Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Phnom Penh to London from $400

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Phnom Penh to London departing on 9/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize 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.
Search flight deals

Find the cheapest flights from Phnom Penh to London

Cheap round-trip flights

China Eastern Logo
12:10 am - 6:40 amPNH-LGW
36h 30m1 stop
China Eastern Logo
6:25 pm - 11:15 pmLGW-PNH
22h 50m1 stop
$668China Eastern
Find Deal
Sun, Aug 17 - Wed, Sep 17
China Eastern Logo
12:10 am - 6:40 amPNH-LGW
36h 30m1 stop
China Eastern Logo
11:35 am - 5:50 pmLGW-PNH
24h 15m2 stops
$669China Eastern
Find Deal
Sun, Aug 17 - Wed, Sep 17
China Eastern Logo
12:40 pm - 6:40 amPNH-LGW
24h 00m3 stops
China Eastern Logo
11:35 am - 5:50 pmLGW-PNH
24h 15m2 stops
$670China Eastern
Find Deal
Mon, Aug 18 - Wed, Sep 17
China Southern Logo
8:00 am - 7:00 pmPNH-LHR
17h 00m1 stop
China Southern Logo
10:10 pm - 10:40 amLHR-PNH
30h 30m1 stop
$738China Southern
Find Deal
Sat, Oct 11 - Thu, Oct 23
China Southern Logo
8:00 am - 7:00 pmPNH-LHR
17h 00m1 stop
China Southern Logo
9:00 pm - 12:10 amLHR-PNH
21h 10m2 stops
$742China Southern
Find Deal
Sat, Oct 11 - Thu, Oct 23
Qatar Airways Logo
5:10 pm - 7:20 amPNH-LHR
21h 10m2 stops
Qatar Airways Logo
8:40 am - 3:25 pmLHR-PNH
23h 45m2 stops
$947Qatar Airways
Find Deal
Fri, Dec 19 - Fri, Jan 2
British Airways Logo
5:40 pm - 6:40 amPNH-LGW
19h 00m2 stops
British Airways Logo
2:55 pm - 4:15 pmLGW-PNH
19h 20m2 stops
$980British Airways
Find Deal
Fri, Oct 3 - Sun, Oct 12
British Airways Logo
5:10 pm - 12:15 pmPNH-LHR
26h 05m2 stops
British Airways Logo
8:05 am - 3:25 pmLHR-PNH
24h 20m2 stops
$997British Airways
Find Deal
Fri, Dec 19 - Fri, Jan 2
Emirates Logo
8:50 pm - 12:55 pmPNH-STN
22h 05m2 stops
Emirates Logo
9:10 pm - 4:35 pmSTN-PNH
37h 25m2 stops
$1,238Emirates
Find Deal
Thu, Aug 14 - Thu, Aug 21
Emirates Logo
8:50 pm - 12:55 pmPNH-STN
22h 05m2 stops
Emirates Logo
9:10 pm - 4:35 pmSTN-PNH
37h 25m2 stops
$1,292Emirates
Find Deal
Fri, Aug 22 - Tue, Sep 2

China Southern flights from Phnom Penh to London

Our best China Southern deals on Phnom Penh to London flight tickets
China Southern
Oct 11
PNH8:00 amPhnom Penh Pochentong
17h 00m
1 stop
LHR7:00 pmLondon Heathrow
Oct 23
LHR10:10 pmLondon Heathrow
30h 30m
1 stop
PNH10:40 amPhnom Penh Pochentong
$738
Find similar
China Southern
Oct 11
PNH8:00 amPhnom Penh Pochentong
17h 00m
1 stop
LHR7:00 pmLondon Heathrow
Oct 23
LHR9:00 pmLondon Heathrow
21h 10m
2 stops
PNH12:10 amPhnom Penh Pochentong
$742
Find similar
China Southern
Aug 22
PNH3:35 pmPhnom Penh Pochentong
56h 30m
2 stops
LHR6:05 pmLondon Heathrow
Sep 2
LHR10:10 pmLondon Heathrow
30h 30m
1 stop
PNH10:40 amPhnom Penh Pochentong
$754
Find similar

