Great-circle route SEA ↔ NRT. Faint dots are other airports, for geographic context. Download this map — free to reuse with a link back to this page.
Frequencies below are per direction, from our most recent schedule sample. The two directions are not identical — that is normal on scheduled routes.
| Direction | Frequency | Days | Airlines |
|---|---|---|---|
| SEA → NRT Seattle to Tokyo |
12/wk | Daily | Alaska Airlines, Japan Airlines |
| NRT → SEA Tokyo to Seattle |
14/wk | Daily | Alaska Airlines, Japan Airlines, Japan Airlines Domestic |
Where a direction shows “—” we track it as an operating nonstop but hold no schedule sample for it — we would rather show nothing than guess.
In 2025, airlines reported 226,293 passengers on 1,192 flights between SEA and NRT — about 620 a day — filling 84% of the 270,851 seats flown. Japan Air Lines Co. Ltd. carried the most passengers (56%).
Source: US DOT T-100 segment reports — actual airline-reported traffic, scheduled service only, both directions combined. Cargo and charter flights excluded.
3 airlines fly the SEA–NRT nonstop, including Alaska Airlines, Japan Airlines, Japan Airlines Domestic.
Recent scheduled departures on this route have used the Boeing 787-9, Airbus A330-200.
Aircraft assignments change by season and by time of day.
On a long east–west route like this one the two directions do not take the same time. Aircraft flying eastbound ride the mid-latitude jet stream and typically arrive earlier than the westbound leg, which flies into it. The difference is commonly 30 to 90 minutes on transatlantic and transpacific flights, and it varies by season. The estimate above does not model wind — treat it as a midpoint and check the airline's own timetable for the block time on your date.
The distance between Seattle Tacoma International Airport and Narita International Airport is 4,757 miles, or 7,656 kilometres.
| Great-circle distance | 4,757 mi |
| Kilometres | 7,656 km |
| Nautical miles | 4,134 nmi |
Measured airport to airport. The actual track is longer — aircraft follow airways, avoid restricted airspace and route around weather.
Yes. 3 airlines fly the route nonstop, with about 26 departures a week across both directions. The route is in our live nonstop dataset, last seeded 2026-07-07.
About 9h 40m in the air. That is a great-circle estimate from the 4,757-mile distance, not a scheduled block time — an airline's published time will differ by roughly 15 to 45 minutes depending on routing, winds and taxi.
About 12 a week from Seattle to Tokyo and 14 a week from Tokyo to Seattle, from our most recent schedule sample.
Alaska Airlines, Japan Airlines, Japan Airlines Domestic.
In 2025, airlines reported 226,293 passengers on 1,192 scheduled flights between SEA and NRT — about 620 a day — filling 84% of the seats flown. Source: US DOT T-100 segment reports, both directions combined.
Recent scheduled departures have used the Boeing 787-9, Airbus A330-200. Assignments change by season and by time of day.
