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REP to CMI: distance & flight time
Siem-reap (Siem Reap International Airport) → Champaign (University of Illinois Willard Airport)
8,663 mi
13,942 km · 7,528 nm
17h 27m
estimated nonstop flight time
-12h
time difference · heading north
See live REP→CMI fares Phone-only fares on this route — call free
Flight time details
8,663 miles nonstop takes roughly 17h 27m 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
- REP — Siem Reap International Airport · Siem-reap, Cambodia
- 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 REP
- BBM · Battambang Airport45 mi away
- KZC · Kampong Chhnang Airport95 mi away
- PXR · Surin Airport103 mi away
- TDX · Trat Airport128 mi away
Near CMI
Frequently asked questions
How far is REP from CMI?
The flight distance from Siem-reap (REP) to Champaign (CMI) is 8,663 miles (13,942 km, 7,528 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from REP to CMI?
A nonstop flight takes about 17h 27m 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 Siem-reap and Champaign?
Champaign is 12 hours behind Siem-reap.
What is the cheapest way to fly from REP to CMI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on REP–CMI that never appear on search engines, with no booking fees.