United is selling cheap flights from Barcelona, Spain to San Francisco, United States for as low as €277 return! That works out to a cost of just 2.3 (Euro) Cents Per Mile for this 11900 mile journey.

The fare only includes carry-on luggage, so you need to pay extra if you want to check bags.

Our data shows the lowest prices are available in September 2021. See the link(s) below for dates and prices.

Sample date(s) with Kiwi.com booking link

Sep 1 – Sep 16 (€471)


Sep 6 – Sep 30 (€307)


Sep 14 – Sep 21 (€277)


Sep 14 – Sep 28 (€277)


Sep 17 – Sep 30 (€277)


Nov 8 – Nov 15 (€277)


Nov 11 – Nov 22 (€277)


Nov 18 – Nov 21 (€368)


Nov 18 – Nov 25 (€357)


Nov 21 – Nov 28 (€459)

Are you looking for an apartment to rent for your stay in San Francisco, United States? Check out what Vrbo.com has to offer!

We post many cheap flights like this one from Barcelona, Spain to San Francisco, United States every single day, so have a look at our Travel Deals page, or check out the related posts below!

Note: Prices are valid at the time of publishing this post, but may change in the future.

COVID-19 Note: During these uncertain times, please make sure to check the relevant Coronavirus restrictions for your destination before you book and before you fly. We recommend also checking the refund policy of the airline, as well as purchasing travel insurance for your trip.