Cheapest return flights from Denver to San Juan in October from 171€

AirHint found the following cheapest return flights from Denver (DEN) to San Juan (SJU) in October 2025 (see full year).

Return flights

04 Oct - 09 Oct Frontier Airlines
18 Oct - 27 Oct Frontier Airlines
15 Oct - 19 Oct Frontier Airlines
16 Oct - 20 Oct Frontier Airlines
14 Oct - 23 Oct Frontier Airlines
09 Oct - 13 Oct Frontier Airlines
22 Oct - 05 Nov United
07 Oct - 21 Oct United
28 Oct - 11 Nov United
24 Oct - 07 Nov United
01 Oct - 15 Oct United direct
08 Oct - 22 Oct United direct
09 Oct - 23 Oct United direct
27 Oct - 10 Nov United direct
29 Oct - 12 Nov United direct
23 Oct - 06 Nov United
19 Oct - 02 Nov United
18 Oct - 01 Nov United direct
26 Oct - 09 Nov United
21 Oct - 04 Nov United direct

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

Skyscanner

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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