Cheap flights from Seattle to Barcelona from C$ 797

The cheapest month to fly to Barcelona-El Prat Airport from Seattle is in January. Flight prices, which tend to average around C$ 678, are often lower during this time because this is during the off-season. If you are unable to visit Barcelona-El Prat Airport during the month of January, then departing from Seattle during the month February is also very affordable. Most momondo users find prices during this month for around C$ 687.

You are more likely to see cheaper flights to Barcelona-El Prat Airport from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Barcelona-El Prat Airport for around C$ 1,186 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Barcelona-El Prat Airport from Seattle for as low as C$ 1,068 on momondo.

You could potentially save up to 18% on your flight if you consider stops on a Seattle to Barcelona-El Prat Airport flight.

As of November 2026, prices for Seattle to Barcelona-El Prat Airport flights are approximately 7% more expensive when compared to flights at the same time last year.

Historically, on average around 8% of flights between Seattle and Barcelona have experienced a delay on any given week. The average delay length over the past 12 months has been 192 minutes.

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights departing in the early afternoon have, in the past, seen delays more frequently in comparison.

Saturday is statistically the day of the week that experiences the fewest delays on this flight route. Tuesday has historically seen more delays on average compared to the rest of the week.

According to our data, Delta has had the least delays on this route over the last 12 months, with about 8% of their flights experiencing any sort of delay.