San Francisco → Osaka flights

SFO–Osaka fares cluster near $618 — act when you see sub-$550

Key takeaways

• Median fare is $618, with the middle 50% of observations falling between $611 and $619 — an unusually tight band.
• The lowest recorded fare was $454, roughly 27% below the median, but it appears to be an outlier rather than a reliable floor.
• Spread is 37% (low to high), but that figure is driven almost entirely by the single $454 data point — most fares are bunched within $8 of each other.
• With only 17 daily snapshots, this dataset is thinner than ideal; treat these figures as directional, not definitive.
• No dominant carrier pattern is visible in the data, so comparison-shopping across all nonstop and one-stop options is especially important here.

30-day price trend

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

The full picture

The fare landscape for San Francisco to Osaka Kansai (KIX) is striking for how little it moves. The interquartile range — the spread between the 25th and 75th percentile — is just $8, from $611 to $619. That means on roughly half of the days sampled, the cheapest available fare was essentially identical. For travelers, this signals a market where airlines are holding firm on their base pricing: don't expect a routine midweek browse to turn up dramatically lower fares than you saw last week.

The $454 low-end outlier is the one genuinely interesting data point. At 27% below the median, it represents real savings if you happen to catch it — but with only 17 samples in the dataset, there's no way to know whether it reflects a predictable sale window, a brief seat-dump, or a one-off promotional fare. The honest interpretation is: if you see anything convincingly below $550, treat it as a meaningful opportunity and book it rather than waiting to see if it goes lower. The tight clustering of the remaining fares suggests it likely will not.

Because carrier-level data isn't broken out here, it's worth running parallel searches across booking platforms and checking both nonstop options (United and ANA serve this corridor) and one-stop itineraries through hubs like Tokyo or Seoul, which can occasionally undercut direct pricing. Timing your search 6–10 weeks ahead of departure is a reasonable starting point for transpacific routes historically, though this dataset doesn't capture booking-horizon variation directly. One honest caveat: 17 days of snapshots is a thin basis for strong conclusions — if you have flexibility, continue monitoring for 1–2 weeks before committing, particularly if fares are sitting at the $618 cluster rather than near that $454 floor.

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