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

04 May - 12 May Frontier Airlines
03 May - 12 May Icelandair
12 May - 27 May Spirit Airlines
04 May - 13 May Frontier Airlines
08 May - 12 May jetBlue
10 May - 27 May Frontier Airlines
06 May - 18 May Spirit Airlines
04 May - 10 May ITA Airways
10 May - 14 May jetBlue
04 May - 11 May ITA Airways
26 May - 11 Jun jetBlue
17 May - 16 Jun Spirit Airlines
25 May - 04 Jun Spirit Airlines
26 May - 02 Jun Icelandair
19 May - 02 Jun Frontier Airlines
17 May - 07 Jun Spirit Airlines
27 May - 07 Jun Icelandair
24 May - 09 Jun Spirit Airlines
29 May - 10 Jun Spirit Airlines
08 May - 28 Jun Spirit Airlines

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

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