Cheapest return DEN–SJO flights, May

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

Return flights

15 May - 19 May Copa
09 May - 16 May Copa
09 May - 17 May Copa
08 May - 11 May Copa
16 May - 24 May United
07 May - 14 May United
07 May - 11 May United
30 May - 06 Jun Frontier Airlines
29 May - 05 Jun Frontier Airlines
29 May - 06 Jun Frontier Airlines
04 May - 29 May Copa
11 May - 02 Jun Volaris
18 May - 26 May Frontier Airlines
31 May - 06 Jun Frontier Airlines
21 May - 27 May Volaris
29 May - 06 Jun United direct

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

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