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

Return flights

12 Jan - 21 Jan	Iberia	direct
27 Jan - 03 Feb	Iberia	direct
20 Jan - 27 Jan	American Airlines	direct
20 Jan - 28 Jan	Iberia	direct
07 Jan - 20 Jan	Aer Lingus
14 Jan - 21 Jan	Iberia
16 Jan - 21 Jan	Iberia	direct
18 Jan - 25 Jan	Iberia	direct
25 Jan - 14 Feb	Iberia	direct
24 Jan - 02 Feb	Iberia
23 Jan - 30 Jan	Iberia	direct
29 Jan - 05 Feb	Iberia	direct
12 Jan - 18 Jan	American Airlines
26 Jan - 02 Feb	Iberia
24 Jan - 14 Feb	Iberia
13 Jan - 18 Jan	Iberia
17 Jan - 07 Feb	Iberia
24 Jan - 14 Feb	Iberia	direct
16 Jan - 07 Feb	Iberia	direct
17 Jan - 07 Feb	Iberia	direct

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.

Book a cheap hotel in Madrid

Cheap car rent in Madrid

Cheapest return flights from Boston to Madrid in January from $300

Return flights