Cheap flights from San Francisco to Barcelona from $427

The month of February is, on average, the cheapest month to fly to Barcelona from San Francisco, with most prices found around $360. If you don’t want to visit Barcelona in February, then you should wait until January to fly from San Francisco, when ticket prices are also cheap, with an average price of $360.

The cheapest day to depart from San Francisco to Barcelona is on a Saturday when prices can be found for as low as $772. On the other hand, Friday is the most expensive day to depart from San Francisco because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $999.

In the evening is the cheapest time of day to fly from San Francisco to Barcelona when you can find flight prices for as low as $726. Flying to Barcelona in the evening is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $896 on average. Flights to Barcelona from San Francisco in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

Fly from San Francisco to Barcelona-El Prat for the best San Francisco - Barcelona flight prices

You are more likely to see cheaper flights to Barcelona from San Francisco when booking weeks ahead of your departure date. In general, you can expect to find flights to Barcelona for around $735 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Barcelona from San Francisco for as low as $675 on momondo.

There are 3 cabin classes available to choose from on San Francisco to Barcelona flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

WestJet, British Airways, and TAP AIR PORTUGAL are the most popular carriers operating from San Francisco to Barcelona

United Airlines, Iberia and TAP AIR PORTUGAL are the top three most popular airlines that fly to Barcelona from San Francisco according to our data. United Airlines is the first choice among our users, with 62% of people opting to fly with this airline when traveling to Barcelona. Keep in mind that there are 19 different airlines that fly to Barcelona on a routine basis, so you have a few additional options to choose from.

Historically, on average around 16% of flights between San Francisco and Barcelona have experienced a delay on any given week. The average delay length over the past 12 months has been 169 minutes.

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

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

According to our data, LEVEL have had the least number of delays on this route over the last 12 months; with about 13% of their flights experiencing any sort of delay.

The number of flights available between San Francisco and Barcelona is 3 per day as of June 2026. The most frequent departure time is 6:00PM, with 100% of daily flights leaving in the evening.

As of June 2026, there are 21 flights per week flying from San Francisco to Barcelona. The most common day of the week flights depart is Mon, with 14% of flights taking off on this day.