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KLS to PSS: distance & flight time
Kelso (Southwest Washington Regional Airport) → Posadas (Libertador Gral D Jose De San Martin Airport)
6,576 mi
10,584 km · 5,715 nm
13h 22m
estimated nonstop flight time
+4h
time difference · heading southeast
See live KLS→PSS fares Phone-only fares on this route — call free
Flight time details
6,576 miles nonstop takes roughly 13h 22m gate to gate, flying southeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 4-hour time gain when reading arrival times on your ticket.
The two airports
- KLS — Southwest Washington Regional Airport · Kelso, United States
- PSS — Libertador Gral D Jose De San Martin Airport · Posadas, Argentina
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 PSS
- ENO · Encarnación Airport14 mi away
- AYO · Juan De Ayolas Airport54 mi away
- SRA · Santa Rosa Airport96 mi away
- ELO · El Dorado Airport110 mi away
Frequently asked questions
How far is KLS from PSS?
The flight distance from Kelso (KLS) to Posadas (PSS) is 6,576 miles (10,584 km, 5,715 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from KLS to PSS?
A nonstop flight takes about 13h 22m 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 Posadas?
Posadas is 4 hours ahead of Kelso.
What is the cheapest way to fly from KLS to PSS?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on KLS–PSS that never appear on search engines, with no booking fees.