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

Return flights

21 Jan - 28 Jan	TAP
29 Jan - 04 Feb	TAP
29 Jan - 07 Feb	TAP
11 Jan - 18 Jan	TAP
04 Jan - 23 Jan	TAP
31 Jan - 07 Feb	TAP
22 Jan - 29 Jan	TAP
06 Jan - 13 Jan	TAP
25 Jan - 03 Feb	TAP
07 Jan - 14 Jan	TAP
12 Jan - 19 Jan	TAP
11 Jan - 15 Jan	TAP
25 Jan - 03 Feb	Iberia	direct
22 Jan - 29 Jan	Iberia	direct
06 Jan - 13 Jan	Iberia	direct

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 299€

Return flights