Cheapest one-way flights from Boston to San Jose in September from $88

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

One-Way flights

03 Sep Spirit Airlines
02 Sep Spirit Airlines
06 Sep Spirit Airlines
13 Sep Spirit Airlines
17 Sep Spirit Airlines
14 Sep Spirit Airlines
25 Sep Spirit Airlines
07 Sep Spirit Airlines
21 Sep Spirit Airlines
19 Sep Spirit Airlines

Also check the deals for return 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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