Cheapest return flights from Washington to Madrid in December from $330

AirHint found the following cheapest return flights from Washington (IAD) to Madrid (MAD) in December 2025 (see full year).

Return flights

05 Dec - 08 Dec TAP
08 Dec - 13 Jan TAP
05 Dec - 13 Jan TAP
06 Dec - 13 Jan TAP
08 Dec - 15 Dec TAP
04 Dec - 10 Dec TAP
05 Dec - 14 Dec TAP
06 Dec - 11 Jan TAP
08 Dec - 12 Jan TAP
02 Dec - 11 Dec Iberia direct
02 Dec - 13 Jan TAP
09 Dec - 13 Jan TAP
08 Dec - 11 Jan TAP
04 Dec - 13 Jan TAP
06 Dec - 12 Dec TAP
02 Dec - 16 Dec American Airlines
09 Dec - 11 Jan TAP
02 Dec - 16 Dec Iberia direct
01 Dec - 18 Dec Iberia
05 Dec - 13 Dec TAP

Also check the deals for one-way flights from Washington to Madrid in December.

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