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

Return flights

01 Jun - 05 Jun	jetBlue
01 Jun - 06 Jun	jetBlue
03 Jun - 08 Jun	jetBlue
26 Jun - 23 Jul	Frontier Airlines
15 Jun - 30 Jun	American Airlines
17 Jun - 23 Jun	American Airlines
17 Jun - 22 Jun	American Airlines
18 Jun - 23 Jun	American Airlines
05 Jun - 07 Jun	American Airlines
08 Jun - 11 Jun	Southwest Airlines
25 Jun - 06 Jul	United

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

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 Juan in June from $339

Return flights