AirHint found the following cheapest return flights from Denver (DEN) to San Jose (SJO) in March 2026 (see full year).

Return flights

03 Mar - 09 Mar	United
09 Mar - 13 Mar	Copa
04 Mar - 08 Mar	Copa
04 Mar - 09 Mar	Copa
05 Mar - 10 Mar	Copa
08 Mar - 15 Mar	Copa
18 Mar - 23 Mar	Frontier Airlines
26 Mar - 31 Mar	Frontier Airlines
08 Mar - 15 Mar	Southwest Airlines	direct
16 Mar - 23 Mar	Frontier Airlines
28 Mar - 04 Apr	Frontier Airlines
29 Mar - 03 Apr	Copa
27 Mar - 05 Apr	Frontier Airlines

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

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 March from 257€

Return flights