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OIR to CPR: distance & flight time
Okushiri (Okushiri Airport) → Casper (Casper-Natrona County International Airport)
5,283 mi
8,502 km · 4,591 nm
10h 50m
estimated nonstop flight time
-15h
time difference · heading northeast
See live OIR→CPR fares Phone-only fares on this route — call free
Flight time details
5,283 miles nonstop takes roughly 10h 50m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 15-hour time set-back when reading arrival times on your ticket.
The two airports
- OIR — Okushiri Airport · Okushiri, Japan
- 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 OIR
- HKD · Hakodate Airport74 mi away
- AOJ · Aomori Airport113 mi away
- OKD · Okadama Airport123 mi away
- CTS · New Chitose Airport125 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 OIR from CPR?
The flight distance from Okushiri (OIR) to Casper (CPR) is 5,283 miles (8,502 km, 4,591 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from OIR to CPR?
A nonstop flight takes about 10h 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 Okushiri and Casper?
Casper is 15 hours behind Okushiri.
What is the cheapest way to fly from OIR to CPR?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on OIR–CPR that never appear on search engines, with no booking fees.