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CMI to KOS: distance & flight time
Champaign (University of Illinois Willard Airport) → Sihanoukville (Sihanoukville International Airport)
8,857 mi
14,254 km · 7,697 nm
17h 50m
estimated nonstop flight time
+12h
time difference · heading north
See live CMI→KOS fares Phone-only fares on this route — call free
Flight time details
8,857 miles nonstop takes roughly 17h 50m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 12-hour time gain when reading arrival times on your ticket.
The two airports
- CMI — University of Illinois Willard Airport · Champaign, United States
- KOS — Sihanoukville International Airport · Sihanoukville, Cambodia
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 CMI
Near KOS
- PQC · Phu Quoc International Airport37 mi away
- PNH · Phnom Penh International Airport106 mi away
- VKG · Rach Gia Airport110 mi away
- KZC · Kampong Chhnang Airport132 mi away
Frequently asked questions
How far is CMI from KOS?
The flight distance from Champaign (CMI) to Sihanoukville (KOS) is 8,857 miles (14,254 km, 7,697 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from CMI to KOS?
A nonstop flight takes about 17h 50m 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 Champaign and Sihanoukville?
Sihanoukville is 12 hours ahead of Champaign.
What is the cheapest way to fly from CMI to KOS?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on CMI–KOS that never appear on search engines, with no booking fees.