Cheapest return flights from Denver to Madrid in May from $560

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

Return flights

06 May - 21 May British Airways
19 May - 28 May Air Canada
19 May - 29 May Iberia
13 May - 26 May Air Canada
01 May - 07 May British Airways
01 May - 11 May British Airways
12 May - 25 May KLM
02 May - 10 May British Airways
05 May - 12 May Iberia
11 May - 18 May Iberia
29 May - 12 Jun Air Canada
31 May - 18 Jun Frontier Airlines
21 May - 05 Jun Frontier Airlines
27 May - 07 Jun Frontier Airlines
30 May - 06 Jun Iberia
25 May - 01 Jun Iberia

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

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