Cheapest return BOS–SJO flights, August

AirHint found the following cheapest return flights from Boston (BOS) to San Jose (SJO) in August 2026 (see full year).

Return flights

20 Aug - 03 Sep Avianca
22 Aug - 05 Sep Avianca
26 Aug - 02 Sep Copa
18 Aug - 25 Aug Avianca
31 Aug - 06 Sep Copa
26 Aug - 31 Aug Copa
30 Aug - 06 Sep United
07 Aug - 25 Aug jetBlue
09 Aug - 15 Aug Copa

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

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