Cheap flights from Seattle to Barcelona from C$ 378

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$ 686.

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$ 1,094 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$ 1,041 on momondo.

You could potentially save up to 36% on your flight if you consider stops on a Seattle to Barcelona-El Prat Airport flight.

As of June 2026, prices for Seattle to Barcelona-El Prat Airport flights are approximately 2% more expensive when compared to flights at the same time last year.

Historically, on average around 25% 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 153 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.

As of June 2026, there are 1 flights per day flying from Seattle to Barcelona-El Prat Airport. The most common time of day flights depart is 3:00p.m., with 100% of flights taking off in the afternoon.

The number of flights available between Seattle and Barcelona-El Prat Airport is 9 per week as of June 2026. The most frequent departure day is Tue, with 33% of weekly flights leaving on this day.