China Eastern flights from Phnom Penh to London

Our best China Eastern deals on Phnom Penh to London flight tickets
China Eastern
Aug 17
PNH12:10 amPhnom Penh Pochentong
36h 30m
1 stop
LGW6:40 amLondon Gatwick
Sep 17
LGW6:25 pmLondon Gatwick
22h 50m
1 stop
PNH11:15 pmPhnom Penh Pochentong
$668
Find similar
China Eastern
Aug 17
PNH12:10 amPhnom Penh Pochentong
36h 30m
1 stop
LGW6:40 amLondon Gatwick
Sep 17
LGW11:35 amLondon Gatwick
24h 15m
2 stops
PNH5:50 pmPhnom Penh Pochentong
$669
Find similar
China Eastern
Aug 18
PNH12:40 pmPhnom Penh Pochentong
24h 00m
3 stops
LGW6:40 amLondon Gatwick
Sep 17
LGW11:35 amLondon Gatwick
24h 15m
2 stops
PNH5:50 pmPhnom Penh Pochentong
$670
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Phnom Penh to London 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, momondo users made 832,500 searches. Data last updated July 31, 2025.
Use the filters below to find and compare flights from Phnom Penh to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Phnom PenhLondon

PNH - LGW

PNHLGW

Phnom Penh Pochentong

Sun 8/17

12:10 am-6:40 am

1 stop36h 30m

London Gatwick

Wed 9/17

6:25 pm-11:15 pm

1 stop22h 50m

$668

Phnom PenhLondon

PNH - LGW

PNHLGW

Phnom Penh Pochentong

Sun 8/17

12:10 am-6:40 am

1 stop36h 30m

London Gatwick

Wed 9/17

11:35 am-5:50 pm

2 stops24h 15m

$669

Phnom PenhLondon

PNH - LGW

PNHLGW

Phnom Penh Pochentong

Mon 8/18

12:40 pm-6:40 am

3 stops24h 00m

London Gatwick

Wed 9/17

11:35 am-5:50 pm

2 stops24h 15m

$670

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Sat 10/11

8:00 am-7:00 pm

1 stop17h 00m

London Heathrow

Thu 10/23

10:10 pm-10:40 am

1 stop30h 30m

$738

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Sat 10/11

8:00 am-7:00 pm

1 stop17h 00m

London Heathrow

Thu 10/23

9:00 pm-12:10 am

2 stops21h 10m

$742

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Fri 12/19

5:10 pm-7:20 am

2 stops21h 10m

London Heathrow

Fri 1/2

8:40 am-3:25 pm

2 stops23h 45m

$947

Phnom PenhLondon

PNH - LGW

PNHLGW

Phnom Penh Pochentong

Fri 10/3

5:40 pm-6:40 am

2 stops19h 00m

London Gatwick

Sun 10/12

2:55 pm-4:15 pm

2 stops19h 20m

$980

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Fri 12/19

5:10 pm-12:15 pm

2 stops26h 05m

London Heathrow

Fri 1/2

8:05 am-3:25 pm

2 stops24h 20m

$997

Phnom PenhLondon

PNH - STN

PNHSTN

Phnom Penh Pochentong

Thu 8/14

8:50 pm-12:55 pm

2 stops22h 05m

London Stansted

Thu 8/21

9:10 pm-4:35 pm

2 stops37h 25m

$1,238

Phnom PenhLondon

PNH - STN

PNHSTN

Phnom Penh Pochentong

Fri 8/22

8:50 pm-12:55 pm

2 stops22h 05m

London Stansted

Tue 9/2

9:10 pm-4:35 pm

2 stops37h 25m

$1,292

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to London from

How to get the cheapest flight ticket from Phnom Penh to London

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 typical price of a round-trip flight between Phnom Penh and London?

What is the cheapest month to fly to London?

The cheapest month to fly to London from Phnom Penh is in November. Flight prices, which tend to average around $728, are often lower during this time because this is during the off-season. The month of March is another great option to travel to London, with average flight prices from Phnom Penh averaging around $772.

What is the cheapest day to depart on your flight to London?

The cheapest day to depart from Phnom Penh to London is on a Saturday. Travelers who choose to depart for London on a Saturday will often find tickets for as low as $837. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $1,043. These prices are subject to change though, so be sure to set up a Price Alert for flights to London.

