How long is the flight from London City Airport to Region of Siem Reap?

SWISS and KLM can get you from London City Airport to Region of Siem Reap in just under 20h 20m. Your travel time can differ by up to 6h 10m. London City Airport and Region of Siem Reap are separated by a distance of 6084 mi. Both multi-stop and direct flights can be found to your destination and back.

In terms of precipitation, rainfall in Region of Siem Reap ranges from 0.0 - 260.0 inches per month. September is typically the wettest month, when rainfall can reach 260.0 mm. January is typically the driest time to visit Region of Siem Reap when rainfall is around 0.0 mm.

If weather is an important factor for your trip to Region of Siem Reap, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 29.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 24.0 C).

What is the cheapest time of day to fly from LCY to SI?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London City Airport to Region of Siem Reap as you normally would.

Can I find deals for flights from London City to Siem Reap that include hotel bookings?

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

How can I find direct flights from London City to Siem Reap?

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

Can I find deals for business class flights from London City to Siem Reap?

Yes. Cheapflights offers flight deals from London City 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.

£471+ Cheap Flights from London City Airport to Siem Reap

Cheap flight deals from London City to Siem Reap

Enter your travel dates to find the best prices.

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Best

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Cheapest flights from London City to Siem Reap
Explore the most affordable flight options available from London City to Siem Reap. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 September 2026.

Mon 23/1113:30 -

2 stops22h 15m

Mon 30/1116:50 -

2 stops22h 50m

Deal found 3/9£649

Wed 25/1113:30 -

2 stops22h 15m

Sun 13/1209:55 -

2 stops29h 45m

Deal found 4/9£667

Sat 21/1112:20 -

2 stops23h 25m

Mon 30/1116:50 -

2 stops22h 50m

Deal found 3/9£674

Tue 15/909:15 -

2 stops27h 40m

Wed 14/1009:40 -

2 stops32h 55m

Deal found 4/9£707

Tue 15/909:15 -

2 stops27h 40m

Tue 13/1009:40 -

2 stops29h 00m

Deal found 6/9£732

Wed 16/909:15 -

2 stops27h 40m

Wed 14/1009:40 -

2 stops37h 45m

Deal found 6/9£735

Wed 16/913:10 -

2 stops23h 45m

Wed 14/1016:00 -

2 stops22h 40m

Deal found 5/9£737

Find flight deals from London City to Siem Reap

Round-trip from	£649
One-way from	£471
Popular in	December
Cheapest in	July
Average price	£766

SWISS
23/11-30/11
4 total stops
45h 05m total
London to Siem Reap

Search Deals

SWISS
2/2-31/12
2 total stops
26h 30m total
London to Siem Reap

Search Deals

Highest demand for flights based on searches. 10% potential increase in price (£67 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease (£25 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2026

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Cheapflights Fare Finder

Use the filters below to find and compare flights from London City Airport to Siem Reap that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonSiem Reap

