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PMH to USM: distance & flight time
Portsmouth (Greater Portsmouth Regional Airport) → Ko Samui (Samui Airport)
9,088 mi
14,626 km · 7,897 nm
18h 17m
estimated nonstop flight time
—
time difference · heading north
See live PMH→USM fares Phone-only fares on this route — call free
Flight time details
9,088 miles nonstop takes roughly 18h 17m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Both airports share the same local time, so schedules read exactly as flown.
The two airports
- PMH — Greater Portsmouth Regional Airport · Portsmouth, 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 PMH
- HTS · Tri-State/Milton J. Ferguson Field36 mi away
- ATO · Ohio University Snyder Field42 mi away
- ILN · Wilmington Airpark65 mi away
- LCK · Rickenbacker International Airport67 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 PMH from USM?
The flight distance from Portsmouth (PMH) to Ko Samui (USM) is 9,088 miles (14,626 km, 7,897 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from PMH to USM?
A nonstop flight takes about 18h 17m 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 cheapest way to fly from PMH to USM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on PMH–USM that never appear on search engines, with no booking fees.