AirHint found the following cheapest return flights from Washington (DCA) to Madrid (MAD) in December 2026 (see full year).
Return flights
| 06 Dec - 17 Dec | British Airways | ||
| 15 Dec - 29 Dec | Iberia | ||
| 22 Dec - 02 Jan | Lufthansa | ||
| 18 Dec - 01 Jan | Air Canada | ||
| 20 Dec - 31 Dec | United | ||
| 24 Dec - 03 Jan | Air Canada |
Also check the deals for one-way flights from Washington to Madrid in December.
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