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Cheap flights from Phnom Penh to London Heathrow Airport from £202

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 27/3. Fares are subject to change and may not be available on all flights or dates of travel.
PNH — LHR
27 Feb — 6 Mar1
1 adult

The best prices from Phnom Penh Pochentong to London Heathrow are usually found in May or March, 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 22 February 2025.

Round-trip from

£515

One-way from

£202

Popular in

July

Cheapest in

May

Average price

£1,024
China Southern
  • China Southern
  • 15/3-24/3
  • 3 total stops
  • 67h 40m total
  • Phnom Penh to London
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China Eastern
  • China Eastern
  • 27/3
  • 2 total stops
  • 33h 50m total
  • Phnom Penh to London
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Highest demand for flights based on searches. 11% potential increase in price (£85 potential increase over avg. return price).
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Cheapest flight prices on average. 3% potential price decrease (£22 potential savings vs. average return price).
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Average for round-trip flights in February 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 22 February 2025.

Sat 15/311:55PNH - LHR
1 stop37h 20mChina Southern
Mon 24/321:30LHR - PNH
2 stops30h 20mChina Southern
Deal found 21/2£515
Sat 15/312:15PNH - LHR
1 stop37h 55mShenzhen Airlines
Mon 24/321:10LHR - PNH
1 stop38h 40mShenzhen Airlines
Deal found 21/2£538
Fri 14/300:25PNH - LHR
1 stop22h 30mMultiple Airlines
Mon 24/321:10LHR - PNH
1 stop38h 40mMultiple Airlines
Deal found 21/2£548
Fri 14/300:25PNH - LHR
1 stop22h 30mAir China
Mon 24/317:40LHR - PNH
2 stops34h 35mAir China
Deal found 21/2£617
Wed 29/1000:15PNH - LHR
1 stop24h 15mChina Eastern
Sat 8/1121:00LHR - PNH
1 stop19h 15mChina Eastern
Deal found 21/2£648
Fri 1/820:50PNH - LHR
2 stops23h 35mEmirates
Sun 7/922:15LHR - PNH
2 stops36h 20mEmirates
Deal found 21/2£792
Thu 30/1019:25PNH - LHR
2 stops44h 45mFinnair
Sat 8/1107:30LHR - PNH
2 stops23h 55mFinnair
Deal found 21/2£815
Fri 6/617:40PNH - LHR
3 stops22h 40mQatar Airways
Thu 19/613:45LHR - PNH
2 stops20h 30mQatar Airways
Deal found 21/2£936
Tue 16/917:45PNH - LHR
2 stops29h 10mVietnam Airlines
Thu 25/909:00LHR - PNH
3 stops22h 00mVietnam Airlines
Deal found 21/2£1,191
Mon 3/317:10PNH - LHR
2 stops26h 05mBritish Airways
Wed 7/516:00LHR - PNH
2 stops18h 15mBritish Airways
Deal found 20/2£2,408
Wed 8/1018:30PNH - LHR
1 stop29h 45mCathay Pacific
Mon 8/1222:05LHR - PNH
1 stop29h 20mCathay Pacific
Deal found 22/2£2,721
Fri 10/1018:20PNH - LHR
1 stop28h 15mMalaysia Airlines
Thu 11/1210:25LHR - PNH
1 stop16h 25mMalaysia Airlines
Deal found 22/2£2,830

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 22 February 2025.

