May is the cheapest month to fly this route, with average fares around $855 round trip.
Average round-trip fares by departure month, based on current availability.
| Month | Avg Price | Lowest | Relative Cost | |
|---|---|---|---|---|
| May 2026 | $855 | $730 | Best | |
| June 2026 | $1011 | $860 | Peak | |
| July 2026 | $972 | $872 | ||
| August 2026 | $885 | $848 |
Departing on Tuesday offers the lowest average fares at $921. Friday departures are the most expensive at $1029, a difference of $108.
The best time to fly is May. Set up an alert and we'll notify you when prices drop.
Get Started Free →The cheapest month to fly from San Francisco to Barcelona is May, with average round-trip fares around $855. The lowest fare found in May is $730.
Tuesday departures are the cheapest, averaging $921 round trip. The most expensive day is Friday at $1029.
Based on current pricing trends, booking for May travel offers the best value. Avoid June if possible, as fares average $1011 compared to $855 in the cheapest month. July is a solid middle-ground option at $972.
Flying in May instead of June can save you approximately $156 per round trip. The cheapest month averages $855 while the most expensive averages $1011.
Airlines, flight times, price calendar, and more for San Francisco to Barcelona
View SFO → BCN Details