AirHint found the following cheapest return flights from Atlanta (ATL) to Madrid (MAD) in October 2025 (see full year).

Return flights

12 Oct - 20 Oct	Frontier Airlines
05 Oct - 12 Oct	Frontier Airlines
08 Oct - 17 Oct	Frontier Airlines
02 Oct - 27 Oct	Frontier Airlines
10 Oct - 17 Oct	Frontier Airlines
05 Oct - 12 Oct	Air France	direct
08 Oct - 17 Oct	Air France	direct
02 Oct - 27 Oct	Virgin Atlantic	direct
10 Oct - 17 Oct	Virgin Atlantic	direct

Also check the deals for one-way flights from Atlanta to Madrid in October.

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 Atlanta to Madrid in October from 456€

Return flights