Cheapest return DEN–SJO flights, June

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

Return flights

16 Jun - 23 Jun Frontier Airlines
13 Jun - 18 Jun Frontier Airlines
11 Jun - 18 Jun American Airlines
29 Jun - 18 Jul United
17 Jun - 24 Jun American Airlines
14 Jun - 21 Jun American Airlines
03 Jun - 10 Jun Frontier Airlines
12 Jun - 19 Jun American Airlines
24 Jun - 01 Jul Southwest Airlines
15 Jun - 22 Jun Air Canada
24 Jun - 02 Jul Frontier Airlines
27 Jun - 04 Jul Frontier Airlines
26 Jun - 05 Jul Copa
06 Jun - 12 Jun United
19 Jun - 22 Jun Air Canada
25 Jun - 04 Jul Copa
26 Jun - 04 Jul Copa
24 Jun - 04 Jul Frontier Airlines
24 Jun - 03 Jul Copa

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

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