San Diego (SAN) to Boston (BOS): 2,582 miles (4,156 km) great-circle, about 5h 40m nonstop by our estimate. Cheapest fare observed: $236 round-trip on American Airlines, with 1 stop, departing May 13, 2026.
$236 round-trip, American Airlines AA2720, departing 2026-05-13 at 12:03, returning 2026-05-20. The recorded itinerary left on a Wednesday, returning on a Wednesday 7 nights later; the fare was observed 18 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $236, it ranked 12th of the 30 round-trip fares we recorded from SAN (median $279). That is 9.1 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: Honolulu (2,610 mi) at $390 and Maui (2,538 mi) at $523.
American Airlines had the cheapest fare on 2 of 30 SAN routes. It is the 9th longest of the 30 routes we track from SAN.
Of 22 departure airports with a fare to Boston, San Diego (SAN) ranked 7th at $236. Lowest: $101 from Fort Lauderdale (FLL); highest: $1271 from Nairobi (NBO); 5 nonstop. Cheapest-fare airlines (routes): American Airlines (6), Frontier (5), Spirit (4), Southwest (3), Avianca (1) and Brussels Airlines (1), plus 2 more.
Travelpayouts fares (cheapest per route, observed April 25, 2026); OurAirports coordinates and elevations; IANA zones America/Los_Angeles, America/New_York; flight time is our estimate.