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Cheap flights from Brighton to Siem Reap, Cambodia from £307

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/10. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SAI
8 Aug — 15 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Brighton to Siem Reap

Enter your travel dates to find the best prices.

Cheapest flights from Brighton to Siem Reap
Explore the most affordable flight options available from Brighton to Siem Reap. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 9 July 2026.

Wed 18/1106:00
LHR
-
SAI
2 stops29h 45m
Multiple Airlines
Wed 2/1209:55
SAI
-
LHR
2 stops18h 45m
Multiple Airlines
Deal found 8/7£576
Tue 1/1206:00
LHR
-
SAI
2 stops29h 45m
Austrian Airlines
Wed 16/1219:25
SAI
-
LHR
2 stops19h 55m
Austrian Airlines
Deal found 8/7£577
Wed 23/908:40
LHR
-
SAI
2 stops28h 15m
SWISS
Fri 2/1009:40
SAI
-
LHR
2 stops18h 05m
SWISS
Deal found 8/7£588
Tue 17/1109:05
LHR
-
SAI
2 stops26h 40m
Multiple Airlines
Wed 2/1209:55
SAI
-
LHR
2 stops18h 45m
Multiple Airlines
Deal found 8/7£593
Mon 14/918:40
LHR
-
SAI
2 stops33h 00m
SWISS
Thu 17/909:40
SAI
-
LHR
2 stops28h 15m
SWISS
Deal found 6/7£603
Mon 31/813:35
LHR
-
SAI
2 stops23h 20m
Multiple Airlines
Mon 7/909:40
SAI
-
LHR
2 stops28h 15m
Multiple Airlines
Deal found 9/7£607
Sat 5/1219:25
LHR
-
SAI
2 stops16h 20m
Multiple Airlines
Mon 14/1209:55
SAI
-
LHR
2 stops18h 45m
Multiple Airlines
Deal found 7/7£607
Tue 1/919:30
LHR
-
SAI
2 stops17h 25m
Multiple Airlines
Tue 8/909:40
SAI
-
LHR
2 stops18h 05m
Multiple Airlines
Deal found 7/7£608
Wed 2/909:00
LHR
-
SAI
2 stops27h 55m
Multiple Airlines
Wed 23/909:40
SAI
-
LHR
2 stops18h 05m
Multiple Airlines
Deal found 7/7£609
Sun 30/809:05
LGW
-
SAI
2 stops27h 50m
SWISS
Mon 7/909:40
SAI
-
LGW
2 stops28h 45m
SWISS
Deal found 9/7£609
Mon 31/808:40
LHR
-
SAI
2 stops28h 15m
SWISS
Tue 8/909:40
SAI
-
LHR
2 stops28h 15m
SWISS
Deal found 7/7£610
Sun 30/809:05
LGW
-
SAI
2 stops27h 50m
SWISS
Tue 8/909:40
SAI
-
LGW
2 stops28h 45m
SWISS
Deal found 7/7£610

Find flight deals from Brighton to Siem Reap

Keep the following information in mind while searching for Brighton to Siem Reap flight deals. Data was last updated 9 July 2026.

Round-trip from

£567

One-way from

£307

Popular in

December

Cheapest in

July

Average price

£626
SWISS
  • SWISS
  • 2/9-23/9
  • 4 total stops
  • 38h 35m total
  • Brighton to Siem Reap
Search Deals
1/10
  • 1/10
  • 2 total stops
  • 32h 30m total
  • Brighton to Siem Reap
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£92 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£29 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Brighton to 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, Cheapflights users made 858,174 searches. Data last updated 9 July 2026.
Use the filters below to find and compare flights from Brighton 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

Tue 22/9

19:30-18:55

2 stops17h 25m

Siem Reap–Angkor Intl

Thu 1/10

09:40-21:45

2 stops18h 05m

£593

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Sun 30/8

09:05-18:55

2 stops27h 50m

Siem Reap–Angkor Intl

Tue 8/9

09:40-08:25

2 stops28h 45m

£609

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Tue 1/9

09:25-18:55

2 stops27h 30m

Siem Reap–Angkor Intl

Mon 7/9

09:40-08:25

2 stops28h 45m

£609

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Mon 31/8

08:40-18:55

2 stops28h 15m

Siem Reap–Angkor Intl

Tue 8/9

09:40-07:55

2 stops28h 15m

£610

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Mon 31/8

09:25-18:55

2 stops27h 30m

Siem Reap–Angkor Intl

Mon 7/9

09:40-08:25

2 stops28h 45m

£610

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Sun 30/8

09:05-18:55

2 stops27h 50m

Siem Reap–Angkor Intl

Mon 7/9

09:40-08:25

2 stops28h 45m

£610

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Tue 1/12

10:30-21:00

2 stops51h 30m

Siem Reap–Angkor Intl

Thu 10/12

22:00-06:30

3 stops39h 30m

£621

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Thu 19/11

12:05-18:45

2 stops23h 40m

Siem Reap–Angkor Intl

Fri 4/12

09:55-21:40

2 stops18h 45m

£635

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Thu 19/11

12:05-18:45

2 stops23h 40m

Siem Reap–Angkor Intl

Wed 2/12

09:55-08:05

2 stops29h 10m

£635

LondonSiem Reap

LCY - SAI

LCYSAI

London City

Mon 31/8

13:10-18:55

2 stops23h 45m

Siem Reap–Angkor Intl

Tue 8/9

09:40-08:40

2 stops29h 00m

£650

Flights are sorted by cheapest return flights first.

