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KLS to SFZ: distance & flight time
Kelso (Southwest Washington Regional Airport) → Smithfield (North Central State Airport)
2,526 mi
4,065 km · 2,195 nm
5h 25m
estimated nonstop flight time
+3h
time difference · heading east
See live KLS→SFZ fares Phone-only fares on this route — call free
Flight time details
2,526 miles nonstop takes roughly 5h 25m gate to gate, flying east. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 3-hour time gain when reading arrival times on your ticket.
The two airports
- KLS — Southwest Washington Regional Airport · Kelso, United States
- SFZ — North Central State Airport · Smithfield, 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 SFZ
- BOS · General Edward Lawrence Logan International Airport39 mi away
- PVD · Theodore Francis Green State Airport14 mi away
- NCO · Quonset State Airport23 mi away
- OWD · Norwood Memorial Airport25 mi away
Frequently asked questions
How far is KLS from SFZ?
The flight distance from Kelso (KLS) to Smithfield (SFZ) is 2,526 miles (4,065 km, 2,195 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from KLS to SFZ?
A nonstop flight takes about 5h 25m 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 Smithfield?
Smithfield is 3 hours ahead of Kelso.
What is the cheapest way to fly from KLS to SFZ?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on KLS–SFZ that never appear on search engines, with no booking fees.