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Cheap flights from the United Kingdom to Siem Reap from £308

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from the United Kingdom to Siem Reap departing on 1/10. 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

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Find the cheapest flights from the United Kingdom to Siem Reap

Recent return flight deals from the United Kingdom to Siem Reap

Enter your travel dates to find the best prices.
Multiple Airlines Logo
16:25 - 18:55
LHR
-
SAI
20h 30m
2 stops
Multiple Airlines Logo
09:40 - 21:45
SAI
-
LHR
18h 05m
2 stops
£567Multiple Airlines
Wed, 2 Sep - Wed, 23 Sep
SWISS Logo
09:25 - 18:55
LGW
-
SAI
27h 30m
2 stops
SWISS Logo
09:40 - 08:25
SAI
-
LGW
28h 45m
2 stops
£594SWISS
Wed, 2 Sep - Wed, 23 Sep
SWISS Logo
18:40 - 09:40
LHR
-
SAI
33h 00m
2 stops
SWISS Logo
09:40 - 07:55
SAI
-
LHR
28h 15m
2 stops
£603SWISS
Mon, 14 Sep - Thu, 17 Sep
Multiple Airlines Logo
09:05 - 18:55
LHR
-
SAI
27h 50m
2 stops
Multiple Airlines Logo
09:40 - 07:55
SAI
-
LHR
28h 15m
2 stops
£615Multiple Airlines
Tue, 1 Sep - Mon, 7 Sep
Emirates Logo
14:55 - 21:30
STN
-
SAI
24h 35m
2 stops
Emirates Logo
12:55 - 18:45
SAI
-
STN
35h 50m
2 stops
£748Emirates
Wed, 2 Sep - Wed, 23 Sep
Emirates Logo
14:35 - 21:30
LGW
-
SAI
24h 55m
2 stops
Emirates Logo
12:55 - 07:20
SAI
-
LGW
24h 25m
2 stops
£772Emirates
Wed, 19 Aug - Wed, 16 Sep
Singapore Airlines Logo
10:05 - 15:55
MAN
-
SAI
22h 50m
1 stop
Singapore Airlines Logo
10:45 - 08:35
SAI
-
MAN
28h 50m
1 stop
£855Singapore Airlines
Wed, 25 Nov - Wed, 9 Dec
Etihad Airways Logo
08:25 - 12:40
MAN
-
SAI
45h 15m
2 stops
Etihad Airways Logo
19:25 - 17:55
SAI
-
MAN
53h 30m
2 stops
£858Etihad Airways
Wed, 4 Nov - Wed, 11 Nov
Austrian Airlines Logo
17:40 - 18:45
MAN
-
SAI
18h 05m
3 stops
Austrian Airlines Logo
09:55 - 17:00
SAI
-
MAN
38h 05m
3 stops
£867Austrian Airlines
Wed, 25 Nov - Wed, 9 Dec
Etihad Airways Logo
19:55 - 12:40
MAN
-
SAI
33h 45m
2 stops
Etihad Airways Logo
19:25 - 17:55
SAI
-
MAN
53h 30m
2 stops
£870Etihad Airways
Wed, 4 Nov - Wed, 11 Nov

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SWISS flights from United Kingdom to Region of Siem Reap

Our best SWISS deals on United Kingdom to Region of Siem Reap flight tickets
SWISS
2 Sept
LGW09:25London Gatwick
27h 30m
2 stops
SAI18:55Siem Reap–Angkor Intl
23 Sept
SAI09:40Siem Reap–Angkor Intl
28h 45m
2 stops
LGW08:25London Gatwick
£594
SWISS
14 Sept
LHR18:40London Heathrow
33h 00m
2 stops
SAI09:40Siem Reap–Angkor Intl
17 Sept
SAI09:40Siem Reap–Angkor Intl
28h 15m
2 stops
LHR07:55London Heathrow
£603
SWISS
16 Nov
LHR09:00London Heathrow
26h 45m
2 stops
SAI18:45Siem Reap–Angkor Intl
1 Dec
SAI09:55Siem Reap–Angkor Intl
18h 45m
2 stops
LHR21:40London Heathrow
£650

China Eastern flights from United Kingdom to Region of Siem Reap

Our best China Eastern deals on United Kingdom to Region of Siem Reap flight tickets
China Eastern
12 Nov
LGW10:30London Gatwick
51h 30m
2 stops
SAI21:00Siem Reap–Angkor Intl
19 Nov
SAI22:00Siem Reap–Angkor Intl
47h 00m
2 stops
LGW14:00London Gatwick
£672
China Eastern
10 Nov
LHR21:00London Heathrow
41h 00m
3 stops
SAI21:00Siem Reap–Angkor Intl
3 Dec
SAI22:00Siem Reap–Angkor Intl
50h 30m
2 stops
LHR17:30London Heathrow
£698
China Eastern
10 Nov
LHR21:00London Heathrow
41h 00m
2 stops
SAI21:00Siem Reap–Angkor Intl
5 Dec
SAI22:00Siem Reap–Angkor Intl
50h 30m
3 stops
LHR17:30London Heathrow
£701

momondo Fare Finder

 
Customise your flight search to find flights from United Kingdom to Region of Siem Reap 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 6 July 2026.
Use the filters below to find and compare flights from the United Kingdom to Siem Reap that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Wed 2/9

