San Diego (SAN) to Nashville (BNA): 1,747 miles (2,812 km) great-circle, about 4h 00m nonstop by our estimate. Cheapest fare observed: $358 round-trip on Frontier, with 1 stop, departing June 18, 2026.
$358 round-trip, Frontier F91326, departing 2026-06-18 at 20:29, returning 2026-06-21. The recorded itinerary left on a Thursday, returning on a Sunday 3 nights later; the fare was observed 54 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $358, it ranked 20th of the 30 round-trip fares we recorded from SAN (median $279). That is 20.5 cents per great-circle mile (round-trip price over one-way distance), above the SAN median of 15.0 cents across 30 round-trip routes.
Routes from SAN of similar length: Chicago (1,720 mi) at $270 and Atlanta (1,888 mi) at $281.
Frontier had the cheapest fare on 16 of 30 SAN routes. It is the 17th longest of the 30 routes we track from SAN.
Of 9 departure airports with a fare to Nashville, San Diego (SAN) ranked 8th at $358. Lowest: $134 from Fort Lauderdale (FLL); highest: $430 from Punta Cana (PUJ); 1 nonstop. Cheapest-fare airlines (routes): Frontier (5), Spirit (2), Arajet (1) and WestJet (1).
Travelpayouts fares (cheapest per route, observed April 25, 2026); OurAirports coordinates and elevations; IANA zones America/Los_Angeles, America/Chicago; flight time is our estimate.