Cheapest one-way flights from Boston to San Jose in May from $136

AirHint found the following cheapest one-way flights from Boston (BOS) to San Jose (SJO) in May 2026 (see full year).

One-Way flights

08 May United
13 May Spirit Airlines
05 May Spirit Airlines
11 May Spirit Airlines
20 May Spirit Airlines
26 May Spirit Airlines
17 May Spirit Airlines
09 May Spirit Airlines
15 May Spirit Airlines
25 May Spirit Airlines

Also check the deals for return flights from Boston to San Jose in May.

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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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