Seattle → Seoul flights

Seattle–Seoul: Target $427–$436 for the best fares

Key takeaways

• Median fare is $436, based on 17 daily snapshots of the cheapest cached fares on this route.
• Bottom 25% of fares came in at $427 or below — a narrow $9 gap from the median, signaling prices cluster heavily at the low end.
• The high end reached $552, a 29% spread from low to high — meaningful enough to reward patience or punish last-minute booking.
• P25 and median are nearly identical ($427 vs. $436), suggesting the 'good' fare zone is common rather than rare when it appears.
• Sample size is 17 days — below 30, so treat patterns as directional rather than definitive.

30-day price trend

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

The full picture

The SEA–ICN fare landscape over this snapshot window is characterized by a tight cluster at the low end and an occasional spike toward $552. With the 25th percentile at $427 and the median at $436, the data suggests that on most days when competitive fares surface, they land within that narrow $427–$436 band. The $116 gap between the floor and the ceiling (a 29% spread) is wide enough to matter — a traveler who books during a spike pays roughly 29% more than one who catches the low — but the good news is the low end appears frequently.

In practical terms, this distribution implies that waiting for the absolute floor is unlikely to cost you much additional patience: fares seem to settle near $427–$436 with some regularity, rather than hovering closer to $552 and only occasionally dipping. As a general principle on transpacific routes, fares tend to soften in the 6–10 week booking window before departure, with last-minute availability tightening sharply. Nothing in this specific dataset contradicts that pattern, but the data doesn't resolve which weeks are best — only that the low-end cluster is accessible.

No dominant carrier is identifiable from this data, so carrier-specific booking tips aren't warranted here. One honest caveat: 17 snapshots is a thinner sample than the 30 days we'd prefer, which means short-lived promotions or a single outlier (the $552 high) can distort the picture. Treat the $427–$436 range as a reasonable target, check fares regularly, and consider setting a price alert at or below $436 rather than waiting for a lower number that the data doesn't reliably support.

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