Cheapest return flights from Phoenix to San Francisco in September from $105

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

Return flights

25 Sep - 28 Sep Frontier Airlines direct
26 Sep - 29 Sep Frontier Airlines
26 Sep - 28 Sep Frontier Airlines
18 Sep - 25 Sep Frontier Airlines direct
19 Sep - 22 Sep Frontier Airlines
18 Sep - 26 Sep Frontier Airlines direct
12 Sep - 15 Sep Frontier Airlines direct
25 Sep - 25 Sep Frontier Airlines
20 Sep - 22 Sep Frontier Airlines
15 Sep - 22 Sep Frontier Airlines direct
29 Sep - 02 Oct Frontier Airlines
29 Sep - 02 Oct Frontier Airlines direct
30 Sep - 07 Oct Frontier Airlines
30 Sep - 07 Oct Southwest Airlines direct

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