LCY London City - SAI Siem Reap–Angkor Intl

LCYSAI

London City

Tue 2/2

09:15-18:45

2 stops26h 30m

Siem Reap–Angkor Intl

Wed 31/12

00:00-18:00

Nonstop0h 00m

£471

LondonSiem Reap

LCY London City - SAI Siem Reap–Angkor Intl

LCYSAI

London City

Sat 28/11

12:20-18:45

2 stops23h 25m

Siem Reap–Angkor Intl

Wed 31/12

00:00-18:00

Nonstop0h 00m

£496

LondonSiem Reap

LCY London City - SAI Siem Reap–Angkor Intl

LCYSAI

London City

Thu 5/11

09:15-16:05

3 stops23h 50m

Siem Reap–Angkor Intl

Wed 31/12

00:00-18:00

Nonstop0h 00m

£515

LondonSiem Reap

LCY London City - SAI Siem Reap–Angkor Intl

LCYSAI

London City

Tue 13/10

09:15-18:55

2 stops27h 40m

Siem Reap–Angkor Intl

Wed 31/12

00:00-18:00

Nonstop0h 00m

£607

LondonSiem Reap

LCY London City - SAI Siem Reap–Angkor Intl

LCYSAI

London City

Mon 8/2

09:15-18:45

2 stops26h 30m

Siem Reap–Angkor Intl

Wed 10/3

16:50-08:40

2 stops22h 50m

£715

LondonSiem Reap

LCY London City - SAI Siem Reap–Angkor Intl

LCYSAI

London City

Mon 28/12

19:30-08:45

2 stops30h 15m

Siem Reap–Angkor Intl

Wed 31/12

00:00-18:00

Nonstop0h 00m

£732

LondonSiem Reap

LCY London City - SAI Siem Reap–Angkor Intl

LCYSAI

London City

Mon 23/11

13:30-18:45

2 stops22h 15m

Siem Reap–Angkor Intl

Sun 29/11

09:55-08:40

2 stops29h 45m

£841

LondonSiem Reap

LCY London City - SAI Siem Reap–Angkor Intl

LCYSAI

London City

Thu 24/9

09:15-18:55

2 stops27h 40m

Siem Reap–Angkor Intl

Wed 31/12

00:00-18:00

Nonstop0h 00m

£851

LondonSiem Reap

LCY London City - SAI Siem Reap–Angkor Intl

LCYSAI

London City

Wed 6/1

09:15-18:45

2 stops26h 30m

Siem Reap–Angkor Intl

Wed 31/12

00:00-18:00

Nonstop0h 00m

£851

Fastest return journey

LondonSiem Reap

LCY London City - SAI Siem Reap–Angkor Intl

LCYSAI

London City

Fri 8/1

13:30-18:45

2 stops22h 15m

Siem Reap–Angkor Intl

Wed 31/12

00:00-18:00

Nonstop0h 00m

£851

Flights are sorted by cheapest return flights first.

Deals found on 5/9

Showing 1-10 of 18 resultsSorted by cheapest first

Best time to book a flight from London City to Siem Reap

Have a flexible travel schedule? Discover the best time to fly to Siem Reap from London City with our price prediction graph.

LCY-SAI

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 London City Airport to Siem Reap

LCY-KHSI

LCY-SAI

No data available for this route at this time. Please check back soon.

Related info for your journey

How long is the flight from London City Airport to Region of Siem Reap?
SWISS and KLM can get you from London City Airport to Region of Siem Reap in just under 20h 20m. Your travel time can differ by up to 6h 10m. London City Airport and Region of Siem Reap are separated by a distance of 6084 mi. Both multi-stop and direct flights can be found to your destination and back.
Can I find deals for flights from London City to Siem Reap that include hotel bookings?
Yes. In addition to deals on London City to Siem Reap flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from London City to Siem Reap?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London City to Siem Reap.
Can I find deals for business class flights from London City to Siem Reap?
Yes. Cheapflights offers flight deals from London City 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.

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

Cheapflights helps you find that perfect flight to Siem Reap from London City 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 London City to Siem Reap with no change fees?

Need flexible booking options for your flight to Siem Reap from London City? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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

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Cheap flights from London City Airport to Siem Reap from £471

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/2. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from London City to Siem Reap

Cheapest flights from London City to Siem ReapExplore the most affordable flight options available from London City to Siem Reap. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 September 2026.

Explore the most affordable flight options available from London City to Siem Reap. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 September 2026.

Best flights from London City to Siem ReapDiscover carefully curated flight deals from London City to Siem Reap that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 8 September 2026.

Discover carefully curated flight deals from London City to Siem Reap that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 8 September 2026.

Last-minute flights from London City to Siem ReapDiscover last-minute flight deals from London City to Siem Reap. Data last updated 8 September 2026 and is based on user searches.

Discover last-minute flight deals from London City to Siem Reap. Data last updated 8 September 2026 and is based on user searches.

One-way flights from London City to Siem ReapSearch for one-way flight options from London City to Siem Reap. Find affordable one-way fares based on user searches. Data last updated 8 September 2026.

Search for one-way flight options from London City to Siem Reap. Find affordable one-way fares based on user searches. Data last updated 8 September 2026.

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Use the filters below to find and compare flights from London City Airport to Siem Reap that are best for you.

Best time to book a flight from London City to Siem Reap

Have a flexible travel schedule? Discover the best time to fly to Siem Reap from London City with our price prediction graph.

Cheapflights Insights

Related info for your journey

How long is the flight from London City Airport to Region of Siem Reap?

Can I find deals for flights from London City to Siem Reap that include hotel bookings?

How can I find direct flights from London City to Siem Reap?

Can I find deals for business class flights from London City to Siem Reap?

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.

Alternative routes for London City to Siem Reap

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Siem Reap by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to

Book a non-stop flight to one of these other cities located in .

Search flights from London City to Siem Reap by cabin class

Find flights from London City to Siem Reap, based on your preferred cabin class, be it economy, premium economy, business, or first class.

London City and Siem Reap flights

Browse other London City and Siem Reap flight options. Last updated on 8 September 2026.

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

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

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

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Cheapest flights from London City to Siem Reap
Explore the most affordable flight options available from London City to Siem Reap. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 September 2026.

Best flights from London City to Siem Reap
Discover carefully curated flight deals from London City to Siem Reap that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 8 September 2026.

Last-minute flights from London City to Siem Reap
Discover last-minute flight deals from London City to Siem Reap. Data last updated 8 September 2026 and is based on user searches.

One-way flights from London City to Siem Reap
Search for one-way flight options from London City to Siem Reap. Find affordable one-way fares based on user searches. Data last updated 8 September 2026.