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Seattle → Barcelona flights

Seattle to Barcelona fares have a $285 median over 12 snapshots; the bottom quartile sits near $270, so track prices before booking.

Seattle–Barcelona fares hover near $285, but data's thin

Key takeaways

Median fare of $285 across the sampled window, a reasonable baseline for budgeting this route
Bottom quartile (p25 of $270) suggests fares near $270 aren't rare outliers — they show up fairly regularly
Spread of 44% between low ($252) and high ($364) means timing can meaningfully affect what you pay
Top quartile fares (p75 of $329) show prices can climb well above median if you book during pricier windows
Only 12 snapshots collected — enough to see a range, not enough to call seasonal patterns with confidence

30-day price trend

SEA → BCN · cheapest cached fare per day · last 13 days · ↑ 25%

$252 low$364 high

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

The full picture

The Seattle to Barcelona route shows a median fare of $285 across our 12-day sample, with prices ranging from a low of $252 to a high of $364. That's a 44% spread, which is wide enough to suggest real price volatility — this isn't a route where fares sit flat day after day. The bottom quartile (p25 of $270) and top quartile (p75 of $329) give a clearer picture: a meaningful share of observed fares land in the $270–$329 band, so treat the $364 high as an edge case rather than the norm.

With only 12 snapshots, we can't responsibly make claims about which part of the booking horizon tends to soften first — that requires a longer rolling window to separate genuine trends from day-to-day noise. What we can say is that fares near or below the $270 p25 mark have appeared in this sample, so if you see something in that range, it's consistent with the better end of what's been observed rather than a fluke. If you're quoted something close to $360, it's worth waiting or checking alternate dates, since that sits well above both the median and the p75 line.

No dominant carrier was identifiable from the data provided, so we can't speak to airline-specific pricing behavior on this route. The honest takeaway: this is a moderately volatile transatlantic route with a $285 anchor point, but our sample size is thin enough that we'd caution against over-reading any single snapshot — more data would sharpen this picture considerably.

Ready to look at fares?

Search SEA → BCN on Aviasales →See the price history →

Related travel pages

Why we regenerated this article: Top quartile ↑ 15% ($285 → $329). 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 Oct 10, 2026. Fares shift continuously — confirm at booking.