Cheap flights from Seattle to Barcelona from $177

The month of October is, on average, the cheapest month to fly to Barcelona from Seattle, with most prices found around $330. If you don’t want to visit Barcelona in October, then you should wait until January to fly from Seattle, when ticket prices are also cheap, with an average price of $351.

The cheapest day to depart from Seattle to Barcelona is on a Friday when prices can be found for as low as $920. On the other hand, Thursday is the most expensive day to depart from Seattle because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,216.

Fly from Seattle/Tacoma Intl to Barcelona-El Prat for the best Seattle/Tacoma Intl - Barcelona flight prices

You are more likely to see cheaper flights to Barcelona from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Barcelona for around $775 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Barcelona from Seattle for as low as $723 on momondo.

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 in the early afternoon have, in the past, seen delays more frequently in comparison.

The number of flights available between Seattle and Barcelona is 1 per day as of June 2026. The most frequent departure time is 3:00PM, with 100% of daily flights leaving in the afternoon.

9 flights are operational weekly from Seattle to Barcelona as of June 2026. The most popular departure day for this route is Tue, with 33% of flights per week taking off on this day.