Cheapest one-way flights from Phoenix to San Diego in September from 39€

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

One-Way flights

28 Sep Frontier Airlines direct
30 Sep Frontier Airlines direct
18 Sep Frontier Airlines direct
19 Sep Frontier Airlines direct
20 Sep Frontier Airlines direct
21 Sep Frontier Airlines direct
22 Sep Frontier Airlines direct
23 Sep Frontier Airlines direct
24 Sep Frontier Airlines direct
27 Sep Frontier Airlines direct

Also check the deals for return 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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