How long does it take to fly from NYC to Seoul s Korea?

No airlines fly direct between Seattle (SEA) and Auckland (AKL), so you will have to transfer somewhere, adding to travel time. The fastest route is via San Francisco (SFO), which has a total flight time of 15 hours and 10 minutes (2hrs 10mins from SEA to SFO, 13hrs from SFO to AKL). Flight time via Vancouver is 15hrs 15mins; via LAX is 15hrs 40mins.