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Cheap flights from London Heathrow Airport to Cambodia from £352

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 Heathrow Airport to Cambodia departing on 4/9. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from London Heathrow Airport to Cambodia

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
12:10 - 18:55
LHR
-
SAI
24h 45m
2 stops
Multiple Airlines Logo
19:35 - 08:15
SAI
-
LHR
18h 40m
2 stops
£593Multiple Airlines
Wed, 2 Sep - Wed, 30 Sep
SWISS Logo
08:40 - 18:55
LHR
-
SAI
28h 15m
2 stops
SWISS Logo
09:40 - 07:55
SAI
-
LHR
28h 15m
2 stops
£599SWISS
Mon, 14 Sep - Sun, 27 Sep
Austrian Airlines Logo
06:00 - 18:55
LHR
-
SAI
30h 55m
2 stops
Austrian Airlines Logo
19:35 - 08:20
SAI
-
LHR
18h 45m
2 stops
£639Austrian Airlines
Wed, 30 Sep - Wed, 21 Oct
Austrian Airlines Logo
09:05 - 18:45
LHR
-
SAI
26h 40m
2 stops
Austrian Airlines Logo
09:55 - 21:40
SAI
-
LHR
18h 45m
2 stops
£677Austrian Airlines
Tue, 10 Nov - Mon, 23 Nov
Singapore Airlines Logo
10:40 - 09:50
LHR
-
SAI
16h 10m
1 stop
Singapore Airlines Logo
16:45 - 07:40
SAI
-
LHR
21h 55m
1 stop
£756Singapore Airlines
Wed, 18 Nov - Wed, 2 Dec
Singapore Airlines Logo
10:40 - 09:50
LHR
-
SAI
16h 10m
1 stop
Singapore Airlines Logo
16:45 - 07:40
SAI
-
LHR
21h 55m
1 stop
£756Singapore Airlines
Mon, 23 Nov - Wed, 2 Dec
Vietnam Airlines Logo
11:00 - 16:55
LHR
-
SAI
22h 55m
1 stop
Vietnam Airlines Logo
18:40 - 07:15
SAI
-
LHR
19h 35m
1 stop
£766Vietnam Airlines
Wed, 18 Nov - Mon, 14 Dec
Vietnam Airlines Logo
18:55 - 17:10
LHR
-
SAI
16h 15m
1 stop
Vietnam Airlines Logo
18:05 - 17:50
SAI
-
LHR
29h 45m
1 stop
£791Vietnam Airlines
Wed, 2 Sep - Sat, 3 Oct
Thai Airways Logo
11:50 - 08:45
LHR
-
SAI
13h 55m
1 stop
Thai Airways Logo
09:50 - 19:35
SAI
-
LHR
16h 45m
1 stop
£959Thai Airways
Fri, 6 Nov - Fri, 20 Nov
Thai Airways Logo
11:50 - 08:45
LHR
-
SAI
13h 55m
1 stop
Thai Airways Logo
09:50 - 19:35
SAI
-
LHR
16h 45m
1 stop
£1,013Thai Airways
Fri, 6 Nov - Mon, 23 Nov

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Lufthansa flights from London Heathrow Airport to Cambodia

Our best Lufthansa deals on London Heathrow Airport to Cambodia flight tickets
Lufthansa
30 Sept
LHR07:25London Heathrow
29h 30m
2 stops
SAI18:55Siem Reap–Angkor Intl
28 Oct
SAI19:25Siem Reap–Angkor Intl
19h 40m
2 stops
LHR08:05London Heathrow
£708
Lufthansa
30 Sept
LHR07:25London Heathrow
29h 30m
2 stops
SAI18:55Siem Reap–Angkor Intl
28 Oct
SAI19:25Siem Reap–Angkor Intl
19h 40m
2 stops
LHR08:05London Heathrow
£710

Austrian Airlines flights from London Heathrow Airport to Cambodia

Our best Austrian Airlines deals on London Heathrow Airport to Cambodia flight tickets
Austrian Airlines
30 Sept
LHR06:00London Heathrow
30h 55m
2 stops
SAI18:55Siem Reap–Angkor Intl
21 Oct
SAI19:35Siem Reap–Angkor Intl
18h 45m
2 stops
LHR08:20London Heathrow
£639
Austrian Airlines
10 Nov
LHR09:05London Heathrow
26h 40m
2 stops
SAI18:45Siem Reap–Angkor Intl
23 Nov
SAI09:55Siem Reap–Angkor Intl
18h 45m
2 stops
LHR21:40London Heathrow
£677

momondo Fare Finder

 
Customise your flight search to find flights from London Heathrow Airport to Cambodia 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 279,928 searches. Data last updated 30 July 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Cambodia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Wed 2/9

