Another summer fare deal today is San Francisco to Barcelona with Star Alliance airlines around $470 round trip. This one might not be around long. Yesterday Oneworld Airlines offered these sub-$500 fares. This morning it is Star Alliance with the lower fares to Barcelona for departures into early July and Oneworld fares have increased to low $500s.
Latest July return date from Barcelona to SFO I found at these low fares is July 12.
One similarity between low fares with both alliances is these ticket prices show up on Google Flights, but no direct booking links. Online travel agencies have these low fares through Momondo.com and Skyscanner.com.
Lufthansa San Francisco SFO – Munich MUC – Barcelona BCN – Washington IAD – SFO
A 50-minute transit stop in Munich makes it likely that you will miss the connecting flight in Munich for Barcelona. At this same fare you can book a 20-hour Munich layover, however, you have to catch a 6:30am flight the next morning.
Low Oneworld Alliance fares yesterday focused on Finnair flights SFO-HEL. These ticket prices went up today, but still in the $530-$560 range for summer dates.
HOP2.com online travel agency American Airlines/Oneworld codeshares
San Francisco SFO – Chicago ORD- Barcelona BCN – Chicago ORD – SFO