Seattle → Reykjavík flights

Median SEA–KEF fare is $448 — bottom quartile dips near $369

Key takeaways

• $448 median fare across 29 daily snapshots — treat this as your benchmark price.
• Bottom quartile fares land at or below $369, worth waiting for if your dates are flexible.
• Top quartile prices climb to $489+, nearing the observed high of $495.
• A 53% spread between low and high means timing genuinely matters on this route.
• Sample covers 29 days of cached fares — a solid single-month read, not a multi-season trend.

30-day price trend

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

The full picture

The SEA–KEF route shows real price variability: fares in our 29-day sample ranged from $323 to $495, a 53% spread that puts this route firmly in the 'timing matters' category rather than the 'book whenever' one. The median of $448 is a reasonable planning benchmark, but the bottom quartile — fares at $369 or below — shows that meaningfully cheaper fares do surface with some regularity, not just as rare flukes.

We can't respond to specific dates that fall outside our capture window, and we won't claim there's a magic booking day — that's not supported by this kind of snapshot data. What the numbers do support is a general strategy: if you see a fare in the $360–$400 range, that's already in the bottom quartile of what this route has shown recently, and it's reasonable to book rather than gamble on it dropping further. Fares creeping above $470 put you in top-quartile territory, where waiting or checking alternate dates may pay off, assuming your travel dates have any flexibility.

One honest caveat: this dataset doesn't show us carrier-level detail or day-of-week patterns for this route, so we can't respond to airline-specific behavior or weekday-vs-weekend booking claims here. The 29-day window is also a single snapshot in time — it tells you about recent pricing behavior, not necessarily how fares will trend heading into a different season or a longer booking horizon. Use the $369–$489 range as your working corridor, and treat anything notably below $369 as a genuinely good fare worth acting on.

Ready to look at fares?

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