AirHint found the following cheapest return flights from Denver (DEN) to San Jose (SJO) in August 2025 (see full year).

Return flights

14 Aug - 17 Aug	United
09 Aug - 16 Aug	United
19 Aug - 26 Aug	United
14 Aug - 18 Aug	Southwest Airlines
14 Aug - 19 Aug	Southwest Airlines
01 Aug - 10 Aug	United	direct
02 Aug - 13 Aug	United
03 Aug - 07 Aug	Frontier Airlines
03 Aug - 10 Aug	Frontier Airlines

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

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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Cheapest return flights from Denver to San Jose in August from 243€

Return flights