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CTH to USM: distance & flight time
Coatesville (Chester County G O Carlson Airport) → Ko Samui (Samui Airport)
9,005 mi
14,492 km · 7,825 nm
18h 7m
estimated nonstop flight time
+11h
time difference · heading north
See live CTH→USM fares Phone-only fares on this route — call free
Flight time details
9,005 miles nonstop takes roughly 18h 7m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 11-hour time gain when reading arrival times on your ticket.
The two airports
- CTH — Chester County G O Carlson Airport · Coatesville, United States
- 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 CTH
- PHL · Philadelphia International Airport34 mi away
- ILG · New Castle Airport25 mi away
- LNS · Lancaster Airport25 mi away
- RDG · Reading Regional Carl A Spaatz Field28 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 CTH from USM?
The flight distance from Coatesville (CTH) to Ko Samui (USM) is 9,005 miles (14,492 km, 7,825 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from CTH to USM?
A nonstop flight takes about 18h 7m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
What is the time difference between Coatesville and Ko Samui?
Ko Samui is 11 hours ahead of Coatesville.
What is the cheapest way to fly from CTH to USM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on CTH–USM that never appear on search engines, with no booking fees.