16:25-18:55

2 stops20h 30m

Siem Reap–Angkor Intl

Wed 23/9

09:40-21:45

2 stops18h 05m

£567

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Wed 2/9

09:25-18:55

2 stops27h 30m

Siem Reap–Angkor Intl

Wed 23/9

09:40-08:25

2 stops28h 45m

£594

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Mon 14/9

18:40-09:40

2 stops33h 00m

Siem Reap–Angkor Intl

Thu 17/9

09:40-07:55

2 stops28h 15m

£603

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Tue 1/9

09:05-18:55

2 stops27h 50m

Siem Reap–Angkor Intl

Mon 7/9

09:40-07:55

2 stops28h 15m

£615

LondonSiem Reap

STN - SAI

STNSAI

London Stansted

Wed 2/9

14:55-21:30

2 stops24h 35m

Siem Reap–Angkor Intl

Wed 23/9

12:55-18:45

2 stops35h 50m

£748

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Wed 19/8

14:35-21:30

2 stops24h 55m

Siem Reap–Angkor Intl

Wed 16/9

12:55-07:20

2 stops24h 25m

£772

ManchesterSiem Reap

MAN - SAI

MANSAI

Manchester

Wed 25/11

10:05-15:55

1 stop22h 50m

Siem Reap–Angkor Intl

Wed 9/12

10:45-08:35

1 stop28h 50m

£855

ManchesterSiem Reap

MAN - SAI

MANSAI

Manchester

Wed 4/11

08:25-12:40

2 stops45h 15m

Siem Reap–Angkor Intl

Wed 11/11

19:25-17:55

2 stops53h 30m

£858

ManchesterSiem Reap

MAN - SAI

MANSAI

Manchester

Wed 25/11

17:40-18:45

3 stops18h 05m

Siem Reap–Angkor Intl

Wed 9/12

09:55-17:00

3 stops38h 05m

£867

ManchesterSiem Reap

MAN - SAI

MANSAI

Manchester

Wed 4/11

19:55-12:40

2 stops33h 45m

Siem Reap–Angkor Intl

Wed 11/11

19:25-17:55

2 stops53h 30m

£870

Flights are sorted by cheapest return flights first.

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

How to get the cheapest flight ticket from United Kingdom to Region of Siem Reap

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 Region of Siem Reap?

If you’re not able to fly to Region of Siem Reap in December, then November is your next best option. Flight prices from United Kingdom to Region of Siem Reap during November average around £188.

Can stopping save me money on United Kingdom to Region of Siem Reap flights?

You could potentially save up to 53% on your flight if you consider stops on a United Kingdom to Region of Siem Reap flight.

Cheap United Kingdom to Region of Siem Reap flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from United Kingdom to Region of Siem Reap

Fastest flight time

18h 25m

Direct flights

None
The fastest flight from United Kingdom to Region of Siem Reap takes 18h 25m
There are no direct flights from United Kingdom to Region of Siem Reap. There are no popular flight routes from United Kingdom to Region of Siem Reap.
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Frequently asked questions about flying from the United Kingdom to Siem Reap

  • When did momondo last update prices for flights from United Kingdom to Siem Reap?

    Prices for flights from United Kingdom to Siem Reap were last updated today.

  • How many operators does momondo search for flights from United Kingdom to Siem Reap?

  • How old do you have to be to fly from United Kingdom to Siem Reap?

    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 United Kingdom to Siem Reap.

  • What documentation or ID do you need to fly to Siem Reap?

    The travel and health documents required for your trip to Siem Reap can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Siem Reap. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from United Kingdom to Region of Siem Reap

Compare and see reviews for airlines that fly from United Kingdom to Region of Siem Reap with momondo
Airline
Rating
Free Cancellation
Price
Austrian AirlinesPriceFrom £542Free CancellationRating
7.6
939 reviews
Search Austrian Airlines flights
Etihad AirwaysPriceFrom £550Free CancellationRating
7.3
1,476 reviews
Search Etihad Airways flights
Vietnam AirlinesPriceFrom £620Free CancellationRating
7.7
279 reviews
Search Vietnam Airlines flights
Singapore AirlinesPriceFrom £668Free CancellationRating
8.2
1,563 reviews
Search Singapore Airlines flights
Thai AirwaysPriceFrom £827Free CancellationRating
7.9
409 reviews
Search Thai Airways flights
EmiratesPriceFrom £857Free CancellationRating
8.1
3,606 reviews
Search Emirates flights

Why use momondo?

Why should I use momondo to find a flight deal from United Kingdom to Siem Reap?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Siem Reap from United Kingdom.

Can I find flights from United Kingdom to Siem Reap with flexible booking policies on momondo?

Yes. All flights to Siem Reap from United Kingdom on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from United Kingdom to Siem Reap?

momondo helps you find the best flight between United Kingdom and Siem Reap by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from United Kingdom to Siem Reap right now. Can momondo alert me if prices change?

Yes. momondo can track prices for United Kingdom to Siem Reap flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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Popular Cities in Siem Reap

Popular flights according to clicks in the last 7 days on momondo
Flights to Siem Reapfrom £653