Roundtrip Flights from Seattle, WA (SEA) to Tokyo, Japan (NRT) $596.25 (Travel Dec - March 2026)

Roundtrip Flights from Seattle, WA (SEA) to Tokyo, Japan (NRT) $597.25 (Travel Dec - March 2026). Asiana Airlines via Booking.com have round trip airfares travelling from Seattle (SEA) to Tokyo Japan (NRT) for $597, making 1 stop in Seoul, Korea both ways. Stopovers range from 3-24 hours depending on the flight you choose. Make it 2 trips in 1 and spend a day in Seoul. You may have a personal item, a carry-on bag and 2 free checked bags. Changes or cancellations are allowed with a fee. Travel Availability: Departs SEA: Dec 2-3; Jan 18-20, 22, 25-27; Feb 1-3, 16; March 1-3, 5, 8-10, 12, 15-17