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

Return flights

08 Sep - 23 Sep	Lufthansa
29 Sep - 14 Oct	Air Canada
22 Sep - 14 Oct	Air Canada
09 Sep - 16 Sep	United
24 Sep - 21 Oct	Delta
25 Sep - 02 Oct	United
21 Sep - 28 Sep	Virgin Atlantic
09 Sep - 03 Oct	United
22 Sep - 13 Oct	British Airways
02 Sep - 16 Sep	Air France
26 Sep - 03 Oct	British Airways
07 Sep - 14 Sep	United
15 Sep - 22 Sep	British Airways
05 Sep - 12 Sep	United
16 Sep - 15 Oct	United
23 Sep - 30 Sep	Iberia
02 Sep - 30 Sep	Lufthansa
21 Sep - 11 Oct	Delta
01 Sep - 30 Sep	Delta
01 Sep - 01 Oct	Delta

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 510€

Return flights