Barcelona
If you’re looking for cheap flights from San Francisco to Barcelona, United Airlines is your best bet. They offer a direct flight that takes about 8 hours and 45 minutes, which means less time spent in the air and more time enjoying yourself in Spain! JetBlue also has some great deals on tickets to Barcelona from San Francisco; however, these flights will require an overnight stay at one of their stops along the way (such as New York City).
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