Cheapest return flights from Phoenix to San Francisco in September from $84

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

Return flights

27 Sep - 30 Sep Southwest Airlines direct
10 Sep - 18 Sep Southwest Airlines direct
10 Sep - 15 Sep Southwest Airlines direct
08 Sep - 15 Sep Frontier Airlines direct
15 Sep - 19 Sep Southwest Airlines direct
20 Sep - 22 Sep American Airlines direct
20 Sep - 07 Oct American Airlines direct
20 Sep - 20 Oct United direct
21 Sep - 28 Sep United direct
19 Sep - 28 Sep American Airlines direct
19 Sep - 21 Sep American 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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