Seattle → Tokyo flights

Seattle–Tokyo fares center at $380 — budget $361–382 realistically

Key takeaways

• $380 is the median cheapest fare across 30 daily snapshots — a reliable planning anchor for this route.
• The interquartile range is narrow: $361–$382 — meaning most days the cheapest available fare sits within a tight $21 band.
• The floor was $316 across the sample window, suggesting genuine deals exist but are uncommon outliers, not the norm.
• At 31% spread between low and high ($316–$413), meaningful price variation exists — monitoring fares over several weeks is worth the effort.
• The $361 p25 threshold is a credible target: roughly one in four snapshots showed fares at or below that level.

30-day price trend

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

The full picture

Seattle–Tokyo is a competitive transpacific route, and the 30-day fare snapshot reflects that: a median of $380 with three-quarters of observations falling between $361 and $382. That compressed interquartile range tells you something important — on most days, the cheapest available fare doesn't vary wildly. If you see anything at or below $361, that's a genuinely below-typical price worth acting on. The floor of $316 shows those fares do occasionally surface, but at roughly $64 below median, they represent the exception rather than a reliable target to wait for.

The 31% spread between the lowest and highest observed fares ($316 to $413) is meaningful enough to reward some patience, but not so dramatic that holding out for a massive drop is a sound strategy. On a route of this distance, fares tend to be most accessible in two windows: roughly 8–12 weeks before departure, when carriers are still filling inventory and haven't yet tightened yield controls, and occasionally in the final 10–14 days if loads are soft — though the latter is a gamble on a popular transpacific corridor. For most travelers, targeting the 6–10 week advance-purchase window and setting a fare alert at $361 or below is a grounded approach.

No dominant carrier signal is visible in this dataset, so routing and airline preference should come down to schedule fit and loyalty considerations rather than a clear price leader. One honest caveat: 30 daily snapshots capture a single rolling window of cached fares and may not reflect seasonal demand shifts — particularly elevated pricing around Japanese holidays (Golden Week in late April–early May, and the Obon period in mid-August). If your travel dates fall near those periods, treat the $380 median as an optimistic baseline rather than an expected price.

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