive (average of £160). 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 17 December 2024.

One of the essential ways to save on airfare from Phnom Penh to London Heathrow Airport is to remain as flexible as possible. Flights that are at midday tend to be the most expensive. A flight in the morning could potentially save you up to 49% on airfare.

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 17 December 2024.
Read through reviews of airlines operating flights from Phnom Penh to London, such as China Eastern, Cathay Pacific and Air China. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
8.3
Very Good
476 reviews

Food

8.1

Boarding

8.4

Comfort

8.1

Overall

8.3

Entertainment

7.9

Crew

8.6

Reviews

1 / 10

Next time I never flight with Asiana Airlines, not anymore, this is my first time also my last time

8.3
Very Good
476 reviews
8.3
Very Good
476 reviews

Food

8.1

Boarding

8.4

Comfort

8.1

Overall

8.3

Entertainment

7.9

Crew

8.6

Reviews

1 / 10

Next time I never flight with Asiana Airlines, not anymore, this is my first time also my last time

8.1
Very Good
3,411 reviews
8.3
Very Good
476 reviews

Food

8.1

Boarding

8.4

Comfort

8.1

Overall

8.3

Entertainment

7.9

Crew

8.6

Reviews

1 / 10

Next time I never flight with Asiana Airlines, not anymore, this is my first time also my last time

8.1
Very Good
1,329 reviews
8.3
Very Good
476 reviews

Food

8.1

Boarding

8.4

Comfort

8.1

Overall

8.3

Entertainment

7.9

Crew

8.6

Reviews

1 / 10

Next time I never flight with Asiana Airlines, not anymore, this is my first time also my last time

7.8
Good
359 reviews
8.3
Very Good
476 reviews

Food

8.1

Boarding

8.4

Comfort

8.1

Overall

8.3

Entertainment

7.9

Crew

8.6

Reviews

1 / 10

Next time I never flight with Asiana Airlines, not anymore, this is my first time also my last time

7.5
Good
844 reviews
8.3
Very Good
476 reviews

Food

8.1

Boarding

8.4

Comfort

8.1

Overall

8.3

Entertainment

7.9

Crew

8.6

Reviews

1 / 10

Next time I never flight with Asiana Airlines, not anymore, this is my first time also my last time

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. 3 airlines 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 Southern is currently your cheapest option to London Heathrow Airport, with prices starting at £525. Additional return tickets that might be worth considering are offered by Shenzhen Airlines and China Eastern, with the lowest prices starting at £559 and £564, respectively. These flights start at 35% 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 China Southern. According to our data, you can fly for as low as £258. Users have also found prices from £259 and £263 on Shenzhen Airlines and Air China, 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 July is currently the most expensive (average of £160). 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

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.

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 858,174 searches. Data last updated 17 December 2024.
AirlineCheapestAverageFlexibilityOn-time
China SouthernCheapest£464Average£529FlexibilityNo cancel feeOn-time69%
Search China Southern flights
China EasternCheapest£554Average£664FlexibilityNo cancel feeOn-time62%
Search China Eastern flights
Thai AirwaysCheapest£919Average£1,334FlexibilityNo cancel feeOn-time77%
Search Thai Airways flights

Fly with Cheapflights

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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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