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BWI to USM: distance & flight time
Baltimore (Baltimore/Washington International Thurgood Marshall Airport) → Ko Samui (Samui Airport)
9,064 mi
14,587 km · 7,876 nm
18h 14m
estimated nonstop flight time
+11h
time difference · heading north
See live BWI→USM fares Phone-only fares on this route — call free
Flight time details
9,064 miles nonstop takes roughly 18h 14m 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
- BWI — Baltimore/Washington International Thurgood Marshall Airport · Baltimore, 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 BWI
- DCA · Ronald Reagan Washington National Airport30 mi away
- IAD · Washington Dulles International Airport45 mi away
- FME · Tipton Airport8 mi away
- ANP · Lee Airport17 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 BWI from USM?
The flight distance from Baltimore (BWI) to Ko Samui (USM) is 9,064 miles (14,587 km, 7,876 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from BWI to USM?
A nonstop flight takes about 18h 14m 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 Baltimore and Ko Samui?
Ko Samui is 11 hours ahead of Baltimore.
What is the cheapest way to fly from BWI to USM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on BWI–USM that never appear on search engines, with no booking fees.