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

Return flights

19 Jan - 01 Feb	TAP
13 Jan - 20 Jan	Iberia	direct
14 Jan - 21 Jan	Iberia	direct
20 Jan - 27 Jan	Iberia	direct
21 Jan - 28 Jan	Iberia	direct
27 Jan - 03 Feb	Iberia	direct
28 Jan - 04 Feb	Iberia	direct
06 Jan - 13 Jan	Iberia
22 Jan - 29 Jan	TAP
19 Jan - 01 Feb	Finnair	direct
15 Jan - 22 Jan	Iberia	direct
16 Jan - 23 Jan	Iberia	direct
18 Jan - 25 Jan	Iberia	direct
23 Jan - 30 Jan	Iberia	direct
25 Jan - 01 Feb	Iberia	direct
26 Jan - 02 Feb	Iberia	direct
30 Jan - 06 Feb	Iberia	direct
30 Jan - 02 Feb	Iberia	direct
29 Jan - 01 Feb	Iberia
31 Jan - 03 Feb	Iberia

Also check the deals for one-way flights from Boston 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 Boston to Madrid in January from 336€

Return flights