Cheap flights from Brighton to Siem Reap, Cambodia from £351

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 26/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SAI
12 May — 19 May1
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 12 April 2026.

Tue 10/1121:00
LHR
-
SAI
3 stops41h 00m
China Eastern
Thu 3/1222:00
SAI
-
LHR
2 stops50h 30m
China Eastern
Deal found 7/4£642
Thu 5/1121:00
LHR
-
SAI
2 stops41h 00m
China Eastern
Sat 21/1122:00
SAI
-
LHR
2 stops50h 30m
China Eastern
Deal found 9/4£650
Mon 1/615:15
LTN
-
SAI
3 stops24h 15m
Multiple Airlines
Tue 23/612:55
SAI
-
LTN
3 stops37h 00m
Multiple Airlines
Deal found 10/4£688
Tue 10/1121:00
LHR
-
SAI
3 stops41h 00m
China Eastern
Sat 5/1222:00
SAI
-
LHR
2 stops50h 30m
China Eastern
Deal found 7/4£692
Wed 4/1121:00
LHR
-
SAI
2 stops29h 10m
Multiple Airlines
Sat 21/1122:00
SAI
-
LHR
3 stops50h 30m
Multiple Airlines
Deal found 9/4£697
Tue 28/421:05
STN
-
SAI
2 stops42h 25m
Emirates
Tue 19/523:50
SAI
-
STN
2 stops24h 55m
Emirates
Deal found 7/4£705
Sun 26/421:45
LGW
-
SAI
2 stops41h 45m
Emirates
Tue 19/523:50
SAI
-
LGW
2 stops25h 55m
Emirates
Deal found 7/4£712
Sun 1/1121:00
LHR
-
SAI
2 stops41h 00m
Multiple Airlines
Sun 29/1119:10
SAI
-
LHR
2 stops29h 20m
Multiple Airlines
Deal found 9/4£715
Mon 1/609:15
LGW
-
SAI
2 stops24h 55m
Multiple Airlines
Tue 23/616:55
SAI
-
LGW
2 stops50h 30m
Multiple Airlines
Deal found 10/4£716
Fri 1/514:55
STN
-
SAI
2 stops24h 35m
Emirates
Tue 19/523:50
SAI
-
STN
2 stops24h 55m
Emirates
Deal found 7/4£725
Mon 1/614:55
STN
-
SAI
2 stops24h 35m
Emirates
Tue 23/623:50
SAI
-
STN
2 stops24h 55m
Emirates
Deal found 10/4£726
Fri 1/514:35
LGW
-
SAI
2 stops24h 55m
Emirates
Tue 19/523:50
SAI
-
LGW
2 stops27h 40m
Emirates
Deal found 7/4£732

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 12 April 2026.

Round-trip from

£688

One-way from

£351

Popular in

December

Cheapest in

September

Average price

£798
1/6-23/6
  • 1/6-23/6
  • 6 total stops
  • 61h 15m total
  • Brighton to Siem Reap
26/5
  • 26/5
  • 3 total stops
  • 35h 00m total
  • Brighton to Siem Reap
Highest demand for flights based on searches. 7% potential increase in price (£53 potential increase over avg. return price).
Cheapest flight prices on average. 4% potential price decrease (£24 potential savings vs. average return price).
Average for round-trip flights in April 2026

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 12 April 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