Fly from

Phnom Penh

Fly to

Heathrow

Route

Depart

Return

Price

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Sat 15/3

11:55-18:15

1 stop37h 20m

London Heathrow

Mon 24/3

21:30-10:50

2 stops30h 20m

£515

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Sat 15/3

12:15-19:10

1 stop37h 55m

London Heathrow

Mon 24/3

21:10-18:50

1 stop38h 40m

£538

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Fri 14/3

00:25-15:55

1 stop22h 30m

London Heathrow

Mon 24/3

21:10-18:50

1 stop38h 40m

£548

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Fri 14/3

00:25-15:55

1 stop22h 30m

London Heathrow

Mon 24/3

17:40-11:15

2 stops34h 35m

£617

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Fri 1/8

12:40-18:40

2 stops60h 00m

London Heathrow

Sun 7/9

21:20-23:15

1 stop19h 55m

£697

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Fri 1/8

20:50-14:25

2 stops23h 35m

London Heathrow

Sun 7/9

22:15-16:35

2 stops36h 20m

£792

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Sun 4/5

19:25-12:10

2 stops46h 45m

London Heathrow

Sun 18/5

10:20-08:35

2 stops40h 15m

£817

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Fri 6/6

17:40-10:20

3 stops22h 40m

London Heathrow

Thu 19/6

13:45-16:15

2 stops20h 30m

£936

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Fri 6/6

14:10-17:50

2 stops57h 40m

London Heathrow

Fri 20/6

06:15-13:00

3 stops24h 45m

£1,607

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Wed 5/3

17:10-06:25

2 stops20h 15m

London Heathrow

Wed 7/5

15:35-16:15

2 stops18h 40m

£2,408

Flights are sorted by cheapest return flights first.

Deals found on 22/2

Showing 1-10 of 27 results
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2
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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 14 February 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 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 August is currently the most expensive (average of £163). 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 22 February 2025.

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 22 February 2025.
Read through reviews of airlines operating flights from Phnom Penh to London, such as China Airlines, Emirates and KLM. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
China Airlines
8.2
Very Good
725 reviews
Check prices

Comfort

8.0

Overall

8.2

Entertainment

8.0

Crew

8.5

Boarding

8.3

Food

7.8

Reviews

1 / 20

6.0
Good

Alex,Dec 2024

SYD - TPE

For the money it’s good value. Seat space rather small

China Airlines
8.2
Very Good
725 reviews
China Airlines
8.2
Very Good
725 reviews
Check prices

Comfort

8.0

Overall

8.2

Entertainment

8.0

Crew

8.5

Boarding

8.3

Food

7.8

Reviews

1 / 20

6.0
Good

Alex,Dec 2024

SYD - TPE

For the money it’s good value. Seat space rather small

Emirates
8.1
Very Good
3,278 reviews
China Airlines
8.2
Very Good
725 reviews
Check prices

Comfort

8.0

Overall

8.2

Entertainment

8.0

Crew

8.5

Boarding

8.3

Food

7.8

Reviews

1 / 20

6.0
Good

Alex,Dec 2024

SYD - TPE

For the money it’s good value. Seat space rather small

KLM
7.8
Good
1,330 reviews
China Airlines
8.2
Very Good
725 reviews
Check prices

Comfort

8.0

Overall

8.2

Entertainment

8.0

Crew

8.5

Boarding

8.3

Food

7.8

Reviews

1 / 20

6.0
Good

Alex,Dec 2024

SYD - TPE

For the money it’s good value. Seat space rather small

Thai Airways
7.8
Good
317 reviews
China Airlines
8.2
Very Good
725 reviews
Check prices

Comfort

8.0

Overall

8.2

Entertainment

8.0

Crew

8.5

Boarding

8.3

Food

7.8

Reviews

1 / 20

6.0
Good

Alex,Dec 2024

SYD - TPE

For the money it’s good value. Seat space rather small

China Southern
7.6
Good
87 reviews
China Airlines
8.2
Very Good
725 reviews
Check prices

Comfort

8.0

Overall

8.2

Entertainment

8.0

Crew

8.5

Boarding

8.3

Food

7.8

Reviews

1 / 20

6.0
Good

Alex,Dec 2024

SYD - TPE

For the money it’s good value. Seat space rather small

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 Southern is currently your cheapest option to London Heathrow Airport, with prices starting at £515. Additional return tickets that might be worth considering are offered by Shenzhen Airlines and Air China, with the lowest prices starting at £538 and £617, respectively. 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?

    For one-way options, check prices for China Eastern. According to our data, you can fly for as low as £202. Users have also found prices from £234 and £251 on China Southern and Shenzhen Airlines, 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 £163). 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 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 22 February 2025.
AirlineCheapestAverageFlexibilityOn-time
China SouthernCheapest£507Average£523FlexibilityNo cancel feeOn-time69%
Search China Southern 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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