Cheap flights from Siem Reap to London from £347

Cheap flights from Siem Reap to London from £347

Trusted by millions

Kiwi.com Guarantee for stress-free travel

One search, all the best deals

Explore flight deals to London

2 stops
Fri, May 29
Siem Reap SAILondon LGW
£347
Search
2 stops
Tue, May 26
Siem Reap SAILondon LGW
£353
Search
2 stops
Fri, May 29
Siem Reap SAILondon LGW
£364
Search
2 stops
Tue, May 26
Siem Reap SAILondon LHR
£432
Search
2 stops
Thu, May 28
Siem Reap SAILondon LHR
£441
Search
2 stops
Tue, May 26
Siem Reap SAILondon LHR
£441
Search

Not happy with the results? Try some of our useful filters

Search by stops

Search by carrier

Search by price

Search by departure date

2 stops
Fri, May 29 – Thu, Jun 4
Siem Reap SAILondon LGW
£872
Search
2 stops
Fri, May 29 – Wed, Jun 3
Siem Reap SAILondon LGW
£876
Search
2 stops
Fri, May 29 – Thu, Jun 4
Siem Reap SAILondon LGW
£882
Search
2 stops
Mon, May 25 – Fri, May 29
Siem Reap SAILondon LHR
£882
Search
2 stops
Tue, May 26 – Mon, Jun 1
Siem Reap SAILondon LGW
£886
Search
2 stops
Fri, May 29 – Wed, Jun 3
Siem Reap SAILondon LGW
£887
Search

Not happy with the results? Try some of our useful filters

Search by stops

Search by carrier

Search by price

Search by departure date

How much do flights to London cost?

Cheapest one-way trip

£347

Cheapest round-trip

£872

Average round-trip

£985

Includes rare itinerary

Travel hack

Most popular airline

Thai AirAsia

Getting from London airports to the city center

Fastest options: Heathrow Express (LHR), Gatwick Express (LGW), Stansted Express (STN). Best value: Underground, DLR, Elizabeth line and commuter trains.

London is served by six airports, each offering a variety of airport transfers to city center destinations. Heathrow Airport (LHR) lies 24 km west of central London, Gatwick Airport (LGW) is 45 km to the south, Stansted Airport (STN) sits 64 km northeast, Luton Airport (LTN) is 46 km north, London City Airport (LCY) is just 11 km east, and Southend Airport (SEN) is 64 km to the east. Transport options include express trains, the Underground, DLR, coaches, taxis, ride-hailing services, and private transfers. Journey times and costs vary depending on the airport, time of day, and traffic conditions.

From London Heathrow Airport (LHR)

Transport Option

Typical time

Typical cost

Frequency

Best for

15 min

£15-£25 (advance vs on-the-day fares)

every 15 min

fastest to Paddington

28-38 min

£12-£13 (Oyster/contactless fare)

every 5–10 min

central London with stops

35-75 min

£60-£100 (metered; varies by traffic)

on-demand 24/7 (traffic dependent)

door-to-door with luggage

From London Gatwick Airport (LGW)

Transport Option

Typical time

Typical cost

Frequency

Best for

30 min

£18-£23 (advance vs on-the-day fares)

every 15 min

fastest to Victoria

From London Stansted Airport (STN)

Transport Option

Typical time

Typical cost

Frequency

Best for

45-50 min

£20-£26 (advance vs on-the-day fares)

every 15–30 min

fastest to the City

From London Luton Airport (LTN)

Transport Option

Typical time

Typical cost

Frequency

Best for

35-55 min

£12-£20 (includes DART transfer)

every 10–20 min

direct to St Pancras

From London City Airport (LCY)

Transport Option

Typical time

Typical cost

Frequency

Best for

15-25 min

£3-£5 (Oyster/contactless fare)

every 4–10 min

Canary Wharf and City

From London Southend Airport (SEN)

Transport Option

Typical time

Typical cost

Frequency

Best for

50-60 min

£18-£25 (advance vs on-the-day fares)

every 20–30 min

direct to Liverpool Street

Notes:

  • Prices in GBP; table created in 2025 and subject to change.
  • Contactless and Oyster are valid on the Underground, DLR, Elizabeth line, and most National Rail services within London zones.
  • Black cabs are metered; ride-hailing prices vary with demand. Road traffic can significantly affect journey times (traffic dependent).
  • We recommend checking official transport websites for your travel planning.

Updated: December 2025

Key info about flying to London

Depart from
Siem Reap–Angkor International Airport
Arrive to
Gatwick
Average flights per week
400
Flight distance
Worth visiting
Avebury - British Museum - Canterbury Cathedral - Isle of Wight - Natural History Museum - Portsea Island - Roman Baths, Bath - Stonehenge - St. Paul's Cathedral - Tate Modern - Tower of London

Check-in for a flight from Siem Reap to London

NameCarrier codeIATA CodePassport needed during booking
Thai AirAsiaAIQFDNo
Etihad AirwaysETDEYNo
Qatar AirwaysQTRQRYes
RyanairRYRFRNo
EmiratesUAEEKNo

Online check-in is not available for these airlines.

