AirHint found the following cheapest return flights from Indianapolis (IND) to Madrid (MAD) in August 2025 (see full year).

Return flights

13 Aug - 20 Aug	United
15 Aug - 22 Aug	Iberia
18 Aug - 25 Aug	United
07 Aug - 25 Aug	Air Canada
21 Aug - 28 Aug	United
24 Aug - 31 Aug	United
05 Aug - 12 Aug	Iberia
07 Aug - 14 Aug	United
01 Aug - 08 Aug	Iberia
11 Aug - 18 Aug	United
27 Aug - 03 Sep	Iberia
30 Aug - 06 Sep	Iberia

Also check the deals for one-way flights from Indianapolis to Madrid in August.

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 Indianapolis to Madrid in August from $654

Return flights