American Airlines Barcelona BCN oneworld alliance San Francisco SFO United Airlines

SFO to Barcelona $456-$543 AA/UA August 2017

American Airlines has low fares August at $534 round trip San Francisco to Barcelona. This price is offered beginning mid-April into May and late September into October. United Airlines tickets with Star Alliance partner airlines like Air Canada and Swiss are also priced from $530s to $570s for August travel.

I needed to play around with Google Flights dates to find dates actually pricing at fares shown on AA website. Many were $100 more and some many hundreds of dollars more. But testing several dates located some low fares in August directly bookable on United fares were easier to locate.

American Airlines San Francisco SFO – Philadelphia PHL – Barcelona BCN – Chicago ORD – San Francisco SFO

$542.36 round trip  Thu Aug 17 – Fri Aug 25

SFO-BCN $543 AA Aug17-25 search for same dates shows ticket

British Airways codeshare flights

SFO – Dublin – London LGW – Barcelona BCN – Chicago ORD – SFO

$456.46 round trip  Thu Aug 17 – Fri Aug 25

SFO-BCN $457-ota OW Aug17-25

United Airlines ticket  $537.86 round trip

SFO – Montreal YUL (Air Canada) – Barcelona BCN – Washington Dulles IAD (United) – SFO

Thu Aug 17 – Fri Aug 25

SFO-BCN $538 UA Aug17-25

Loyalty Traveler Airfare Deals