Cheapest one-way DEN–SJO flights, June

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

One-Way flights

17 Jun Frontier Airlines
27 Jun United
28 Jun United
21 Jun United
23 Jun American Airlines
16 Jun American Airlines
13 Jun Frontier Airlines
19 Jun Frontier Airlines
27 Jun United direct
13 Jun Southwest Airlines direct

Also check the deals for return flights from Denver to San Jose in June.

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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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