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

Return flights

16 Sep - 02 Oct	KLM
24 Sep - 01 Oct	KLM
15 Sep - 27 Oct	Air France
29 Sep - 28 Oct	Air France
26 Sep - 03 Oct	Delta
25 Sep - 01 Oct	Virgin Atlantic
25 Sep - 02 Oct	Air France
30 Sep - 07 Oct	Delta
29 Sep - 06 Oct	Air France
24 Sep - 08 Oct	Spirit Airlines
22 Sep - 29 Sep	Delta
10 Sep - 21 Sep	Frontier Airlines
19 Sep - 27 Sep	Frontier Airlines
23 Sep - 30 Sep	British Airways
14 Sep - 21 Sep	British Airways
12 Sep - 20 Sep	Spirit Airlines
21 Sep - 26 Sep	Spirit Airlines
14 Sep - 17 Sep	Frontier Airlines
11 Sep - 21 Sep	Frontier Airlines
12 Sep - 27 Sep	Frontier Airlines

Also check the deals for one-way flights from Miami to Athens 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 Athens in September from $479

Return flights