AirHint found the following cheapest return flights from Washington (IAD) to Madrid (MAD) in January 2026 (see full year).

Return flights

22 Jan - 28 Jan	TAP
06 Jan - 14 Jan	Air Canada
13 Jan - 20 Jan	Iberia	direct
31 Jan - 07 Feb	TAP
05 Jan - 19 Jan	British Airways
23 Jan - 30 Jan	United
01 Jan - 14 Feb	Virgin Atlantic
03 Jan - 10 Jan	TAP

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

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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Cheapest return flights from Washington to Madrid in January from $370

Return flights