Seattle → Reykjavík flights

SEA–KEF fares are tight — expect to pay near $489

Key takeaways

• Median fare of $489 across 23 days of snapshots — a reliable baseline for budgeting
• Spread of only 10% between low and high ($448–$495), so timing matters less than usual on this route
• Bottom quartile fares sit at $448, meaning even patient shoppers shouldn't expect dramatic discounts
• Top quartile fares cap at $493, just below the observed high of $495 — this route holds a narrow band
• With 23 daily samples, the data window is reasonably solid but still short of a full seasonal picture

30-day price trend

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

The full picture

The SEA–KEF route shows unusually consistent pricing: over 23 days of snapshots, fares ranged from just $448 to $495 — a spread of only 10%. That's tight by airfare standards, and it tells us this route doesn't swing wildly based on when you check. If you see something near the $448–$460 range, that's genuinely toward the floor for this route; anything above $490 is toward the ceiling.

Because the spread is so narrow, there isn't strong evidence of a booking window that reliably softens prices — the kind of 60-day-out dip you might find on more volatile routes just isn't visible in this data. That said, the bottom quartile ($448) and median ($489) are close enough that waiting for a deal mostly means watching for the route to dip into that lower band rather than timing a specific week or month. Treat the median as your realistic expectation and the p25 figure as your target if you're willing to watch for a few days.

No dominant carrier or day-of-week pattern is visible in this dataset, so we can't make claims about specific airlines or weekday departures being cheaper — that kind of granularity isn't in the numbers we have. The honest takeaway: this is a low-volatility route where aggressive timing strategies are unlikely to pay off. Budget around $489, treat anything near $448 as a good find, and don't expect this particular city pair to reward hunting for an elusive 'best day.' One caveat worth flagging: 23 days is a decent sample but still short of a full seasonal cycle, so prices could behave differently during peak summer or holiday travel than what's captured here.

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