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KLS to ONT: distance & flight time
Kelso (Southwest Washington Regional Airport) → Ontario (Ontario International Airport)
879 mi
1,414 km · 764 nm
2h 23m
estimated nonstop flight time
Same time
time difference · heading south
See live KLS→ONT fares Phone-only fares on this route — call free
Flight time details
879 miles nonstop takes roughly 2h 23m gate to gate, flying south. Add 45–90 minutes per connection if there's no nonstop service. Both airports share the same local time, so schedules read exactly as flown.
The two airports
- KLS — Southwest Washington Regional Airport · Kelso, 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 KLS
- PDX · Portland International Airport39 mi away
- CLS · Chehalis Centralia Airport39 mi away
- HIO · Portland Hillsboro Airport40 mi away
- TTD · Portland Troutdale Airport46 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 KLS from ONT?
The flight distance from Kelso (KLS) to Ontario (ONT) is 879 miles (1,414 km, 764 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from KLS to ONT?
A nonstop flight takes about 2h 23m 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 cheapest way to fly from KLS to ONT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on KLS–ONT that never appear on search engines, with no booking fees.