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

Return flights

29 Sep - 10 Oct	Finnair	direct
21 Sep - 28 Sep	TAP
30 Sep - 14 Oct	British Airways
30 Sep - 07 Oct	Iberia
24 Sep - 01 Oct	Iberia
22 Sep - 30 Sep	Iberia
23 Sep - 30 Sep	Iberia
22 Sep - 20 Oct	Air Canada
21 Sep - 13 Oct	SWISS
29 Sep - 13 Oct	Finnair
20 Sep - 29 Sep	TAP
20 Sep - 28 Sep	TAP
20 Sep - 23 Sep	TAP
12 Sep - 28 Sep	TAP
30 Sep - 13 Oct	Finnair
27 Sep - 05 Oct	TAP
08 Sep - 18 Sep	SWISS
15 Sep - 23 Sep	Iberia
16 Sep - 24 Sep	British Airways
15 Sep - 01 Oct	Iberia

Also check the deals for one-way flights from Miami 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 Miami to Madrid in September from 300€

Return flights