Cheapest return flights from Boston to San Jose in September from $209

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

Return flights

02 Sep - 05 Sep Spirit Airlines
03 Sep - 05 Sep Spirit Airlines
02 Sep - 04 Sep Spirit Airlines
03 Sep - 04 Sep Spirit Airlines
10 Sep - 17 Sep Spirit Airlines
02 Sep - 09 Sep Spirit Airlines
02 Sep - 06 Sep Spirit Airlines
02 Sep - 17 Sep Spirit Airlines
02 Sep - 10 Sep Spirit Airlines
02 Sep - 13 Sep Spirit Airlines
13 Sep - 01 Oct Spirit Airlines
17 Sep - 01 Oct Spirit Airlines
17 Sep - 04 Oct Spirit Airlines
15 Sep - 01 Oct Spirit Airlines
15 Sep - 04 Oct Spirit Airlines
14 Sep - 01 Oct Spirit Airlines
14 Sep - 04 Oct Spirit Airlines
22 Sep - 01 Oct Spirit Airlines
22 Sep - 11 Oct Spirit Airlines
22 Sep - 04 Oct Spirit Airlines

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

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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