Cheap flights from London to Phnom Penh from £316
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London to Phnom Penh departing on 1/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
Big names, great deals
Big names, great deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customise your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from London to Phnom Penh
Cheap return flights
Cheap one-way flights
Cheap last-minute flights
Shenzhen Airlines flights from London to Phnom Penh
Our best Shenzhen Airlines deals on London to Phnom Penh flight tickets
Etihad Airways flights from London to Phnom Penh
Our best Etihad Airways deals on London to Phnom Penh flight tickets
See travel insights to Phnom Penh from
How to get the cheapest flight ticket from London to Phnom Penh
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Phnom Penh?
The month of March is another great option to travel to Phnom Penh, with average flight prices from London averaging around £562.
What is the cheapest day to depart on your flight to Phnom Penh?
Our data shows that Monday is the least expensive day to fly to Phnom Penh. Tickets to fly out on this day can be as low as £611. Be sure to avoid booking your departure on a Friday as prices are generally higher than usual. According to our data, the average ticket price to Phnom Penh on Friday is £711.
What is the cheapest time of day to depart on your flight to Phnom Penh?
Our data shows that the cheapest London to Phnom Penh flights are usually those with departure times in the evening. Our users have found flights to Phnom Penh in the evening for as low as £521. At midday is when there is more demand to fly to Phnom Penh, so prices are often more expensive at around £802 per ticket.
How far in advance should I book a flight to Phnom Penh?
You are more likely to see cheaper flights to Phnom Penh from London when booking 14 weeks ahead of your departure date. In general, you can expect to find flights to Phnom Penh for around £702 when searching 14 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Phnom Penh from London for as low as £604 on momondo.
Can stopping save me money on London to Phnom Penh flights?
You could potentially save up to 4% on your flight if you consider stops on a London to Phnom Penh flight.
How have London to Phnom Penh flight prices changed over time?
As of June 2025, prices for London to Phnom Penh flights are approximately 15% more expensive when compared to flights at the same time last year.
What is the cheapest airline that flies from London to Phnom Penh Pochentong?
Shenzhen Airlines, Air China, and China Eastern are the most popular carriers operating from London to Phnom Penh Pochentong
Which airlines fly to Phnom Penh?
China Southern, Air China and Singapore Airlines are the top three most popular airlines that fly to Phnom Penh from London according to our data. China Southern is the first choice among our users, with 35% of people opting to fly with this airline when travelling to Phnom Penh. Keep in mind that there are 13 different airlines that fly to Phnom Penh on a routine basis, so you have a few additional options to choose from.
When to book flights from London to Phnom Penh
Cheap London to Phnom Penh (LON to PNH) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from London to Phnom Penh
How far is London to Phnom Penh Pochentong by plane?
London and Phnom Penh Pochentong are 6219.7 mi apart from one another. By plane, this route typically takes 14h 30m.
When did momondo last update prices for flights from London to Phnom Penh Pochentong Airport?
Prices for flights from London to Phnom Penh Pochentong Airport are refreshed on a daily basis.
How many operators does momondo search for flights from London to Phnom Penh Pochentong Airport?
As of June 2025, there are 13 operators available to choose from for flights from London to Phnom Penh Pochentong Airport.
How old do you have to be to fly from London to Phnom Penh Pochentong Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London to Phnom Penh Pochentong Airport.
What documentation or ID do you need to fly to Phnom Penh Pochentong Airport?
The necessary travel and health documents for your Phnom Penh Pochentong Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from London to Phnom Penh?
Based on momondo bookings for this flight route, the most popular airline on flight routes from London to Phnom Penh is China Southern (29% of total bookings). The next most popular airlines are Air China (20%), Singapore Airlines (14%), and Thai Airways (11%).
Best airlines flying from London to Phnom Penh
Compare and see reviews for airlines that fly from London to Phnom Penh with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom £378 | Free Cancellation | Rating 6.7 13 reviews | |||
| PriceFrom £397 | Free Cancellation | Rating 7.5 99 reviews | |||
| PriceFrom £421 | Free Cancellation | Rating 7.2 92 reviews | |||
| PriceFrom £507 | Free Cancellation | Rating 7.2 150 reviews | |||
| PriceFrom £512 | Free Cancellation | Rating 7.4 1,211 reviews | |||
| PriceFrom £589 | Free Cancellation | Rating 8.1 1,302 reviews | |||
| PriceFrom £590 | Free Cancellation | Rating 7.4 263 reviews | |||
| PriceFrom £640 | Free Cancellation | Rating 6.6 7,011 reviews | |||
| PriceFrom £650 | Free Cancellation | Rating 7.5 194 reviews | |||
| PriceFrom £651 | Free Cancellation | Rating 7.5 892 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from London to Phnom Penh?
Finding the right flight to Phnom Penh from London is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Phnom Penh quick and easy, saving you time and money.
Can I find flights from London to Phnom Penh with flexible booking policies on momondo?
Yes. momondo enables you to select and highlight flights to Phnom Penh from London with this policy.
How can momondo help me find flights from London to Phnom Penh?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from London to Phnom Penh.
I’m not ready to book a flight from London to Phnom Penh right now. Can momondo alert me if prices change?
Yes. momondo can track prices for London to Phnom Penh flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.