Weather in London

Average Weather

MonthAverage monthly max temperatureAverage monthly min temperature
January7°C2°C
February8°C3°C
March11°C4°C
April14°C5°C
May17°C8°C
June20°C11°C
July22°C14°C
August22°C14°C
September19°C12°C
October15°C9°C
November10°C6°C
December8°C4°C
Hottest Month
22°C
July
Coldest month
2°C
January
Sunny days
281
days per year
Snow days
2
days per year

14 day forecast

Saturday
16 May
88%
13°C4°C
23 May
25°C15°C
Sunday
17 May
86%
16°C8°C
24 May
27°C14°C
Monday
18 May
82%
14°C6°C
25 May
18°C12°C
Tuesday
19 May
86%
18°C10°C
26 May
17°C9°C
Wednesday
20 May
86%
19°C12°C
27 May
20°C10°C
Thursday
21 May
23°C11°C
28 May
22°C9°C
Friday
22 May
25°C13°C
29 May
17°C14°C
Book your trip to arrive at Gatwick, London Stansted, Heathrow, Luton, or London City. The most popular airlines for this route are Thai AirAsia, Etihad Airways, Qatar Airways, Ryanair, and Emirates. Siem Reap and London have 400 direct flights per week. When you arrive at London, consider visiting Avebury, British Museum, Canterbury Cathedral, Isle of Wight, Natural History Museum, Portsea Island, Roman Baths, Bath, Stonehenge, St. Paul's Cathedral, Tate Modern, and Tower of London.

Frequently asked questions

What are the most popular routes to and from Siem Reap?
Travelers frequently search for route combinations, such as Siem Reap and Bangkok, Phnom Penh, Phuket City, Hanoi, Ho Chi Minh City, Singapore, Phuket Province, Chiang Mai, Kuala Lumpur, Sihanoukville Province, Bali, Da Nang, Denpasar, Manchester, Manila, Krabi, Perth, Melbourne, Cebu, Ko Samui.
What are the most popular routes to and from London?
Travelers frequently search for route combinations, such as London and Istanbul, Tel Aviv, Tirana, Bucharest, Barcelona, Chișinău, Athens, Paris, Madrid, Prague, Edinburgh, Rome, Málaga, Jeddah, Sofia, Bangkok, Larnaca, Bacău, Warsaw, Budapest.
What airports are near London?
The main airport in London is Gatwick. It is also served by Birmingham, Bristol, East Midlands, Cardiff, Bournemouth, Southampton, Exeter, Norwich, Humberside.
Which airlines fly between Siem Reap and London?
Currently, you can fly between Siem Reap and London with Thai AirAsia, Etihad Airways, Qatar Airways, Ryanair, Emirates.
When’s the best time to travel between Siem Reap and London?
If you don’t have specific dates for your trip between Siem Reap and London, you can enter a date range into the departure and return fields. Most carriers on the Kiwi.com website allow you to search and book up to six months from the day of your search. Order the search results by the best, cheapest, or fastest route, or find the cheapest outbound and return combination in the pricing table.
What flights operate between Siem Reap and London?
Traveling between Siem Reap and London, you can choose between direct (nonstop) flights or flights with one or more stops. You can select the number of stops on your journey, including an overnight stopover, and the duration of the stopover. What’s more, you can also select where you want to have your stopover. Want to say "Hi" to a friend in another city en route to your destination? Or fancy a quick round of shopping? Go Multi-City or Nomad and add places to your search that you wish to visit.
How many airports are there near London?
There are a number of airports in and around London. The main one is Gatwick and other nearby airports include Birmingham, Bristol, East Midlands, Cardiff, Bournemouth, Southampton, Exeter, Norwich, Humberside.
What time do nonstop (direct) flights between Siem Reap and London depart?
This depends on the airline’s flight schedule. You can easily select your preferred departure time when you search on our website or mobile app. Choose the time of day you wish to depart from Siem Reap, such as morning, afternoon, evening, or night, or select the exact hours for departure.
What time do nonstop (direct) flights between Siem Reap and London arrive?
This depends on the airline’s flight schedule. You can easily select your preferred arrival time when you search on our website or mobile app. Choose the time of day you wish to arrive at London, such as morning, afternoon, evening, or night, or select the exact hours for arrival.
What time do flights between Siem Reap and London depart?
What time do flights between Siem Reap and London arrive?

Planning a trip? Thanks to our Virtual Interlining algorithm, we offer billions of route combinations between any origin and destination in the world by plane. Find the cheapest routes and best deals, as well as the best dates to travel.

Search flightsSearch direct flights

Explore alternative trips

Flights from Siem Reap

Flights to London

The nearest countries with flights to London

Here is a list of countries people are flying from

Other destination countries from Siem Reap

Here is a list of countries people are flying to

Airports near Siem Reap

Download our app

Start your next adventure now. Download our app and explore cheap flights effortlessly!

Search flights
Find the best connection from Siem Reap to London

Search, compare, and book flights to get there.

Search flights