LON - KTI

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

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Everything you should know

Cheapest return flight
£408
Typical prices: £580-£878
Air China
Thu 22/2Thu 1/3
LHR - KTI • 1 stop
Cheapest one-way flight
£271
Typical prices: £371-£579
Shenzhen Airlines
Fri 9/11
LHR - KTI • 1 stop
Direct flights
Not available
There are currently no direct flights between London and Phnom Penh. You'll need to take a connecting flight to reach the destination.
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Insights
Top routes
LGW - KTI
Cheapest • 14% average savings
LHR - KTI
Most popular
Insights
Insights
When to book
10 weeks
in advance
Our data shows that travellers who book at least 10 weeks in advance save around 26% compared to booking last minute.
Insights
Insights
When to travel
November
Cheapest • 24% price drop
December
Most popular
Good to know
+1
Good to know
+1
Top stopover airports
Xiamen Gaoqi Intl (XMN)
Cheapest • Avg £414 (return)
Bangkok Suvarnabhumi (BKK)
Shortest trip • 15h 49m (one-way)
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Insights
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We hope you enjoy your trip to Phnom Penh!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from London to Phnom Penh (LON-KTI)

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

Recent return flight deals from London to Phnom Penh

Sat, 5 Dec - Mon, 14 Dec
Air China Logo
17:45 - 23:10LHR  London Heathrow-KTI Phnom Penh Techo Intl
22h 25m1 stop Beijing Capital
Air China Logo
00:25 - 15:55KTI  Phnom Penh Techo Intl-LHR London Heathrow
22h 30m1 stop Beijing Capital
£408Air China
Mon, 22 Feb - Mon, 1 Mar
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
£408Air China
Tue, 10 Nov - Sun, 15 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
Wed, 28 Oct - Mon, 2 Nov
Shenzhen Airlines Logo
21:10 - 10:40LHR  London Heathrow-KTI Phnom Penh Techo Intl
30h 30m1 stop Shenzhen
Shenzhen Airlines Logo
11:40 - 20:30KTI  Phnom Penh Techo Intl-LHR London Heathrow
39h 50m1 stop Shenzhen
£437Shenzhen Airlines
Thu, 12 Nov - Tue, 17 Nov
Multiple Airlines Logo
22:30 - 10:40LHR  London Heathrow-KTI Phnom Penh Techo Intl
29h 10m1 stop Shenzhen
Multiple Airlines Logo
08:00 - 18:35KTI  Phnom Penh Techo Intl-LHR London Heathrow
17h 35m1 stop Guangzhou Baiyun
£456Multiple Airlines
Fri, 6 Nov - Wed, 11 Nov
Multiple Airlines Logo
21:10 - 10:40LHR  London Heathrow-KTI Phnom Penh Techo Intl
30h 30m1 stop Shenzhen
Multiple Airlines Logo
08:00 - 18:35KTI  Phnom Penh Techo Intl-LHR London Heathrow
17h 35m1 stop Guangzhou Baiyun
£456Multiple Airlines
Thu, 29 Oct - Wed, 4 Nov
China Southern Logo
09:50 - 10:50LGW  London Gatwick-KTI Phnom Penh Techo Intl
18h 00m1 stop Guangzhou Baiyun
China Southern Logo
16:10 - 06:30KTI  Phnom Penh Techo Intl-LGW London Gatwick
21h 20m1 stop Guangzhou Baiyun
£469China Southern
Wed, 11 Nov - Tue, 17 Nov
China Southern Logo
09:50 - 10:50LGW  London Gatwick-KTI Phnom Penh Techo Intl
18h 00m1 stop Guangzhou Baiyun
China Southern Logo
16:10 - 06:30KTI  Phnom Penh Techo Intl-LGW London Gatwick
21h 20m1 stop Guangzhou Baiyun
£471China Southern
Mon, 22 Feb - Mon, 8 Mar
China Eastern Logo
17:00 - 11:35LGW  London Gatwick-KTI Phnom Penh Techo Intl
35h 35m2 stops Shanghai Pu Dong Kunming Changshui
China Eastern Logo
12:40 - 06:30KTI  Phnom Penh Techo Intl-LGW London Gatwick
24h 50m2 stops Kunming Changshui Shanghai Pu Dong
£570China Eastern
Mon, 22 Feb - Mon, 8 Mar
China Eastern Logo
17:00 - 00:15LGW  London Gatwick-KTI Phnom Penh Techo Intl
24h 15m1 stop Shanghai Pu Dong
China Eastern Logo
12:40 - 06:30KTI  Phnom Penh Techo Intl-LGW London Gatwick
24h 50m2 stops Kunming Changshui Shanghai Pu Dong
£570China Eastern
Booking Insights

