AirHint found the following cheapest return flights from Chicago (MDW) to Madrid (MAD) in March 2026 (see full year).

Return flights

01 Mar - 30 Apr	Delta
01 Mar - 01 Apr	Delta
24 Mar - 01 Apr	Delta
24 Mar - 31 Mar	Delta
11 Mar - 08 Apr	Delta
17 Mar - 25 Mar	Delta
05 Mar - 08 Mar	Delta
15 Mar - 23 Mar	Frontier Airlines
16 Mar - 22 Mar	Frontier Airlines
05 Mar - 14 Mar	Delta
06 Mar - 14 Mar	Frontier Airlines
20 Mar - 29 Mar	Frontier Airlines
15 Mar - 29 Mar	Frontier Airlines
28 Mar - 06 Apr	Porter Airlines (Canada) Ltd
12 Mar - 20 Mar	Delta

Also check the deals for one-way flights from Chicago to Madrid in March.

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 Chicago to Madrid in March from $492

Return flights