12:10-18:55

2 stops24h 45m

Siem Reap–Angkor Intl

Wed 30/9

19:35-08:15

2 stops18h 40m

£593

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Mon 14/9

08:40-18:55

2 stops28h 15m

Siem Reap–Angkor Intl

Sun 27/9

09:40-07:55

2 stops28h 15m

£599

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Wed 30/9

06:00-18:55

2 stops30h 55m

Siem Reap–Angkor Intl

Wed 21/10

19:35-08:20

2 stops18h 45m

£639

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Tue 10/11

09:05-18:45

2 stops26h 40m

Siem Reap–Angkor Intl

Mon 23/11

09:55-21:40

2 stops18h 45m

£677

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Wed 18/11

10:40-09:50

1 stop16h 10m

Siem Reap–Angkor Intl

Wed 2/12

16:45-07:40

1 stop21h 55m

£756

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Mon 23/11

10:40-09:50

1 stop16h 10m

Siem Reap–Angkor Intl

Wed 2/12

16:45-07:40

1 stop21h 55m

£756

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Wed 18/11

11:00-16:55

1 stop22h 55m

Siem Reap–Angkor Intl

Mon 14/12

18:40-07:15

1 stop19h 35m

£766

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Wed 2/9

18:55-17:10

1 stop16h 15m

Siem Reap–Angkor Intl

Sat 3/10

18:05-17:50

1 stop29h 45m

£791
Fastest return journey

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Fri 6/11

11:50-08:45

1 stop13h 55m

Siem Reap–Angkor Intl

Fri 20/11

09:50-19:35

1 stop16h 45m

£959

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Fri 6/11

11:50-08:45

1 stop13h 55m

Siem Reap–Angkor Intl

Mon 23/11

09:50-19:35

1 stop16h 45m

£1,013

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Cambodia from

How to get the cheapest flight ticket from London Heathrow Airport to Cambodia

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 Cambodia?

In general, November is the cheapest month to fly from London Heathrow Airport to Cambodia. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £587. If you aren’t able to travel during the month of November, then book flights to Cambodia from London Heathrow Airport during June instead. Flights to Cambodia in June, while not as cheap as those in November, still average around £624.

How far in advance should I book a flight from London Heathrow Airport to Cambodia?

You are more likely to see cheaper flights to Cambodia from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Cambodia for around £729 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Cambodia from London Heathrow Airport for as low as £551 on momondo.

Can stopping save me money on London Heathrow Airport to Cambodia flights?

You could potentially save up to 27% on your flight if you consider stops on a London Heathrow Airport to Cambodia flight.

Cheap London Heathrow Airport to Cambodia flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Heathrow Airport to Cambodia

Fastest flight time

16h 15m

Direct flights

None
The fastest flight from London Heathrow Airport to Cambodia takes 16h 15m
There are no direct flights from London Heathrow Airport to Cambodia. There are no popular flight routes from London Heathrow Airport to Cambodia.
Search flight deals

Frequently asked questions about flying from London Heathrow Airport to Cambodia

  • When did momondo last update prices for flights from London Heathrow Airport to Cambodia?

    Prices for flights from London Heathrow Airport to Cambodia refresh daily.

  • How many operators does momondo search for flights from London Heathrow Airport to Cambodia?

  • How old do you have to be to fly from London Heathrow Airport to Cambodia?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from London Heathrow Airport to Cambodia.

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

    The required travel and health documents for your Cambodia trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Cambodia. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from London Heathrow Airport to Cambodia

Compare and see reviews for airlines that fly from London Heathrow Airport to Cambodia with momondo
Airline
Rating
Free Cancellation
Price
Air ChinaPriceFrom £270Free CancellationRating
7.4
159 reviews
Search Air China flights
China SouthernPriceFrom £473Free CancellationRating
7.4
166 reviews
Search China Southern flights
Shenzhen AirlinesPriceFrom £488Free CancellationRating
7.9
26 reviews
Search Shenzhen Airlines flights
Etihad AirwaysPriceFrom £514Free CancellationRating
7.3
1,497 reviews
Search Etihad Airways flights
Austrian AirlinesPriceFrom £544Free CancellationRating
7.6
950 reviews
Search Austrian Airlines flights
China EasternPriceFrom £583Free CancellationRating
7.3
229 reviews
Search China Eastern flights
Malaysia AirlinesPriceFrom £593Free CancellationRating
7.3
314 reviews
Search Malaysia Airlines flights
Singapore AirlinesPriceFrom £617Free CancellationRating
8.2
1,584 reviews
Search Singapore Airlines flights
Vietnam AirlinesPriceFrom £622Free CancellationRating
7.7
280 reviews
Search Vietnam Airlines flights
Cathay PacificPriceFrom £712Free CancellationRating
7.6
1,433 reviews
Search Cathay Pacific flights

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from London to Cambodia . Millions of users trust and use momondo every year so you are in good hands.

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

Yes. momondo allows you to filter the results for London to Cambodia flights to just show those with flexible booking policies.

How can momondo help me find flights from London to Cambodia?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Cambodia from London.

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

Of course. momondo tracks the price of London to Cambodia flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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