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

Return flights

16 Sep - 23 Sep	Finnair
01 Sep - 30 Sep	Lufthansa
09 Sep - 16 Sep	United
03 Sep - 10 Sep	United
17 Sep - 24 Sep	Air Canada
19 Sep - 24 Sep	Air Canada
18 Sep - 25 Sep	United
19 Sep - 30 Sep	Air Canada
24 Sep - 21 Oct	American Airlines
24 Sep - 01 Oct	United
21 Sep - 28 Sep	Iberia
15 Sep - 22 Sep	United
26 Sep - 01 Oct	Air Canada
27 Sep - 04 Oct	United

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

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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Cheapest return flights from Phoenix to Madrid in September from $493

Return flights