Need help booking?
Unpublished phone-only deals available
KLS to OSH: distance & flight time
Kelso (Southwest Washington Regional Airport) → Oshkosh (Wittman Regional Airport)
1,670 mi
2,687 km · 1,451 nm
3h 44m
estimated nonstop flight time
+2h
time difference · heading east
See live KLS→OSH fares Phone-only fares on this route — call free
Flight time details
1,670 miles nonstop takes roughly 3h 44m 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
- OSH — Wittman Regional Airport · Oshkosh, 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 OSH
- FLD · Fond du Lac County Airport15 mi away
- ATW · Appleton International Airport19 mi away
- SBM · Sheboygan County Memorial Airport38 mi away
- GRB · Austin Straubel International Airport41 mi away
Frequently asked questions
How far is KLS from OSH?
The flight distance from Kelso (KLS) to Oshkosh (OSH) is 1,670 miles (2,687 km, 1,451 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from KLS to OSH?
A nonstop flight takes about 3h 44m 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 Oshkosh?
Oshkosh is 2 hours ahead of Kelso.
What is the cheapest way to fly from KLS to OSH?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on KLS–OSH that never appear on search engines, with no booking fees.