Question 1

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

Accepted Answer

Flying on China Southern is currently your cheapest option to London Heathrow Airport, with prices starting at £548. Additional return tickets that might be worth considering are offered by China Eastern and Air China, with the lowest prices starting at £607 and £728, respectively. These flights start at 28% lower than the current average price 3 months from now.

Question 2

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

Accepted Answer

For one-way options, check prices for China Southern. According to our data, you can fly for as low as £314. Users have also found prices from £344 and £347 on China Eastern and Thai Airways, respectively.

Question 3

How far ahead should I book a flight from Phnom Penh to London Heathrow Airport?

Accepted Answer

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 42 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Question 4

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

Accepted Answer

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.

Question 5

What is the cheapest day to fly from Phnom Penh to London Heathrow Airport?

Accepted Answer

Travellers seeking maximum savings on their Phnom Penh to London Heathrow Airport flight should consider departing on Thursday mornings when fares are most often at their lowest. Tuesday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Question 6

E

Accepted Answer

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.

Question 7

E

Accepted Answer

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).

Question 8

What is the cheapest day to fly round-trip from Phnom Penh to London Heathrow Airport?

Accepted Answer

Travelers have found that booking a Wednesday departure is the best way to save up to 47% on the cost of booking your flights compared to booking on days of the week where this route is of high demand.

Question 9

How far in advance should I book a flight from Phnom Penh to London Heathrow Airport?

Accepted Answer

Users have found that booking a flight from Phnom Penh to London Heathrow Airport at least 45 days early can save you up to 29% on average compared to booking a flight this week. If booking 45 days before your flight isn’t an option for you, users have found flights from Phnom Penh to London Heathrow Airport for as little as £578 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as £923 for flights departing within the next 3 days.

Question 10

What is the cheapest month to fly from Phnom Penh to London Heathrow Airport?

Accepted Answer

Our data shows that November tends to be the cheapest month to fly to London Heathrow Airport from Phnom Penh. Users have commonly found prices around £696 for the month, but tickets can be as low as £456. Due to multiple factors, prepare for potentially higher prices in July.

Question 11

What is the cheapest time of day to fly from PNH to LHR?

Accepted Answer

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.

Question 12

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

Accepted Answer

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.

Question 13

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

Accepted Answer

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

Question 14

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

Accepted Answer

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.

Question 15

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

Accepted Answer

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.

Question 16

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

Accepted Answer

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.

Question 17

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

Accepted Answer

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.

Question 18

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

Accepted Answer

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.

Question 19

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

Accepted Answer

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.

Round-trip from	£548
One-way from	£306
Popular in	July
Cheapest in	October
Average price	£1,096

Cheap flights from Phnom Penh to London Heathrow Airport from £306

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 4/8. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from Phnom Penh Pochentong to London Heathrow are usually found in October or March, booked 42 days in advance, depart on a Wednesday or Tuesday and return on a Monday

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Cheapest flights from Phnom Penh to HeathrowExplore 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 4 July 2025.

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 4 July 2025.

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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 27 June 2025.

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

How much does it cost for a return flight from Phnom Penh to London Heathrow Airport?

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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?

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

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

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

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

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

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

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

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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 4 July 2025.