Cheapest return flights from Washington to Madrid in December from 306€

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
05 Dec - 15 Dec TAP
04 Dec - 08 Dec TAP
04 Dec - 09 Dec TAP
02 Dec - 11 Dec British Airways
05 Dec - 10 Dec TAP
02 Dec - 11 Dec Finnair direct
02 Dec - 16 Dec Lufthansa
08 Dec - 15 Dec Lufthansa
03 Dec - 10 Dec KLM
10 Dec - 27 Jan KLM
30 Dec - 13 Jan SWISS
29 Dec - 15 Jan SWISS
28 Dec - 17 Jan Lufthansa
28 Dec - 15 Jan Lufthansa
30 Dec - 13 Jan Iberia direct
28 Dec - 14 Jan Lufthansa
03 Dec - 12 Jan Aer Lingus
28 Dec - 11 Jan TAP
28 Dec - 15 Jan Iberia direct

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

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