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Seattle to Seoul fares over the last 30 days show a $418 median; most fares sit $394–$428, but occasional fares drop much lower.
Written from this route's 30-day price index (30 daily samples). Article last regenerated Nov 7, 2026.
See full numbers and stats on the SEA → ICN price history page.
The data shows a route where typical pricing is fairly predictable — a $394 to $428 middle-half range around a $418 median — but the extremes tell a different story. A low of $236 against a high of $477 produces a 102% spread, meaning the cheapest fare seen was less than half the most expensive one. That gap suggests that while most days quote something close to the median, a small number of fares break sharply from the pattern, likely tied to specific flight dates, fare sales, or booking-class availability rather than steady day-to-day drift.
With all 30 days in the window showing a cached fare, this is a well-sampled route, which makes the clustering around $418 meaningfully reliable. The tight p25–p75 band indicates that travelers booking on a typical day should expect to land near that median rather than at either extreme. The $236 low is worth noting as a real data point, not noise, but it represents the bottom of the distribution rather than a realistic expectation — a quarter of fares were at or below $394, and the $236 fare sits well under even that threshold, suggesting it was a rare opportunity rather than a recurring pattern.
The data doesn't break out specific days of the week or a dominant carrier, so no claims can be made about which departure days or airlines drive the lower fares. Travelers watching this route should treat $394–$428 as the realistic planning range and understand that a notably cheaper fare, while possible, isn't something to count on. The honest caveat: with a 102% spread, median alone understates the volatility, and anyone with flexible dates may want to track fares over several weeks rather than book at the first quote near $418.
Why we regenerated this article: Price spread tightened by 10 points. 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 Nov 7, 2026. Fares shift continuously — confirm at booking.