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KLS to NST: distance & flight time
Kelso (Southwest Washington Regional Airport) → Nakhon Si Thammarat (Nakhon Si Thammarat Airport)
7,828 mi
12,599 km · 6,803 nm
15h 49m
estimated nonstop flight time
+14h
time difference · heading northwest
See live KLS→NST fares Phone-only fares on this route — call free
Flight time details
7,828 miles nonstop takes roughly 15h 49m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 14-hour time gain when reading arrival times on your ticket.
The two airports
- KLS — Southwest Washington Regional Airport · Kelso, United States
- NST — Nakhon Si Thammarat Airport · Nakhon Si Thammarat, Thailand
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 NST
- URT · Surat Thani Airport69 mi away
- USM · Samui Airport70 mi away
- KBV · Krabi Airport72 mi away
- TST · Trang Airport75 mi away
Frequently asked questions
How far is KLS from NST?
The flight distance from Kelso (KLS) to Nakhon Si Thammarat (NST) is 7,828 miles (12,599 km, 6,803 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from KLS to NST?
A nonstop flight takes about 15h 49m 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 Nakhon Si Thammarat?
Nakhon Si Thammarat is 14 hours ahead of Kelso.
What is the cheapest way to fly from KLS to NST?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on KLS–NST that never appear on search engines, with no booking fees.