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ONT to CPR: distance & flight time
Ontario (Ontario International Airport) → Casper (Casper-Natrona County International Airport)
857 mi
1,379 km · 745 nm
2h 20m
estimated nonstop flight time
+1h
time difference · heading northeast
See live ONT→CPR fares Phone-only fares on this route — call free
Flight time details
857 miles nonstop takes roughly 2h 20m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time gain when reading arrival times on your ticket.
The two airports
- ONT — Ontario International Airport · Ontario, United States
- CPR — Casper-Natrona County International Airport · Casper, 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 ONT
- CCB · Cable Airport6 mi away
- CNO · Chino Airport6 mi away
- LAX · Los Angeles International Airport47 mi away
- RAL · Riverside Municipal Airport11 mi away
Near CPR
- RWL · Rawlins Municipal Airport/Harvey Field85 mi away
- RIW · Riverton Regional Airport101 mi away
- SAA · Shively Field103 mi away
- WRL · Worland Municipal Airport104 mi away
Frequently asked questions
How far is ONT from CPR?
The flight distance from Ontario (ONT) to Casper (CPR) is 857 miles (1,379 km, 745 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ONT to CPR?
A nonstop flight takes about 2h 20m 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 Ontario and Casper?
Casper is 1 hour ahead of Ontario.
What is the cheapest way to fly from ONT to CPR?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ONT–CPR that never appear on search engines, with no booking fees.