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KLS to SZL: distance & flight time
Kelso (Southwest Washington Regional Airport) → Knobnoster (Whiteman Air Force Base)
1,571 mi
2,528 km · 1,365 nm
3h 33m
estimated nonstop flight time
+2h
time difference · heading east
See live KLS→SZL fares Phone-only fares on this route — call free
Flight time details
1,571 miles nonstop takes roughly 3h 33m gate to gate, flying east. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 2-hour time gain when reading arrival times on your ticket.
The two airports
- KLS — Southwest Washington Regional Airport · Kelso, United States
- SZL — Whiteman Air Force Base · Knobnoster, 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 SZL
- MKC · Charles B. Wheeler Downtown Airport62 mi away
- OJC · Johnson County Executive Airport65 mi away
- AIZ · Lee C Fine Memorial Airport70 mi away
- COU · Columbia Regional Airport72 mi away
Frequently asked questions
How far is KLS from SZL?
The flight distance from Kelso (KLS) to Knobnoster (SZL) is 1,571 miles (2,528 km, 1,365 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from KLS to SZL?
A nonstop flight takes about 3h 33m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
Are there nonstop flights from KLS to SZL?
Nonstop service on KLS–SZL depends on the season and the day of week. Run the fare search on this page with the nonstop filter applied to see current direct options; when there is no nonstop, a single connection through a carrier hub adds roughly 2–4 hours to the 3h 33m nonstop estimate.
What is the time difference between Kelso and Knobnoster?
Knobnoster is 2 hours ahead of Kelso.
What is the cheapest way to fly from KLS to SZL?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on KLS–SZL that never appear on search engines, with no booking fees.
Why are some KLS to SZL fares phone-only?
Consolidator contracts let us sell certain KLS–SZL tickets below the price airlines permit us to publish online, so those fares can only be quoted over the phone. Call the travel desk and an agent will check phone-only inventory for your dates.