Cheapest return ORD–MAD flights, May

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

Return flights

24 May - 28 May jetBlue
10 May - 19 May Iberia direct
13 May - 17 May jetBlue
10 May - 17 May Lufthansa
25 May - 09 Jun Icelandair
25 May - 04 Jun Icelandair
13 May - 20 May Air Canada
27 May - 09 Jun Icelandair
25 May - 11 Jun Icelandair
29 May - 06 Jun Icelandair
10 May - 17 May Iberia direct
18 May - 26 May SWISS
12 May - 27 May Aer Lingus
15 May - 26 May Icelandair
11 May - 20 May Lufthansa
27 May - 07 Jun Icelandair
28 May - 04 Jun Frontier Airlines
28 May - 03 Jun Alaska Airlines
25 May - 21 Jun jetBlue
19 May - 09 Jun Delta

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

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