New York → Seoul flights

JFK–Seoul fares are locked near $425 — book anytime with confidence

Key takeaways

• Median fare is $425, with the middle 50% of observed prices falling between $423 and $425 — an unusually tight band.
• The full 30-day price range spans just $17 ($419 low to $436 high), a spread of only 4%.
• A 4% spread is well below the 15% threshold where timing your booking meaningfully affects price — urgency here is low.
• The $419 floor is achievable but rare; most shoppers will realistically land at or just above $423.
• With 30 daily samples, the data is statistically solid — this is a genuine pattern, not a thin-sample anomaly.

30-day price trend

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

The full picture

The JFK–Seoul fare environment is about as stable as long-haul international routes get. Over 30 consecutive daily snapshots of the cheapest available cached fares, prices moved in a range of just $17 — from $419 to $436 — with a median of $425. The interquartile range is even tighter: $423 to $425. A spread of 4% means the difference between the best price observed and the worst is roughly the cost of an airport sandwich. That's not a pricing landscape that rewards obsessive monitoring.

For most travelers, the practical takeaway is straightforward: if you see a fare at or below $425, it reflects the going market rate and you're not leaving meaningful money on the table by booking now. The $419 low did appear in the dataset, so slight dips are real — but at only $6 below the p25 of $423, chasing that floor is unlikely to be worth the wait or the risk of fares moving in the other direction. There is no visible booking-horizon pattern in this data — no evidence that prices reliably soften 6 weeks out versus 10 weeks out, for example — which is consistent with a carrier or route maintaining disciplined yield management.

One honest caveat: this dataset captures a 30-day snapshot of cached fares for the cheapest available option on any given day. It does not distinguish by departure date, travel season, or specific airline, so underlying variation tied to peak travel periods (summer departures, Korean holidays, New Year) may be averaged out. If your travel dates fall around a major holiday, treat the $425 median as a baseline rather than a guarantee — and check fares specific to your window rather than relying on this aggregate.

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