Seattle → Seoul flights

Budget $420 for Seattle–Seoul — floor is closer to $370

Key takeaways

• Median fare is $420 across 30 daily snapshots of the cheapest available cached fares on this route.
• The practical floor is ~$368–$369 (low and 25th percentile align tightly), meaning genuine bargains cluster around that level rather than well below it.
• Top-quartile fares reach $465–$499, so waiting too long risks paying 10–20% above median.
• A 36% spread between low and high indicates meaningful price volatility — worthwhile to monitor fares over several weeks rather than booking the first price you see.
• No single carrier dominated the low-fare snapshots in this dataset, so comparing across carriers at the time of booking is advisable.

30-day price trend

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

The full picture

The Seattle-to-Seoul market shows a median economy fare of $420, with the bottom quartile sitting at $369 — almost identical to the observed 30-day low of $368. That tight clustering at the floor tells you something useful: the cheapest fares on this route aren't rare one-day flukes. They appear with enough regularity that a patient shopper has a reasonable shot at landing near that level. The upper end of the range, however, climbs to $499, meaning the difference between a well-timed and a poorly-timed purchase is roughly $130 — real money on a transpacific ticket.

With a 36% spread between low and high, this route has enough volatility to reward monitoring. A practical approach is to track fares 6–10 weeks before your intended departure. Transpacific routes — especially those with multiple carriers competing — tend to see fare adjustments as airlines balance load factors. If you see a price at or below $390, the data suggest you're in the bottom quartile and should consider locking it in. Holding out for something dramatically below $368 is unlikely to pay off based on the 30 snapshots captured here.

The dataset does not surface a clear dominant carrier at the low end, so it's worth checking major transpacific operators on this routing at the same time rather than anchoring to one airline's site. One honest caveat: 30 snapshots capture a single rolling window of cached fares and may not reflect seasonal demand spikes — particularly around Korean national holidays or peak summer travel — when the floor and median can both shift upward considerably. If your travel falls near a holiday period, the $368–$420 range may be optimistic.

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