What is the cheapest time of day to depart on your flight to London?

Flying to London from Phnom Penh in the evening is the least expensive time of day to depart. momondo users have found prices as low as $787 when looking at flights departing in the evening. Flights to London are more costly in the afternoon, with an average ticket price of $1,145. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

How far in advance should I book a flight to London?

You are more likely to see cheaper flights to London from Phnom Penh when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around $1,050 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Phnom Penh for as low as $814 on momondo.

How have Phnom Penh to London flight prices changed over time?

As of July 2025, prices for Phnom Penh to London flights are approximately 27% cheaper when compared to flights at the same time last year.

When to book flights from Phnom Penh to London

Are you open to changing your travel dates? Check out the ideal times to fly from Phnom Penh to London according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Phnom Penh to London (PNH to LON) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Phnom Penh to London

Best Price Found

$400

Fastest flight time

15h 35m

Direct flights

None

Airports in London

4 airports
The best one-way flight to London from Phnom Penh in the past 72 hours is $400. The best round-trip flight deal from Phnom Penh to London found on momondo in the last 72 hours is $668.
The fastest flight from Phnom Penh to London takes 15h 35m
There are no direct flights from Phnom Penh to London. Popular non-direct routes for this connection are Phnom Penh Pochentong Airport - London Gatwick Airport, Phnom Penh Pochentong Airport - London Stansted Airport and Phnom Penh Pochentong Airport - London Heathrow Airport.
There are 4 airports near London: London City (LCY), London Heathrow (LHR), London Stansted (STN), London Gatwick (LGW)
Search flight deals

  • How far is Phnom Penh Pochentong to London by plane?

    London is 6219.7 mi away from Phnom Penh Pochentong. 15h 35m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Phnom Penh Pochentong Airport to London?

    Prices for flights from Phnom Penh Pochentong Airport to London are updated daily.

  • How many operators does momondo search for flights from Phnom Penh Pochentong Airport to London?

  • How old do you have to be to fly from Phnom Penh Pochentong Airport to London?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Phnom Penh Pochentong Airport to London.

  • What documentation or ID do you need to fly to London?

    The necessary travel and health documents for your London 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 Phnom Penh to London?

Best airlines flying from Phnom Penh to London

Compare and see reviews for airlines that fly from Phnom Penh to London with momondo
Airline
Rating
Free Cancellation
Price
China EasternPriceFrom $633Free CancellationRating
7.2
158 reviews
Search China Eastern flights
China SouthernPriceFrom $664Free CancellationRating
7.6
104 reviews
Search China Southern flights
Air ChinaPriceFrom $706Free CancellationRating
7.3
93 reviews
Search Air China flights
Malaysia AirlinesPriceFrom $865Free CancellationRating
7.4
271 reviews
Search Malaysia Airlines flights
Singapore AirlinesPriceFrom $921Free CancellationRating
8.1
1,338 reviews
Search Singapore Airlines flights
Qatar AirwaysPriceFrom $968Free CancellationRating
7.4
3,609 reviews
Search Qatar Airways flights
Thai AirwaysPriceFrom $1,120Free CancellationRating
7.8
340 reviews
Search Thai Airways flights

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Gatwick
Hounslow
Dover
Slough
Luton
Dartford
Guildford
Milton Keynes
Stansted
Hayes
Crawley
Croydon
Chelmsford
Ilford
Brentwood
Colchester
Folkestone
Watford
Canterbury
Richmond

Why use momondo?

Why should I use momondo to find a flight deal from Phnom Penh to London?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Phnom Penh to London for you.

Can I find flights from Phnom Penh to London with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to London from Phnom Penh with this policy.

How can momondo help me find flights from Phnom Penh to London?

Once all potential Phnom Penh to London flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Phnom Penh to London right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to London from Phnom Penh. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your London trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Tue 8/5
Tue 8/12
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United Kingdom

Fly into one of these airports located in London

Airports listed have a maximum distance of 35.6 mi from London
London City Airport
London Gatwick Airport
London Heathrow Airport
London Luton Airport
London Southend Airport
London Stansted Airport