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Seattle → Osaka flights

Median Seattle to Osaka fare is $429 across recent snapshots; most days price near that floor, so book once you see it.

Seattle–Osaka fares cluster near $429, with occasional spikes to $588

Key takeaways

$429 was the price on the vast majority of days sampled — both the median and the 25th-75th percentile range
$588 high appears to be an occasional outlier rather than the norm
37% spread looks wide, but it's driven by a small number of expensive days, not steady drift
Only 7 days of snapshots here — too thin to call this a reliable trend, just a snapshot
No carrier data available, so we can't speak to which airline is driving the $429 fare

30-day price trend

SEA → KIX · cheapest cached fare per day · last 7 days · → flat

$429 low$429 high

See full numbers and stats on the SEA → KIX price history page.

The full picture

The data shows a fairly tight cluster: $429 shows up as the median and also as both the 25th and 75th percentile, meaning most of the sampled days landed on exactly that fare. The $588 high is the exception, not the rule — it only shows up once or twice in the window, which is what's pushing the 37% spread figure higher than the day-to-day reality suggests. In practice, this route looks like it has a stable baseline fare with occasional price spikes rather than constant fluctuation.

With only 7 days of snapshots, we can't make confident claims about booking-window timing — there isn't enough history here to say whether prices soften further out or closer to departure. What we can say is that if you check this route and see something close to $429, that's consistent with the typical price, and paying meaningfully more (near $588) means you're on an above-average day for this route.

There's no visible carrier data in this sample, so we can't attribute the price floor to a specific airline or comment on carrier-driven patterns. The honest caveat: a 7-day sample is small, and a single route disruption, seasonal shift, or data gap could easily change this picture. Treat $429 as a useful reference point rather than a guaranteed price, and recheck closer to your travel dates since this snapshot window is short.

Ready to look at fares?

Search SEA → KIX on Aviasales →See the price history →

Related travel pages

Why we regenerated this article: Median fare ↓ 27% ($588 → $429). We only rewrite when the underlying price index actually moves — stable weeks keep the previous take.

AI-authored from this route's 30-day price index. Article last regenerated Oct 10, 2026. Fares shift continuously — confirm at booking.