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

Prices for flights from London Heathrow Airport to Siem Reap–Angkor Intl Airport were last updated today.

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

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from London Heathrow 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 required for your trip to Siem Reap–Angkor Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Siem Reap–Angkor Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

£679 Cheap Flights from London Heathrow Airport to Siem Reap in 2024/25

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Find the cheapest flights from London Heathrow Airport to Siem Reap

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Cheap return flights

These are some of the best return flight deals from London Heathrow Airport to Siem Reap that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from London Heathrow Airport to Siem Reap.

Cheap last-minute flights

Planning a quick getaway from London Heathrow Airport to Siem Reap? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to Siem Reap, so you can enjoy a seamless trip without stopovers.

Cheap bus & train deals from London Heathrow Airport to Siem Reap

Find recent round-trip train or bus tickets from London Heathrow Airport to Siem Reap.

All round-trip flight deals to Siem Reap

The cheapest plane tickets to Siem Reap found on KAYAK recently.

LHR-SAI

6106 mimulti-stop

SAI-LHR

6106 mimulti-stop

Multiple Airlines

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LHR-SAI

6106 mimulti-stop

Multiple Airlines

Find Deal

How to get the cheapest flight ticket from London Heathrow Airport to Siem Reap

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Siem Reap?

The month of June is, on average, the cheapest month to fly to Siem Reap from London Heathrow Airport, with most prices found around £724. If you don’t want to visit Siem Reap in June, then you should wait until May to fly from London Heathrow Airport, when ticket prices are also cheap, with an average price of £732.

What is the cheapest day to depart on your flight to Siem Reap?

On average, the least expensive day to fly to Siem Reap from London Heathrow Airport is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as £737. However, this price may fluctuate depending on the airline, the season, and holidays. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around £1,028. These prices are subject to change though, so be sure to set up a Price Alert for flights to Siem Reap.

What is the cheapest time of day to depart on your flight to Siem Reap?

The cheapest time of day to fly to Siem Reap is at midday when flights can be purchased for as low as £0. In contrast, the most expensive time of day to depart to Siem Reap is in the afternoon when prices are around £933.

When to book flights from London Heathrow Airport to Siem Reap

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

Estimated return price

Cheap London Heathrow Airport to Siem Reap (LHR to SAI) flight deals and tips

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

Direct flights	None

There are no direct flights from London Heathrow Airport to Siem Reap. There are no popular flight routes from London Heathrow Airport to Siem Reap.

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How far is London Heathrow to Siem Reap–Angkor Intl by plane?
A flight from London Heathrow to Siem Reap–Angkor Intl will travel around 6091.7 mi.
When did momondo last update prices for flights from London Heathrow Airport to Siem Reap–Angkor Intl Airport?
Prices for flights from London Heathrow Airport to Siem Reap–Angkor Intl Airport were last updated today.
How old do you have to be to fly from London Heathrow Airport to Siem Reap–Angkor Intl Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from London Heathrow 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 required for your trip to Siem Reap–Angkor Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Siem Reap–Angkor Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular airline from London Heathrow Airport to Siem Reap?
Based on momondo bookings for this flight route, the most popular airline on flight routes from London Heathrow Airport to Siem Reap is Singapore Airlines (66% of total bookings). The next most popular airlines are Thai Airways (24%) and Vietnam Airlines (10%).

Best airlines flying from London Heathrow Airport to Siem Reap

Compare and see reviews for airlines that fly from London Heathrow Airport to Siem Reap with momondo

Airline	Rating	Free Cancellation	Price
Singapore Airlines	PriceFrom £699	Free Cancellation	Rating 8.1 1,330 reviews	Search Singapore Airlines flights
Vietnam Airlines	PriceFrom £726	Free Cancellation	Rating 7.6 223 reviews	Search Vietnam Airlines flights
Thai Airways	PriceFrom £870	Free Cancellation	Rating 7.7 357 reviews	Search Thai Airways flights

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?

Flights from London to Siem Reap with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Siem Reap from London.

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.