RT Nonstop Flights: Boston, MA (BOS) to/from San Diego, CA (SAN) $137 (Travel Dec '26 - March '27)
at Southwest Airlines
Nonstop round-trip flights from Boston to San Diego from $137, or $68.50 per person with Southwest Companion Pass.
Southwest Airlines nonstop round-trip fares from Boston (BOS) to San Diego on select dates in December, January, February, and March. Travel dates include Dec 4-16; Jan 15; Feb 4-5, 8, 18-19, 22, 25-26; and March 1, 4-5, 8. If you hold a Southwest Promotional Companion Pass valid for January–March 2027, you can bring a companion for the price of one ticket, effectively splitting the cost to $68.50 per person.
FAQ
What dates are available for these $137 fares?
December 4–16; January 15; February 4–5, 8, 18–19, 22, 25–26; and March 1, 4–5, 8.
How can I get the $68.50 per-person price?
You need a Southwest Promotional Companion Pass valid for January–March 2027. With this pass, your companion travels free, splitting the $137 fare between two passengers.
Are these nonstop flights?
Yes, all fares are for nonstop round-trip travel between Boston and San Diego.
