Cheapest return flights from Boston to San Jose in December from $354

AirHint found the following cheapest return flights from Boston (BOS) to San Jose (SJO) in December 2025 (see full year).

Return flights

04 Dec - 09 Dec Spirit Airlines
13 Dec - 23 Dec Frontier Airlines
04 Dec - 15 Dec Spirit Airlines
04 Dec - 14 Dec Spirit Airlines
04 Dec - 23 Dec Spirit Airlines
02 Dec - 15 Dec Spirit Airlines
02 Dec - 14 Dec Spirit Airlines
01 Dec - 09 Dec Spirit Airlines
01 Dec - 15 Dec Spirit Airlines
01 Dec - 14 Dec Spirit Airlines
27 Dec - 04 Jan Copa
28 Dec - 11 Jan Spirit Airlines
28 Dec - 14 Jan Spirit Airlines
25 Dec - 14 Jan Spirit Airlines
27 Dec - 14 Jan Spirit Airlines
23 Dec - 01 Jan Spirit Airlines
23 Dec - 11 Jan Spirit Airlines
25 Dec - 11 Jan Spirit Airlines
27 Dec - 11 Jan Spirit Airlines
13 Dec - 01 Jan Spirit Airlines

Also check the deals for one-way flights from Boston to San Jose in December.

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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