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YEC to SEA: distance & flight time
Yechon (Yecheon Airbase) → Seattle (Seattle Tacoma International Airport)
5,178 mi
8,333 km · 4,500 nm
10h 37m
estimated nonstop flight time
-16h
time difference · heading northeast
See live YEC→SEA fares Phone-only fares on this route — call free
Flight time details
5,178 miles nonstop takes roughly 10h 37m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 16-hour time set-back when reading arrival times on your ticket.
The two airports
- YEC — Yecheon Airbase · Yechon, South Korea
- SEA — Seattle Tacoma International Airport · Seattle, 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 YEC
Near SEA
- RNT · Renton Municipal Airport5 mi away
- BFI · Boeing Field King County International Airport6 mi away
- TIW · Tacoma Narrows Airport18 mi away
- PWT · Bremerton National Airport21 mi away
Frequently asked questions
How far is YEC from SEA?
The flight distance from Yechon (YEC) to Seattle (SEA) is 5,178 miles (8,333 km, 4,500 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from YEC to SEA?
A nonstop flight takes about 10h 37m 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 Yechon and Seattle?
Seattle is 16 hours behind Yechon.
What is the cheapest way to fly from YEC to SEA?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on YEC–SEA that never appear on search engines, with no booking fees.