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Cheap flights from London Luton Airport to Siem Reap from £362

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 Luton Airport to Siem Reap departing on 1/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags
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Find the cheapest flights from London Luton Airport to Siem Reap

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
07:00 - 09:00
LTN
-
SAI
20h 00m
2 stops
Multiple Airlines Logo
19:05 - 21:50
SAI
-
LTN
32h 45m
3 stops
£977Multiple Airlines
Thu, 18 Jun - Thu, 25 Jun

momondo Fare Finder

 
Customise your flight search to find flights from London Luton Airport 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, momondo users made 279,928 searches. Data last updated 27 May 2026.
Use the filters below to find and compare flights from London Luton Airport to Siem Reap that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

LondonSiem Reap

LTN - SAI

LTNSAI

London Luton

Thu 18/6

07:00-09:00

2 stops20h 00m

Siem Reap–Angkor Intl

Thu 25/6

19:05-21:50

3 stops32h 45m

£977
Cheapest one-way

LondonSiem Reap

LTN - SAI

LTNSAI

London Luton

Tue 1/9

06:35-14:50

3 stops50h 15m

£362

LondonSiem Reap

LTN - SAI

LTNSAI

London Luton

Fri 26/6

15:15-09:00

3 stops35h 45m

£365

LondonSiem Reap

LTN - SAI

LTNSAI

London Luton

Thu 4/6

20:35-17:10

2 stops38h 35m

£421

LondonSiem Reap

LTN - SAI

LTNSAI

London Luton

Fri 5/6

20:35-17:10

2 stops38h 35m

£430

LondonSiem Reap

LTN - SAI

LTNSAI

London Luton

Fri 5/6

07:05-21:30

3 stops32h 25m

£431

LondonSiem Reap

LTN - SAI

LTNSAI

London Luton

Tue 1/9

15:00-14:50

3 stops41h 50m

£432

LondonSiem Reap

LTN - SAI

LTNSAI

London Luton

Sun 30/8

08:00-18:55

2 stops28h 55m

£440

LondonSiem Reap

LTN - SAI

LTNSAI

London Luton

Sun 30/8

08:00-18:55

2 stops28h 55m

£443
Fastest single journey

LondonSiem Reap

LTN - SAI

LTNSAI

London Luton

Sat 6/6

07:15-17:10

3 stops27h 55m

£456

Flights are sorted by cheapest return flights first.

Showing 1-10 of 11 resultsSorted by cheapest first
1
2

When to book flights from London Luton Airport to Siem Reap

Are you open to changing your travel dates? Check out the ideal times to fly from London Luton Airport to Siem Reap according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap London Luton Airport to Siem Reap (LTN to SAI) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Luton Airport to Siem Reap

Fastest flight time

20h 00m

Direct flights

None
The fastest flight from London Luton Airport to Siem Reap takes 20h 00m
There are no direct flights from London Luton Airport to Siem Reap. There are no popular flight routes from London Luton Airport to Siem Reap.
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Frequently asked questions about flying from London Luton Airport to Siem Reap

  • How far is London Luton to Siem Reap–Angkor Intl by plane?

    London Luton and Siem Reap–Angkor Intl are 6078.9 mi apart from one another. A reasonable flight in good conditions will take 20h 00m.

  • When did momondo last update prices for flights from London Luton Airport to Siem Reap–Angkor Intl Airport?

    Prices for flights from London Luton Airport to Siem Reap–Angkor Intl Airport refresh daily.

  • How old do you have to be to fly from London Luton Airport to Siem Reap–Angkor Intl Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Luton Airport to Siem Reap–Angkor Intl Airport.

  • What documentation or ID do you need to fly to Siem Reap–Angkor Intl Airport?

    The travel and health documents you'll need for your trip to Siem Reap–Angkor Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Siem Reap–Angkor Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Frequently asked questions about flying from London Luton Airport to Siem Reap

  • How do I get Price Alerts for flights from London Luton Airport to Siem Reap?

    Confirm your travel details to search for the latest offers for flights from London Luton Airport to Siem Reap. While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.

  • How can I save money on flights from London Luton Airport to Siem Reap with momondo?

    Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.

  • How does momondo find its flight prices?

    momondo shows deals across 700+ competitors all at once. momondo is active in 30 international markets, so you can have access to a wide range of options from airlines and OTAs alike.

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from London to Siem Reap. momondo saves you time and could save you money on your trip.

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

momondo does allow users to show only those flights to Siem Reap from London which offer a flexible booking policy as well as other useful filters and features.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from London to Siem Reap.

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

Price alerts on flights to Siem Reap from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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Cabin classes currently available on flights to Siem Reap

List of cabin classes available on flights landing in Siem Reap. Availability may vary depending on flight origin and airline.
First Class to Siem Reap
Business Class to Siem Reap