United Kingdom
GBP

LHR - KTI

£274 Find Cheap Flights from London Heathrow Airport to Phnom Penh – Compare and Save

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Everything you should know

Cheapest return flight
£409
Typical prices: £605-£905
China Southern
Mon 19/11Wed 5/12
LHR - KTI • 1 stop
Cheapest one-way flight
£274
Typical prices: £381-£600
Shenzhen Airlines
Thu 8/11
LHR - KTI • 1 stop
Direct flights
Not available
There are currently no direct flights between London Heathrow Airport and Phnom Penh. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to book
3 weeks
in advance
Our data shows that travellers who book at least 3 weeks in advance save around 15% compared to booking last minute.
Insights
Insights
When to travel
June
Cheapest • 18% price drop
December
Most popular
Good to know
+1
Good to know
+1
Top stopover airports
Xiamen Gaoqi Intl (XMN)
Cheapest • Avg £428 (return)
Bangkok Suvarnabhumi (BKK)
Shortest trip • 15h 50m (one-way)
Insights
Insights
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KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you enjoy your trip to Phnom Penh!
Flight Deals
Booking Insights
Flight Deals

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

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

Recent return flight deals from Heathrow to Phnom Penh

Thu, 19 Nov - Sat, 5 Dec
China Southern Logo
22:00 - 15:05LHR  London Heathrow-KTI Phnom Penh Techo Intl
34h 05m1 stop Guangzhou Baiyun
China Southern Logo
16:10 - 18:35KTI  Phnom Penh Techo Intl-LHR London Heathrow
33h 25m1 stop Guangzhou Baiyun
£409China Southern
Tue, 10 Nov - Tue, 24 Nov
China Southern Logo
22:00 - 15:05LHR  London Heathrow-KTI Phnom Penh Techo Intl
34h 05m1 stop Guangzhou Baiyun
China Southern Logo
11:55 - 18:35KTI  Phnom Penh Techo Intl-LHR London Heathrow
37h 40m1 stop Guangzhou Baiyun
£410China Southern
Wed, 11 Nov - Tue, 24 Nov
Air China Logo
20:25 - 23:10LHR  London Heathrow-KTI Phnom Penh Techo Intl
19h 45m1 stop Beijing Capital
Air China Logo
00:25 - 17:50KTI  Phnom Penh Techo Intl-LHR London Heathrow
24h 25m1 stop Beijing Capital
£414Air China
Wed, 11 Nov - Tue, 24 Nov
Air China Logo
20:25 - 23:10LHR  London Heathrow-KTI Phnom Penh Techo Intl
19h 45m1 stop Beijing Capital
Air China Logo
00:25 - 15:55KTI  Phnom Penh Techo Intl-LHR London Heathrow
22h 30m1 stop Beijing Capital
£415Air China
Wed, 28 Oct - Tue, 10 Nov
XiamenAir Logo
12:30 - 17:05LHR  London Heathrow-KTI Phnom Penh Techo Intl
21h 35m1 stop Xiamen Gaoqi Intl
XiamenAir Logo
12:50 - 06:25KTI  Phnom Penh Techo Intl-LHR London Heathrow
24h 35m1 stop Xiamen Gaoqi Intl
£421XiamenAir
Wed, 4 Nov - Tue, 10 Nov
XiamenAir Logo
12:30 - 17:05LHR  London Heathrow-KTI Phnom Penh Techo Intl
21h 35m1 stop Xiamen Gaoqi Intl
XiamenAir Logo
12:50 - 06:25KTI  Phnom Penh Techo Intl-LHR London Heathrow
24h 35m1 stop Xiamen Gaoqi Intl
£423XiamenAir
Sat, 21 Nov - Sat, 28 Nov
Shenzhen Airlines Logo
21:10 - 10:40LHR  London Heathrow-KTI Phnom Penh Techo Intl
30h 30m1 stop Shenzhen
Shenzhen Airlines Logo
11:40 - 19:10KTI  Phnom Penh Techo Intl-LHR London Heathrow
38h 30m1 stop Shenzhen
£437Shenzhen Airlines
Thu, 29 Oct - Tue, 10 Nov
Shenzhen Airlines Logo
22:30 - 10:40LHR  London Heathrow-KTI Phnom Penh Techo Intl
29h 10m1 stop Shenzhen
Shenzhen Airlines Logo
11:40 - 19:10KTI  Phnom Penh Techo Intl-LHR London Heathrow
38h 30m1 stop Shenzhen
£437Shenzhen Airlines
Tue, 1 Dec - Fri, 4 Dec
China Eastern Logo
12:30 - 00:15LHR  London Heathrow-KTI Phnom Penh Techo Intl
28h 45m1 stop Shanghai Pu Dong
China Eastern Logo
01:25 - 17:30KTI  Phnom Penh Techo Intl-LHR London Heathrow
23h 05m1 stop Shanghai Pu Dong
£614China Eastern
Thu, 26 Nov - Mon, 7 Dec
China Eastern Logo
12:30 - 00:15LHR  London Heathrow-KTI Phnom Penh Techo Intl
28h 45m1 stop Shanghai Pu Dong
China Eastern Logo
01:25 - 17:30KTI  Phnom Penh Techo Intl-LHR London Heathrow
23h 05m1 stop Shanghai Pu Dong
£614China Eastern
Booking Insights