LondonSiem Reap

LTN - SAI

LTNSAI

London Luton

Mon 1/6

15:15-21:30

3 stops24h 15m

Siem Reap–Angkor Intl

Tue 23/6

12:55-19:55

3 stops37h 00m

£688

LondonSiem Reap

STN - SAI

STNSAI

London Stansted

Tue 28/4

21:05-21:30

2 stops42h 25m

Siem Reap–Angkor Intl

Tue 19/5

23:50-18:45

2 stops24h 55m

£705

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Tue 28/4

21:45-21:30

2 stops41h 45m

Siem Reap–Angkor Intl

Tue 19/5

23:50-21:30

2 stops27h 40m

£712

LondonSiem Reap

STN - SAI

STNSAI

London Stansted

Tue 28/4

21:05-21:30

2 stops42h 25m

Siem Reap–Angkor Intl

Sat 23/5

23:50-18:45

2 stops24h 55m

£735

LondonSiem Reap

STN - SAI

STNSAI

London Stansted

Thu 30/4

21:05-21:30

2 stops42h 25m

Siem Reap–Angkor Intl

Sat 23/5

23:50-18:45

2 stops24h 55m

£735

LondonSiem Reap

STN - SAI

STNSAI

London Stansted

Tue 28/4

21:05-21:30

2 stops42h 25m

Siem Reap–Angkor Intl

Thu 21/5

23:50-18:45

2 stops24h 55m

£735
Fastest return journey

LondonSiem Reap

STN - SAI

STNSAI

London Stansted

Mon 27/4

21:05-21:30

2 stops18h 25m

Siem Reap–Angkor Intl

Tue 19/5

23:50-18:45

2 stops24h 55m

£737

LondonSiem Reap

STN - SAI

STNSAI

London Stansted

Sun 26/4

21:05-12:20

2 stops33h 15m

Siem Reap–Angkor Intl

Tue 19/5

23:50-18:45

2 stops24h 55m

£738

LondonSiem Reap

STN - SAI

STNSAI

London Stansted

Sun 3/5

21:05-21:30

2 stops42h 25m

Siem Reap–Angkor Intl

Mon 18/5

13:05-18:45

2 stops35h 40m

£738

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Wed 29/4

14:35-21:30

2 stops24h 55m

Siem Reap–Angkor Intl

Thu 21/5

23:50-21:30

2 stops27h 40m

£741

Flights are sorted by cheapest return flights first.

Deals found on 11/4

Showing 1-10 of 60 resultsSorted by cheapest first
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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

What is the cheapest month to book a flight from Brighton to Siem Reap?

Currently, November is the cheapest month in which you can book a flight from Brighton to Siem Reap (average of £554). Flying from Brighton to Siem Reap in August is currently the most expensive (average of £1,039). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost for a return flight from Brighton to Siem Reap?

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 12 April 2026.
Read reviews from past customers who have flown with Singapore Airlines,Emirates, andThai Airways 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.

Food

7.8

Overall

8.2

Entertainment

8.0

Boarding

8.3

Crew

8.6

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.

Food

7.8

Overall

8.2

Entertainment

8.0

Boarding

8.3

Crew

8.6

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.

Food

7.8

Overall

8.2

Entertainment

8.0

Boarding

8.3

Crew

8.6

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.

Food

7.8

Overall

8.2

Entertainment

8.0

Boarding

8.3

Crew

8.6

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.

Food

7.8

Overall

8.2

Entertainment

8.0

Boarding

8.3

Crew

8.6

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.

Food

7.8

Overall

8.2

Entertainment

8.0

Boarding

8.3

Crew

8.6

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.

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 5 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 6084 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 (£451), Singapore Airlines (£514), and Thai Airways (£557).

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

  • 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.

  • What is the cheapest month to book a flight from Brighton to Siem Reap?

    Currently, November is the cheapest month in which you can book a flight from Brighton to Siem Reap (average of £554). Flying from Brighton to Siem Reap in August is currently the most expensive (average of £1,039). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 5 airlines flying from Brighton to Siem Reap

Discover the top 5 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 12 April 2026.
AirlineCheapestAverageFlexibilityOn-time
Austrian AirlinesCheapest£538Average£686FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
LufthansaCheapest£597Average£766FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Vietnam AirlinesCheapest£618Average£803FlexibilityNo cancel feeOn-time81%
Search Vietnam Airlines flights
Singapore AirlinesCheapest£663Average£906FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights
Thai AirwaysCheapest£861Average£934FlexibilityNo cancel feeOn-time77%
Search Thai Airways flights

Fly with Cheapflights

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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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