There are most likely no direct flights on the Boston — San Diego route
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A non-stop flight is the most convenient and comfortable way to fly from Boston to San Diego, despite the fact that sometimes flights with transfers can cost significantly less.
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Answers to questions about the route that travelers are most interested in.
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There are most likely no direct flights on the Boston — San Diego route
Boston — San Diego
07/26/2026
Departure
Direct flight
WN2640
starting at $962
Boston — San Diego
06/23/2026
Departure
Direct flight
AS389
starting at $458
Boston — San Diego
08/01/2026
Departure
Direct flight
B6219
starting at $417
starting at $962
starting at $458
starting at $207
starting at $173
The route Boston — San Diego is served by many carriers — 4 in total, including Southwest Airlines, Alaska Airlines, JetBlue Airways, and American Airlines. This gives passengers wide opportunities: from finding the lowest fare (from $173) to selecting flights by schedule or service class. Our service aggregates data from multiple booking systems so you can compare offers in one place. This saves time and money: no need to check dozens of sites — just pick the right option and book online.
The cheapest one-way flight from Boston to San Diego departs on 06/23/2026, is operated by American Airlines and costs $173
There is no information about the cheapest roundtrip flight from Boston to San Diego
Fastest flight from Boston to San Diego takes 8h 43m
There are direct flights on this route 3 days a week: Su, Tu, and Sa
The distance between Boston and San Diego is 4149km (2572 miles). The time difference between Boston and San Diego is 3h
The cheapest flight ticket from Boston to San Diego according to data for the last 48 hours costs $173
Often the best time to buy tickets from Boston to San Diego is 2 months before departure.
Based on statistics over the past years, the lowest prices for flights from Boston to San Diego can be found flying in these months: June, August, July.
The fastest flights from Boston to San Diego start from 8 hours 43 minutes in the air.
The following airlines operate direct flights on the route Boston — San Diego: Southwest Airlines, Alaska Airlines, JetBlue Airways
In different months, ticket prices from Boston to San Diego vary: minimum — $173 (June 2026), maximum — $207 (July 2026). Typically, the flight costs $195–$411.
On the Boston — San Diego route, ticket prices are stable. Whichever month you choose, the difference will be minimal.
There is a slight difference: it's a bit cheaper in June 2026–July 2026 (averaging $190) and slightly more in July 2026–August 2026 ($205). But overall, the difference is small.
On this route, you don't need to target specific months — prices are stable. The difference between the cheapest and most expensive period is only 8%. Book whenever it's convenient.
Monthly price variation is just 7.9%. Ticket costs on this route are among the most predictable.
We couldn't find any special offers for flights from Boston to San Diego