---
title: "Seattle to Tokyo (SEA → HND): distance and flight time · Orbit"
description: "Seattle to Tokyo is 7,711 km (4,792 mi) great circle, an estimated 10h 05m in the air. The route, what it flies over, and why the short way is not the straight line on a map."
url: https://orbitflights.app/routes/sea-to-hnd
---

SEA → HND

# Seattle to Tokyo: distance, flight time and the route it really takes

Seattle–Tacoma to Tokyo Haneda is 7,711 km of great circle — 4,792 mi — and an estimated 10h 05m in the air. It crosses from North America to Asia.

**Great circle**
7,711 km
4,792 mi

**Estimated in the air**
10h 05m
block time

**Furthest from equator**
54.4°N
at 36% along

**One lap of Earth**
19.2%
of 40,075 km

Of the [292 routes catalogued here](https://orbitflights.app/routes), this is the 86th longest.

The Seattle to Tokyo route drawn as a great circle arc on a globe

## What the aircraft actually flies over

From Seattle the path crosses the United States, then 7,403 km of open water.

The furthest the great circle gets from the equator is 54.4°N, 36% of the way along.

Flying the line that looks straight on a Mercator map — one constant compass bearing — would cover 8,223 km. That is 511 km further, about 7% more, and roughly 38m of extra flying.

Leaving Seattle the aircraft points north-west (301°); it arrives into Tokyo heading south-west (226°). That is 75° of drift without a single turn — the compass moves because the path is a curve on a sphere, not because the aircraft does.

One economy seat on it is about 1.09 t of CO₂e each way, counting non-CO₂ warming.

[SEA–HND carbon footprint →](https://orbitflights.app/tools/flight-carbon-calculator?from=SEA&to=HND) [Map this route →](https://orbitflights.app/tools/flight-route-map?r=SEA-HND)

From

SEA

## Seattle–Tacoma

Seattle, United States · North America

47.4°N, 122.3°W

[SEA airport →](https://orbitflights.app/airports/sea) [Flights to Seattle →](https://orbitflights.app/flights-to/seattle)

To

HND

## Tokyo Haneda

Tokyo, Japan · Asia

35.5°N, 139.8°E

[HND airport →](https://orbitflights.app/airports/hnd) [Flights to Tokyo →](https://orbitflights.app/flights-to/tokyo)

## Seattle to Tokyo, asked and answered

**How far is Seattle to Tokyo?**
Seattle to Tokyo (SEA to HND) is 7,711 km, or 4,792 mi, measured as great circle distance between the two airports.

**How long is the flight from Seattle to Tokyo?**
About 10h 05m in the air. That is an estimate from the distance at a typical airliner block speed, plus half an hour for taxi, climb and descent; published schedules vary with winds and routing.

**What route does a Seattle to Tokyo flight take?**
The great circle passes over the United States, then 7,403 km of open water. It reaches 54.4°N at its furthest from the equator.

## Where these numbers come from

Distances are computed from the two airports’ own coordinates, not looked up from published routes. Times are estimates, not schedules.

[Why the shortest path is a curve →](https://orbitflights.app/blog/great-circle-routes-explained)

## Flown this one?

Orbit logs it in two taps and draws the arc on your own globe, along with every other flight you can remember. Free for your first 15.

[Download now](https://play.google.com/store/apps/details?id=com.qwertybit.orbit)

## Nearby routes

[LHR → SEA London to Seattle 7,702 km](https://orbitflights.app/routes/lhr-to-sea) [SYD → HND Sydney to Tokyo 7,818 km](https://orbitflights.app/routes/syd-to-hnd) [SFO → HND San Francisco to Tokyo 8,285 km](https://orbitflights.app/routes/sfo-to-hnd) [SEA → ICN Seattle to Seoul 8,373 km](https://orbitflights.app/routes/sea-to-icn) [LAX → HND Los Angeles to Tokyo 8,812 km](https://orbitflights.app/routes/lax-to-hnd) [HNL → HND Honolulu to Tokyo 6,191 km](https://orbitflights.app/routes/hnl-to-hnd)

## Further reading

[How many miles do you have to fly around the world?](https://orbitflights.app/blog/how-many-miles-to-fly-around-the-world) [What is on the exact opposite side of the world?](https://orbitflights.app/blog/opposite-side-of-the-world) [What's actually worth counting in a flight log](https://orbitflights.app/blog/what-is-worth-counting-in-a-flight-log)

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Markdown copy of https://orbitflights.app/routes/sea-to-hnd for language models and agents. Site index: https://orbitflights.app/llms.txt