Cheapest return flights from Phoenix to San Juan in September from $299

AirHint found the following cheapest return flights from Phoenix (PHX) to San Juan (SJU) in September 2025 (see full year).

Return flights

12 Sep - 21 Sep Spirit Airlines
11 Sep - 15 Sep Spirit Airlines
13 Sep - 21 Sep Frontier Airlines
19 Sep - 23 Sep Frontier Airlines
03 Sep - 04 Sep Sun Country Airlines
17 Sep - 20 Sep Sun Country Airlines
09 Sep - 13 Sep Frontier Airlines
23 Sep - 27 Sep jetBlue
14 Sep - 20 Sep Delta

Also check the deals for one-way flights from Phoenix to San Juan in September.

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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