San Diego (SAN) to Frankfurt (FRA): 5,827 miles (9,378 km) great-circle, about 12h 10m nonstop by our estimate. Cheapest fare observed: $683 round-trip on United Airlines, with 1 stop, departing May 5, 2026.
$683 round-trip, United Airlines UA9223, departing 2026-05-05 at 11:04, returning 2026-06-09. The recorded itinerary left on a Tuesday, returning on a Tuesday 35 nights later; the fare was observed 10 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $683, it ranked 25th of the 30 round-trip fares we recorded from SAN (median $279). That is 11.7 cents per great-circle mile (round-trip price over one-way distance), below the SAN median of 15.0 cents across 30 round-trip routes.
Routes from SAN of similar length: Madrid (5,842 mi) at $770 and Barcelona (6,029 mi) at $869.
United Airlines had the cheapest fare on 4 of 30 SAN routes. It is the 5th longest of the 30 routes we track from SAN.
Of 13 departure airports with a fare to Frankfurt, San Diego (SAN) ranked 6th at $683. Lowest: $43 from Vilnius (VNO); highest: $1506 from Guadalajara (GDL); 5 nonstop. Cheapest-fare airlines (routes): Air Baltic (2), United Airlines (2), Air Canada (1), Air Europa (1), Condor (1) and Croatia Airlines (1), plus 5 more.
That depends on your passport and trip, so check the official source for Germany: 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/Berlin; flight time is our estimate.