Need help booking?
Unpublished phone-only deals available
CSM to ONT: distance & flight time
Clinton (Clinton Sherman Airport) → Ontario (Ontario International Airport)
1,048 mi
1,686 km · 910 nm
2h 45m
estimated nonstop flight time
-2h
time difference · heading west
See live CSM→ONT fares Phone-only fares on this route — call free
Flight time details
1,048 miles nonstop takes roughly 2h 45m gate to gate, flying west. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 2-hour time set-back when reading arrival times on your ticket.
The two airports
- CSM — Clinton Sherman Airport · Clinton, United States
- ONT — Ontario International Airport · Ontario, 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 CSM
- HBR · Hobart Regional Airport26 mi away
- LTS · Altus Air Force Base47 mi away
- FSI · Henry Post Army Air Field (Fort Sill)66 mi away
- LAW · Lawton Fort Sill Regional Airport69 mi away
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
Frequently asked questions
How far is CSM from ONT?
The flight distance from Clinton (CSM) to Ontario (ONT) is 1,048 miles (1,686 km, 910 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from CSM to ONT?
A nonstop flight takes about 2h 45m 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 Clinton and Ontario?
Ontario is 2 hours behind Clinton.
What is the cheapest way to fly from CSM to ONT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on CSM–ONT that never appear on search engines, with no booking fees.