Cheapest return flights from Washington to Madrid in December from 356€

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

Return flights

08 Dec - 15 Dec Lufthansa
02 Dec - 09 Dec British Airways direct
10 Dec - 09 Jan Air Canada
02 Dec - 16 Dec Delta
10 Dec - 16 Dec KLM
04 Dec - 11 Dec British Airways direct
03 Dec - 07 Dec British Airways
28 Dec - 08 Jan Lufthansa
01 Dec - 08 Dec Delta
04 Dec - 08 Dec SWISS
29 Dec - 12 Jan Lufthansa
05 Dec - 12 Dec Iberia
11 Dec - 18 Dec Iberia
30 Dec - 24 Jan KLM
25 Dec - 17 Jan KLM
26 Dec - 17 Jan Lufthansa
30 Dec - 07 Jan SWISS
23 Dec - 12 Jan Air Canada
22 Dec - 17 Jan SWISS
15 Dec - 10 Jan SWISS

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

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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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