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NHT to USM: distance & flight time
Northolt (RAF Northolt) → Ko Samui (Samui Airport)
6,146 mi
9,890 km · 5,340 nm
12h 31m
estimated nonstop flight time
+6h
time difference · heading east
See live NHT→USM fares Phone-only fares on this route — call free
Flight time details
6,146 miles nonstop takes roughly 12h 31m gate to gate, flying east. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 6-hour time gain when reading arrival times on your ticket.
The two airports
- NHT — RAF Northolt · Northolt, United Kingdom
- USM — Samui Airport · Ko Samui, Thailand
Distances are great-circle ("as the crow flies") — the same basis airlines use for frequent-flyer miles.
Alternate airports can cut this fare
Flying from or into a nearby airport is the #1 trick our agents use to beat online prices. Call and we'll compare every combination on one call.
Near NHT
- LHR · London Heathrow Airport6 mi away
- LGW · London Gatwick Airport30 mi away
- HYC · Wycombe Air Park17 mi away
- LCY · London City Airport21 mi away
Near USM
- URT · Surat Thani Airport69 mi away
- NST · Nakhon Si Thammarat Airport70 mi away
- CJM · Chumphon Airport93 mi away
- UNN · Ranong Airport102 mi away
Frequently asked questions
How far is NHT from USM?
The flight distance from Northolt (NHT) to Ko Samui (USM) is 6,146 miles (9,890 km, 5,340 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from NHT to USM?
A nonstop flight takes about 12h 31m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
Are there nonstop flights from NHT to USM?
Nonstop service on NHT–USM depends on the season and the day of week. Run the fare search on this page with the nonstop filter applied to see current direct options; when there is no nonstop, a single connection through a carrier hub adds roughly 2–4 hours to the 12h 31m nonstop estimate.
What is the time difference between Northolt and Ko Samui?
Ko Samui is 6 hours ahead of Northolt.
What is the cheapest way to fly from NHT to USM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on NHT–USM that never appear on search engines, with no booking fees.
Why are some NHT to USM fares phone-only?
Consolidator contracts let us sell certain NHT–USM tickets below the price airlines permit us to publish online, so those fares can only be quoted over the phone. Call the travel desk and an agent will check phone-only inventory for your dates.