United Kingdom
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KTI - LHR

£185 Find Cheap Flights from Phnom Penh to London – Compare and Save

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1 adult, Economy, 0 bags

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Everything you should know

Cheapest return flight
£453
Typical prices: £622-£968
XiamenAir
Sat 17/11Sun 25/11
KTI - LHR • 1 stop
Cheapest one-way flight
£185
Typical prices: £270-£514
XiamenAir
Wed 7/11
KTI - LHR • 1 stop
Direct flights
Not available
There are currently no direct flights between Phnom Penh and London Heathrow Airport. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to book
17 weeks
in advance
Our data shows that travellers who book at least 17 weeks in advance save around 50% compared to booking last minute.
Insights
Insights
When to travel
February
Cheapest • 16% price drop
January
Most popular
Good to know
+1
Good to know
+1
Top stopover airports
Shenzhen (SZX)
Cheapest • Avg £541 (return)
Bangkok Suvarnabhumi (BKK)
Shortest trip • 16h 02m (one-way)
Insights
Insights
Start a new search
KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you enjoy your trip to London Heathrow Airport!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Phnom Penh to Heathrow (KTI-LHR)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Phnom Penh to Heathrow

Tue, 17 Nov - Wed, 25 Nov
XiamenAir Logo
12:50 - 06:25KTI  Phnom Penh Techo Intl-LHR London Heathrow
24h 35m1 stop Xiamen Gaoqi Intl
XiamenAir Logo
12:30 - 11:45LHR  London Heathrow-KTI Phnom Penh Techo Intl
16h 15m1 stop Xiamen Gaoqi Intl
£453XiamenAir
Sat, 7 Nov - Thu, 19 Nov
Multiple Airlines Logo
18:10 - 06:25KTI  Phnom Penh Techo Intl-LHR London Heathrow
19h 15m1 stop Xiamen Gaoqi Intl
Multiple Airlines Logo
22:30 - 10:40LHR  London Heathrow-KTI Phnom Penh Techo Intl
29h 10m1 stop Shenzhen
£466Multiple Airlines
Sat, 7 Nov - Mon, 16 Nov
Multiple Airlines Logo
18:10 - 06:25KTI  Phnom Penh Techo Intl-LHR London Heathrow
19h 15m1 stop Xiamen Gaoqi Intl
Multiple Airlines Logo
21:10 - 10:40LHR  London Heathrow-KTI Phnom Penh Techo Intl
30h 30m1 stop Shenzhen
£478Multiple Airlines
Sat, 7 Nov - Sun, 15 Nov
Multiple Airlines Logo
18:10 - 06:25KTI  Phnom Penh Techo Intl-LHR London Heathrow
19h 15m1 stop Xiamen Gaoqi Intl
Multiple Airlines Logo
21:10 - 10:40LHR  London Heathrow-KTI Phnom Penh Techo Intl
30h 30m1 stop Shenzhen
£483Multiple Airlines
Sat, 24 Oct - Sun, 1 Nov
XiamenAir Logo
18:00 - 07:25KTI  Phnom Penh Techo Intl-LHR London Heathrow
19h 25m1 stop Xiamen Gaoqi Intl
XiamenAir Logo
12:30 - 17:05LHR  London Heathrow-KTI Phnom Penh Techo Intl
21h 35m1 stop Xiamen Gaoqi Intl
£499XiamenAir
Thu, 22 Oct - Sun, 1 Nov
XiamenAir Logo
18:00 - 06:35KTI  Phnom Penh Techo Intl-LHR London Heathrow
18h 35m1 stop Xiamen Gaoqi Intl
XiamenAir Logo
12:30 - 17:05LHR  London Heathrow-KTI Phnom Penh Techo Intl
21h 35m1 stop Xiamen Gaoqi Intl
£499XiamenAir
Thu, 5 Nov - Sun, 15 Nov
Multiple Airlines Logo
00:25 - 15:55KTI  Phnom Penh Techo Intl-LHR London Heathrow
22h 30m1 stop Beijing Capital
Multiple Airlines Logo
21:10 - 10:40LHR  London Heathrow-KTI Phnom Penh Techo Intl
30h 30m1 stop Shenzhen
£509Multiple Airlines
Thu, 5 Nov - Mon, 16 Nov
Multiple Airlines Logo
00:25 - 15:55KTI  Phnom Penh Techo Intl-LHR London Heathrow
22h 30m1 stop Beijing Capital
Multiple Airlines Logo
21:10 - 10:40LHR  London Heathrow-KTI Phnom Penh Techo Intl
30h 30m1 stop Shenzhen
£511Multiple Airlines
Sun, 20 Dec - Tue, 5 Jan
Etihad Airways Logo
08:15 - 18:10KTI  Phnom Penh Techo Intl-LHR London Heathrow
16h 55m1 stop Abu Dhabi Zayed Intl
Etihad Airways Logo
08:40 - 06:40LHR  London Heathrow-KTI Phnom Penh Techo Intl
15h 00m1 stop Abu Dhabi Zayed Intl
£710Etihad Airways
Sun, 20 Dec - Wed, 6 Jan
Etihad Airways Logo
08:15 - 18:10KTI  Phnom Penh Techo Intl-LHR London Heathrow
16h 55m1 stop Abu Dhabi Zayed Intl
Etihad Airways Logo
08:40 - 06:40LHR  London Heathrow-KTI Phnom Penh Techo Intl
15h 00m1 stop Abu Dhabi Zayed Intl
£710Etihad Airways
Booking Insights

Price, demand, and travel trends for Phnom Penh to London Heathrow Airport flights

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights with more confidence.

How much is a return flight from Phnom Penh to London Heathrow Airport?

