Cheapest return flights from Phoenix to San Diego in September from 67€

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

Return flights

30 Sep - 01 Oct Frontier Airlines direct
25 Sep - 26 Sep Frontier Airlines direct
24 Sep - 01 Oct Frontier Airlines direct
25 Sep - 25 Sep Frontier Airlines direct
24 Sep - 26 Sep Frontier Airlines direct
25 Sep - 28 Sep Frontier Airlines
26 Sep - 29 Sep Frontier Airlines
27 Sep - 30 Sep Frontier Airlines
26 Sep - 28 Sep Frontier Airlines
29 Sep - 06 Oct Frontier Airlines direct
24 Sep - 29 Sep Frontier Airlines
23 Sep - 30 Sep Frontier Airlines
23 Sep - 24 Sep Frontier Airlines direct

Also check the deals for one-way flights from Phoenix to San Diego 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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