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KLS to WBU: distance & flight time
Kelso (Southwest Washington Regional Airport) → Boulder (Boulder Municipal Airport)
983 mi
1,582 km · 854 nm
2h 36m
estimated nonstop flight time
+1h
time difference · heading east
See live KLS→WBU fares Phone-only fares on this route — call free
Flight time details
983 miles nonstop takes roughly 2h 36m gate to gate, flying east. 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
- WBU — Boulder Municipal Airport · Boulder, 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 WBU
- DEN · Denver International Airport32 mi away
- BJC · Rocky Mountain Metropolitan Airport11 mi away
- FNL · Northern Colorado Regional Airport31 mi away
- BFK · Buckley Air Force Base34 mi away
Frequently asked questions
How far is KLS from WBU?
The flight distance from Kelso (KLS) to Boulder (WBU) is 983 miles (1,582 km, 854 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from KLS to WBU?
A nonstop flight takes about 2h 36m 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 Boulder?
Boulder is 1 hour ahead of Kelso.
What is the cheapest way to fly from KLS to WBU?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on KLS–WBU that never appear on search engines, with no booking fees.