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KLS to ONO: distance & flight time
Kelso (Southwest Washington Regional Airport) → Ontario (Ontario Municipal Airport)
322 mi
517 km · 279 nm
1h 19m
estimated nonstop flight time
+1h
time difference · heading southeast
See live KLS→ONO fares Phone-only fares on this route — call free
Flight time details
322 miles nonstop takes roughly 1h 19m gate to gate, flying southeast. 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
- KLS — Southwest Washington Regional Airport · Kelso, United States
- ONO — Ontario Municipal 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 ONO
- BOI · Boise Air Terminal/Gowen Field50 mi away
- BKE · Baker City Municipal Airport69 mi away
- MYL · McCall Municipal Airport75 mi away
- MUO · Mountain Home Air Force Base88 mi away
Frequently asked questions
How far is KLS from ONO?
The flight distance from Kelso (KLS) to Ontario (ONO) is 322 miles (517 km, 279 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from KLS to ONO?
A nonstop flight takes about 1h 19m 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 Kelso and Ontario?
Ontario is 1 hour ahead of Kelso.
What is the cheapest way to fly from KLS to ONO?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on KLS–ONO that never appear on search engines, with no booking fees.