San Francisco → Osaka flights

SFO→KIX fares cluster tight — target the $453–$458 floor

Key takeaways

• Median fare is $470 across 30 daily snapshots — a reliable anchor for budgeting.
• The full observed range runs just $453 to $496, a spread of only 9% — unusually compressed for a transpacific route.
• Bottom-quartile fares (p25) sit at $458, meaning roughly one in four snapshots showed pricing at or below that level.
• The p75 is $471, so three-quarters of observed fares fell within a tight $13 band ($458–$471) — timing provides little advantage here.
• Given the narrow spread, avoiding the $480–$496 high end matters more than chasing a specific booking day.

30-day price trend

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

The full picture

Thirty daily snapshots of the cheapest cached fares on SFO–KIX tell a straightforward story: this is a remarkably stable-priced route. The $453 floor and $496 ceiling are separated by just 9% — well below the 20–30% spreads common on long-haul international itineraries. That compression means the dramatic "book now vs. wait" calculus that applies to volatile routes is largely absent here. Your realistic target is somewhere in the $453–$471 band, which captures the bottom half of all observed pricing.

Because the interquartile range is only $13 wide ($458 at p25 to $471 at p75), the data does not support a strong claim that booking further in advance — or at any particular point in a booking window — reliably unlocks materially lower fares on this route. The more actionable guidance is threshold-based: if you see a fare at or below $458, that places you in the bottom quartile of the observed distribution and represents a genuinely good outcome relative to the data. Fares above $480 are in the top quartile and worth waiting out if your travel dates have flexibility.

No dominant carrier pattern is distinguishable from this dataset, so carrier-specific booking tactics aren't warranted here. One honest caveat: 30 snapshots reflect cached fares during a specific 30-day window and may not capture seasonal demand spikes — such as cherry blossom season or Golden Week — when transpacific fares to Osaka can behave very differently. If your travel falls near a Japanese public holiday cluster, treat the upper end of this range as a floor, not a ceiling.

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