Your next trip, last seen at €441
Lowest observedWhen to fly
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The lowest fare we observed for each month. Open a month to see its days, then pick your outbound and return. A day with no price is one we will search for you.
- Airlines seen
- Thai Airways, Turkish Airlines
- Typical journey time
- 12h 45m
About this route
Explore the fares we observed from London to Siem Reap. Prices move often, so pick your dates to see the latest options.
- Route distance
- 9,787 km
- Typical journey time
- 12h 45m
- Airlines seen
- Thai Airways, Turkish Airlines
- Alternative airports
- LCY, LGW, LTN, SEN, STN
Route-level information; individual journeys vary.
We have not observed non-stop service on this route; the fares shown include at least one stop.
A clearer picture of your fare
Airport to city: straight-line distance
- London City Airport (LCY) → London, city gazetteer reference point (51.5074, -0.1278): ≈ 13 km.
- London Heathrow (LHR) → London, city gazetteer reference point (51.5074, -0.1278): ≈ 23 km.
- London Gatwick (LGW) → London, city gazetteer reference point (51.5074, -0.1278): ≈ 40 km.
- London Luton (LTN) → London, city gazetteer reference point (51.5074, -0.1278): ≈ 44 km.
- London Stansted (STN) → London, city gazetteer reference point (51.5074, -0.1278): ≈ 49 km.
- London Southend Airport (SEN) → London, city gazetteer reference point (51.5074, -0.1278): ≈ 57 km.
- Siem Reap-Angkor International Airport (SAI) → Siem Reap, city gazetteer reference point (13.3633, 103.8564): ≈ 40 km.
Approximate distances calculated from coordinates, not road distances or travel times. These airports serve the city; they are not confirmed endpoints of an offer.
Frequently asked
How much was a flight from London to Siem Reap?
A fare of €441 was seen on 22 Sep 2026. Fares change, so search your dates for the current price.
Are there direct flights from London to Siem Reap?
Our data holds no non-stop flight from London to Siem Reap. The fares on this page include at least one stop.
Which airlines fly from London to Siem Reap?
These are the carriers we have seen on the route: Thai Airways, Turkish Airlines.
How many of the observed London to Siem Reap fares were non-stop?
None of the 3 fares we observed was non-stop; every one included at least one stop. That describes our observations, not every flight that operates.
How observed prices work, what "No data" means and what a fare includes: Read the flight price guide
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Recently observed fares. Prices may change.
Last checked: 11 Oct 2026