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

Return flights

04 Mar - 08 Mar	United
07 Mar - 14 Mar	Copa
03 Mar - 17 Mar	Copa
05 Mar - 12 Mar	Copa
28 Mar - 02 Apr	American Airlines
15 Mar - 19 Mar	Copa
29 Mar - 04 Apr	Copa
28 Mar - 03 Apr	Copa
18 Mar - 23 Mar	United
12 Mar - 18 Mar	Copa
21 Mar - 28 Mar	Frontier Airlines
13 Mar - 20 Mar	Copa
07 Mar - 14 Mar	Southwest Airlines	direct

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 256€

Return flights