Need help booking?
Unpublished phone-only deals available
USM to CMI: distance & flight time
Ko Samui (Samui Airport) → Champaign (University of Illinois Willard Airport)
8,969 mi
14,435 km · 7,794 nm
18h 3m
estimated nonstop flight time
-12h
time difference · heading north
See live USM→CMI fares Phone-only fares on this route — call free
Flight time details
8,969 miles nonstop takes roughly 18h 3m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 12-hour time set-back when reading arrival times on your ticket.
The two airports
- USM — Samui Airport · Ko Samui, Thailand
- CMI — University of Illinois Willard Airport · Champaign, United States
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 USM
- URT · Surat Thani Airport69 mi away
- NST · Nakhon Si Thammarat Airport70 mi away
- CJM · Chumphon Airport93 mi away
- UNN · Ranong Airport102 mi away
Near CMI
Frequently asked questions
How far is USM from CMI?
The flight distance from Ko Samui (USM) to Champaign (CMI) is 8,969 miles (14,435 km, 7,794 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from USM to CMI?
A nonstop flight takes about 18h 3m 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 Ko Samui and Champaign?
Champaign is 12 hours behind Ko Samui.
What is the cheapest way to fly from USM to CMI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on USM–CMI that never appear on search engines, with no booking fees.