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

Return flights

22 Sep - 01 Oct	Air France
20 Sep - 01 Oct	Delta
20 Sep - 24 Oct	Delta
17 Sep - 24 Sep	Delta
30 Sep - 31 Oct	SWISS
17 Sep - 23 Sep	Delta
29 Sep - 14 Oct	Delta
24 Sep - 21 Oct	Delta
25 Sep - 07 Oct	KLM
17 Sep - 30 Oct	Delta
22 Sep - 25 Sep	Air Europa
15 Sep - 30 Oct	Delta
21 Sep - 25 Oct	SWISS
13 Sep - 22 Sep	Air Canada
11 Sep - 24 Sep	Delta
12 Sep - 19 Sep	Delta
19 Sep - 24 Sep	Royal Air Maroc
21 Sep - 25 Sep	Iberia
26 Sep - 29 Sep	Delta
12 Sep - 22 Sep	Delta

Also check the deals for one-way flights from Miami to Barcelona 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 Barcelona in September from 410€

Return flights