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

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

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

Return flights from London to Phnom Penh start at £408. Prices are below average for this route right now, with typical return fares ranging from £580 to £878. The lowest price found in the past 5 days was £408 on Air China.

What is the cheapest London to Phnom Penh flight route?

London Gatwick Airport (LGW) to Phnom Penh (KTI) is the cheapest London to Phnom Penh route, averaging £714 return. Other London to Phnom Penh routes average £866, based on KAYAK data over the past 12 months.

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

Saturday is the cheapest day of the week to fly from London to Phnom Penh and is 7% cheaper than the average day. Sunday is the most expensive day with flight prices 10% higher than average. Based on deals found by KAYAK users in the last 12 months.

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

•November is the cheapest month to fly from London to Phnom Penh at £543 return.
•July (£900) and December (£862) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 65% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are prices from London to Phnom Penh the cheapest?

Flights from London to Phnom Penh are cheapest 10 weeks before departure. Booking in this window typically costs about 26% 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 to Phnom Penh flights

Low season

August

Cheapest flight

£271
Best time to beat the crowds but there is an average 18% increase in price.
Most popular time to fly (20% more expensive on average)
Flights from London Heathrow Airport to Phnom Penh

When to book flights from London to Phnom Penh

Are your dates flexible? Find out the best times to travel from London 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 to Phnom Penh flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines, and booking questions.

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

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

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

    Prices vary by airline.

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

    A direct flight from London to Phnom Penh takes 0h 00m, covering 6,232 miles.

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

    Return flights from London to Phnom Penh range from £580 to £878, with an average of £716 over the past 12 months. Anything below £580 counts as a good deal.

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

    Last-minute fares on this route (booked within 2 weeks of departure) run 4% above the route average of £716. Book 10 weeks before departure for the lowest fares.

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

    One-way fares from London to Phnom Penh are currently lower than usual. Average one-way flight prices are about £309, which is 33% below the typical average for this route.

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

    Flights from London to Phnom Penh may depart from several airports in London area, including London City (LCY), London Gatwick (LGW), London Heathrow (LHR), London Luton (LTN), London Southend (SEN) and London Stansted (STN). Flights usually arrive at Phnom Penh Techo Intl (KTI).

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

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

    • Abu Dhabi Zayed Intl (AUH) – 26% of one-stop connections
    • Guangzhou Baiyun (CAN) – 18% of one-stop connections
    • Singapore Changi (SIN) – 13% of one-stop connections
    • Bangkok Suvarnabhumi (BKK) – 12% of one-stop connections

    Abu Dhabi Zayed Intl (AUH) handles the largest share of one-stop connections on this route.

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

    On the London to Phnom Penh route, being flexible with your departure day can save you up to 16%. Saturday is the cheapest day at £672 return on average, while Sunday is the most expensive at £792 – a £121 difference. 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 to Phnom Penh?

    Flying via Bangkok Suvarnabhumi (BKK) gives the shortest average 1-stop total travel time of 15h 49m, compared to 16h 04m via Ho Chi Minh City (SGN) and 17h 40m via Xiamen Gaoqi Intl (XMN).

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

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

Your guide to booking London 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 instead of Sunday. On this route, Saturday flights average £672 – about £121 less than Sunday (15% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 10 weeks before you fly. On this route, that window historically saves about 26% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your London to Phnom Penh trip for November. Fares historically average £543 return in that month – typically £357 less than the most expensive month, which is July (based on the last 12 months).

More options for your flight from London to Phnom Penh

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

Car hire in Phnom Penh
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