Deals found on 8/7

Showing 1-10 of 60 resultsSorted by cheapest first
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6

Best time to book a flight from Brighton to Siem Reap

Have a flexible travel schedule? Discover the best time to fly to Siem Reap from Brighton with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Brighton to Siem Reap
No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Siem Reap

Get insights into the airlines that provide service to Siem Reap. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Siem Reap. Reviews last updated 9 July 2026.
Read reviews from past customers who have flown with Singapore Airlines,Thai Airways, andVietnam Airlines from Brighton to Siem Reap. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Singapore Airlines
8.2
Very Good
1,565 reviews
Check prices

Overall

8.2

Boarding

8.3

Comfort

8.0

Entertainment

8.0

Crew

8.6

Food

7.8

Reviews

1 / 20
10.0
Excellent

Wee Keng,May 2026

SIN - MNL

Was upgraded to Premium Economy seat as PPS member. SQ steward team prepared birthday cake for a colleague which I requested and didn’t follow up. Great service and a great way to fly.
Singapore Airlines
8.2
Very Good
1,565 reviews
Singapore Airlines
8.2
Very Good
1,565 reviews
Check prices

Overall

8.2

Boarding

8.3

Comfort

8.0

Entertainment

8.0

Crew

8.6

Food

7.8

Reviews

1 / 20
10.0
Excellent

Wee Keng,May 2026

SIN - MNL

Was upgraded to Premium Economy seat as PPS member. SQ steward team prepared birthday cake for a colleague which I requested and didn’t follow up. Great service and a great way to fly.
Thai Airways
7.9
Good
409 reviews
Singapore Airlines
8.2
Very Good
1,565 reviews
Check prices

Overall

8.2

Boarding

8.3

Comfort

8.0

Entertainment

8.0

Crew

8.6

Food

7.8

Reviews

1 / 20
10.0
Excellent

Wee Keng,May 2026

SIN - MNL

Was upgraded to Premium Economy seat as PPS member. SQ steward team prepared birthday cake for a colleague which I requested and didn’t follow up. Great service and a great way to fly.
Vietnam Airlines
7.7
Good
279 reviews
Singapore Airlines
8.2
Very Good
1,565 reviews
Check prices

Overall

8.2

Boarding

8.3

Comfort

8.0

Entertainment

8.0

Crew

8.6

Food

7.8

Reviews

1 / 20
10.0
Excellent

Wee Keng,May 2026

SIN - MNL

Was upgraded to Premium Economy seat as PPS member. SQ steward team prepared birthday cake for a colleague which I requested and didn’t follow up. Great service and a great way to fly.
British Airways
6.7
Okay
8,105 reviews
Singapore Airlines
8.2
Very Good
1,565 reviews
Check prices

Overall

8.2

Boarding

8.3

Comfort

8.0

Entertainment

8.0

Crew

8.6

Food

7.8

Reviews

1 / 20
10.0
Excellent

Wee Keng,May 2026

SIN - MNL

Was upgraded to Premium Economy seat as PPS member. SQ steward team prepared birthday cake for a colleague which I requested and didn’t follow up. Great service and a great way to fly.

Related info for your journey

Find useful and relevant information for your journey from Brighton to Siem Reap. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Siem Reap from Brighton?

    Most people fly into Siem Reap–Angkor Intl (SAI) if they book a flight to Siem Reap from Brighton. On average, Siem Reap–Angkor Intl has 0 inbound flights from Brighton per day from 4 airlines. Siem Reap–Angkor Intl is conveniently located just 24.7 mi from Siem Reap’s city center.

  • How long is the flight from Brighton to Siem Reap?

    Departing from Brighton to Siem Reap will take you 27h 50m. Airlines will cover a distance of 6102 mi. Both multi-stop and direct flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Brighton to Siem Reap one-way?

    The cheapet airlines for a one-way flight from Brighton to Siem Reap are Vietnam Airlines (£454), Singapore Airlines (£518), and Thai Airways (£561).

  • What are the most popular routes from Brighton to Siem Reap?

    The most popular route from Brighton to Siem Reap is London Heathrow - Siem Reap–Angkor Intl. You may also consider London Gatwick - Siem Reap–Angkor Intl or London City - Siem Reap–Angkor Intl.

  • Can I find deals for flights from Brighton to Siem Reap that include hotel bookings?

    Yes. In addition to deals on Brighton to Siem Reap flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Brighton to Siem Reap?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Brighton to Siem Reap.

  • Can I find deals for business class flights from Brighton to Siem Reap?

    Yes. Cheapflights offers flight deals from Brighton to Siem Reap by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top 4 airlines flying from Brighton to Siem Reap

Discover the top 4 airlines that operate flights from Brighton to Siem Reap. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 9 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Austrian AirlinesCheapest£542Average£688FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
Vietnam AirlinesCheapest£620Average£818FlexibilityNo cancel feeOn-time81%
Search Vietnam Airlines flights
Singapore AirlinesCheapest£667Average£926FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights
Thai AirwaysCheapest£826Average£961FlexibilityNo cancel feeOn-time77%
Search Thai Airways flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Brighton to Siem Reap?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Siem Reap from Brighton today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Brighton to Siem Reap?

Cheapflights helps you find that perfect flight to Siem Reap from Brighton by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Brighton to Siem Reap with no change fees?

Certainly. Search results for flights to Siem Reap from Brighton shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Brighton to Siem Reap become cheaper?

Yes! Start tracking prices for Brighton to Siem Reap flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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