San Diego (SAN) to Barcelona (BCN): 6,029 miles (9,702 km) great-circle, about 12h 35m nonstop by our estimate. Cheapest fare observed: $869 round-trip on Air Canada, with 1 stop, departing May 24, 2026.
$869 round-trip, Air Canada AC512, departing 2026-05-24 at 07:00, returning 2026-06-01. The recorded itinerary left on a Sunday, returning on a Monday 8 nights later; the fare was observed 29 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $869, it ranked 29th of the 30 round-trip fares we recorded from SAN (median $279). That is 14.4 cents per great-circle mile (round-trip price over one-way distance), close to the SAN median of 15.0 cents across 30 round-trip routes.
Routes from SAN of similar length: Moscow (6,127 mi) at $1670 and Madrid (5,842 mi) at $770.
SAN to BCN is the only one of 30 SAN routes where Air Canada priced cheapest. It is the 3rd longest of the 30 routes we track from SAN.
Of 57 departure airports with a fare to Barcelona, San Diego (SAN) ranked 46th at $869. Lowest: $44 from Milan (MXP); highest: $1401 from Brisbane (BNE); 28 nonstop. Cheapest-fare airlines (routes): Vueling (11), Wizz Air (10), Ryanair (8), Air Canada (4), Air Europa (3) and Wizz Air Malta (3), plus 18 more.
That depends on your passport and trip, so check the official source for Spain: European Commission: Schengen visa policy. Connecting elsewhere? Check that country's transit rules too.
Travelpayouts fares (cheapest per route, observed April 25, 2026); OurAirports coordinates and elevations; IANA zones America/Los_Angeles, Europe/Madrid; flight time is our estimate.