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

Return flights from London Heathrow Airport to Phnom Penh typically range from £605 to £905. The lowest price found in the past 5 days was £409 on China Southern.

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

Based on deals KAYAK users found in the last 12 months, Saturday is the cheapest day of the week to fly from London Heathrow Airport to Phnom Penh. It’s 10% cheaper than the average day, while Wednesday is the most expensive, with prices 10% higher.

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

•June is the cheapest month to fly from London Heathrow Airport to Phnom Penh at £616 return.
•July (£956) and December (£910) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 55% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

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

Flights from London Heathrow Airport to Phnom Penh are cheapest 3 weeks before departure. Booking in this window typically costs about 15% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

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Key details for London Heathrow Airport to Phnom Penh flights

Low season

August

Cheapest flight

£274
Beat the crowds with an average 46% drop in traveller numbers.
The most popular month to fly with an average 186% increase in traveller numbers.
One-way flight from London Heathrow Airport to Phnom Penh

When to book flights from Heathrow to Phnom Penh

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

Your London Heathrow Airport to Phnom Penh 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 London Heathrow Airport to Phnom Penh?

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

    • Economy class
    • Premium Economy Class
    • Business Class
    • First Class

    Prices vary by airline.

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

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

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

    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 London Heathrow Airport to Phnom Penh flight?

    Return flights from London Heathrow Airport to Phnom Penh range from £605 to £905, with an average of £747 over the past 12 months. Anything below £605 counts as a good deal.

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

    Last-minute fares on this route (booked within two weeks of departure) run 2% above the £747 route average. Book 3 weeks before departure for the lowest fares.

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

    One-way fares from London Heathrow Airport to Phnom Penh are currently lower than usual. Average one-way flight prices are about £347, which is 27% below the typical average for this route.

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

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

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

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

    • Abu Dhabi Zayed Intl (AUH) – 30% of one-stop connections
    • Guangzhou Baiyun (CAN) – 16% of one-stop connections
    • Bangkok Suvarnabhumi (BKK) – 14% of one-stop connections
    • Kuala Lumpur Intl (KUL) – 9% of one-stop connections

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

    Yes. Flexible dates can save you up to 19% on flights from London Heathrow Airport to Phnom Penh. Saturday is the cheapest departure day at £673 return on average, while Wednesday is the most expensive at £829, a difference of £156.

    Cheaper weekend fares like these are typical of routes dominated by weekday business travel.

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

    Flying via Bangkok Suvarnabhumi (BKK) gives the shortest average 1-stop total travel time of 15h 50m, compared to 16h 04m via Ho Chi Minh City (SGN) and 17h 40m via Abu Dhabi Zayed Intl (AUH).

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

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

Your guide to booking London Heathrow Airport to Phnom Penh 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 Saturday departure and avoid flying on Wednesday. On this route, Saturday flights average £673, about £156 less than Wednesday fares (19% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 3 weeks before you fly. On this route, that window historically saves about 15% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your London Heathrow Airport to Phnom Penh trip for June. Fares historically average £616 return in that month – typically £341 less than the most expensive month, which is July (based on the last 12 months).

More options for your flight from Heathrow to Phnom Penh

Complete your trip to Phnom Penh with a hotel stay or car hire

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