Return flights from Phnom Penh to London Heathrow Airport typically range from £622 to £968. The lowest price found in the past 5 days was £453 on XiamenAir.

What's the cheapest day of the week to fly from Phnom Penh to London Heathrow Airport?

Based on deals KAYAK users found in the last 12 months, Wednesday is the cheapest day of the week to fly from Phnom Penh to London Heathrow Airport. It’s 16% cheaper than the average day, while Saturday is the most expensive, with prices 34% higher.

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

•February is the cheapest month to fly from Phnom Penh to London Heathrow Airport at £617 return.
•January (£1,261) and August (£965) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 104% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are flights from Phnom Penh to London Heathrow Airport the cheapest?

Flights from Phnom Penh to London Heathrow Airport are cheapest 17 weeks before departure. Booking in this window typically costs about 50% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Find deals

Key details for Phnom Penh to London Heathrow Airport flights

Low season

October

Cheapest flight

£185
Beat the crowds with an average 26% drop in traveller numbers.
The most popular month to fly with an average 11% increase in traveller numbers.
One-way flight from Phnom Penh to London Heathrow Airport

When to book flights from Phnom Penh to Heathrow

Are your dates flexible? Find out the best times to travel from Phnom Penh to Heathrow based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price

Your Phnom Penh to London Heathrow Airport flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines, and booking tips.

  • Which cabin classes can I book on flights from Phnom Penh to London Heathrow Airport?

    Three cabin classes are available on flights from Phnom Penh to London Heathrow Airport:

    • Economy class
    • Business Class
    • First Class

  • How long is a flight from Phnom Penh to London Heathrow Airport?

    A direct flight from Phnom Penh to London Heathrow Airport takes 00m, covering 6,246 miles.

  • Do I need a passport to fly from Phnom Penh to London Heathrow Airport?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How much should I expect to pay for a Phnom Penh to London Heathrow Airport flight?

    Return flights from Phnom Penh to London Heathrow Airport range from £622 to £968, with an average of £731 over the past 12 months. Anything below £622 counts as a good deal.

  • How expensive are last-minute Phnom Penh to London Heathrow Airport flights?

    Last-minute fares on this route (booked within two weeks of departure) run 45% above the £731 route average. Book 17 weeks before departure for the lowest fares.

  • Have flight prices from Phnom Penh to London Heathrow Airport changed much recently?

    Yes. Based on fares seen in the past 5 days, return flight prices on this route showed a wide range, from about £453 to £2,525. That means the highest observed fare was about 6x higher than the lowest one.

  • How are flight prices from Phnom Penh to London Heathrow Airport looking right now?

    One-way fares from Phnom Penh to London Heathrow Airport are currently lower than usual. Average one-way flight prices are about £212, which is 46% below the typical average for this route.

  • Which car hire options are available at London Heathrow Airport (LHR)?

    London Heathrow Airport (LHR) hosts 5 major car hire companies, with daily rates starting from around £5 for economy cars. Top options include:

    • GREEN MOTION
    • DRIVALIA
    • Europcar
    • Alamo
    • Hertz

  • Which airports can I use when flying from Phnom Penh to London Heathrow Airport?

    Flights from Phnom Penh to London Heathrow Airport usually depart from Phnom Penh Techo Intl (KTI) and arrive at London Heathrow (LHR).

  • Which airports do connecting flights from Phnom Penh to London Heathrow Airport pass through?

    One-stop flights from Phnom Penh to London Heathrow Airport most commonly connect through:

    • Abu Dhabi Zayed Intl (AUH) – 37% of one-stop connections
    • Guangzhou Baiyun (CAN) – 17% of one-stop connections
    • Bangkok Suvarnabhumi (BKK) – 10% of one-stop connections
    • Shanghai Pu Dong (PVG) – 10% of one-stop connections

  • Can I save money by using flexible dates for flights from Phnom Penh to London Heathrow Airport?

    Yes. Flexible dates can save you up to 38% on flights from Phnom Penh to London Heathrow Airport. Wednesday is the cheapest departure day at £617 return on average, while Saturday is the most expensive at £984, a difference of £366.

    KAYAK's flexible dates feature shows options up to three days before and after your selected dates, making it easier to compare nearby fares.

  • How much time can I save by choosing a different stopover airport from Phnom Penh to London Heathrow Airport?

    Flying via Bangkok Suvarnabhumi (BKK) gives the shortest average 1-stop total travel time of 16h 02m, compared to 17h 48m via Kuala Lumpur Intl (KUL) and 17h 51m via Abu Dhabi Zayed Intl (AUH).

  • What is the time difference between Phnom Penh and London Heathrow Airport?

    London Heathrow Airport is 6 hours behind Phnom Penh (British Time vs Indochina Time). Plan for the time shift when scheduling connections or first-day activities.

  • What popular places can I visit in London Heathrow Airport?

    Some of the most popular sights in London Heathrow Airport are Hyde Park, Tower Bridge, and Royal Albert Hall. These are among the most viewed places in London Heathrow Airport on KAYAK.

Your guide to booking Phnom Penh to London Heathrow Airport flights

Get tips on when to book, when to fly, and what to know before your trip.
  • If your dates are flexible, aim for a Wednesday departure and avoid flying on Saturday. On this route, Wednesday flights average £617, about £366 less than Saturday fares (37% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 17 weeks before you fly. On this route, that window historically saves about 50% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Phnom Penh to London Heathrow Airport trip for February. Fares historically average £617 return in that month – typically £644 less than the most expensive month, which is January (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to London Heathrow Airport.

    • Hilton London Heathrow Airport

More options for your flight from Phnom Penh to Heathrow

Complete your trip to London with a hotel stay or car hire

Car hire in London
Hotels in London
Holidays in London