Cheapest return flights from Denver to San Juan in October from 228€

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

Return flights

05 Oct - 10 Oct Frontier Airlines
02 Oct - 05 Oct Frontier Airlines
28 Oct - 04 Nov Southwest Airlines
22 Oct - 26 Oct Southwest Airlines
28 Oct - 11 Nov United
25 Oct - 08 Nov United
09 Oct - 14 Oct Southwest Airlines
29 Oct - 12 Nov United
30 Oct - 13 Nov United direct
27 Oct - 10 Nov United
17 Oct - 20 Oct United direct
02 Oct - 05 Oct United direct
17 Oct - 31 Oct United direct
31 Oct - 14 Nov United
06 Oct - 13 Oct Delta
18 Oct - 01 Nov United
09 Oct - 14 Oct United direct
19 Oct - 02 Nov United
05 Oct - 10 Oct 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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