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CGX to USM: distance & flight time
Chicago (Chicago Meigs Airport) → Ko Samui (Samui Airport)
8,852 mi
14,246 km · 7,692 nm
17h 49m
estimated nonstop flight time
+13h
time difference · heading north
See live CGX→USM fares Phone-only fares on this route — call free
Flight time details
8,852 miles nonstop takes roughly 17h 49m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 13-hour time gain when reading arrival times on your ticket.
The two airports
- CGX — Chicago Meigs Airport · Chicago, 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 CGX
- ORD · Chicago O'Hare International Airport17 mi away
- MDW · Chicago Midway International Airport9 mi away
- GYY · Gary Chicago International Airport20 mi away
- PWK · Chicago Executive Airport23 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 CGX from USM?
The flight distance from Chicago (CGX) to Ko Samui (USM) is 8,852 miles (14,246 km, 7,692 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from CGX to USM?
A nonstop flight takes about 17h 49m 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 CGX to USM?
Nonstop service on CGX–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 17h 49m nonstop estimate.
What is the time difference between Chicago and Ko Samui?
Ko Samui is 13 hours ahead of Chicago.
What is the cheapest way to fly from CGX to USM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on CGX–USM that never appear on search engines, with no booking fees.
Why are some CGX to USM fares phone-only?
Consolidator contracts let us sell certain CGX–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.