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

Return flights

21 Jan - 28 Jan	Iberia
21 Jan - 27 Jan	Iberia	direct
21 Jan - 26 Jan	Iberia	direct
22 Jan - 28 Jan	Iberia
28 Jan - 09 Feb	Aer Lingus
22 Jan - 28 Jan	British Airways	direct
26 Jan - 02 Feb	Iberia	direct
27 Jan - 03 Feb	Iberia	direct
29 Jan - 05 Feb	Iberia	direct
28 Jan - 04 Feb	Iberia
27 Jan - 31 Jan	TAP
31 Jan - 07 Feb	TAP
28 Jan - 01 Feb	TAP
20 Jan - 27 Jan	Iberia
25 Jan - 31 Jan	KLM
22 Jan - 07 Feb	KLM
26 Jan - 01 Feb	KLM
27 Jan - 09 Feb	KLM
17 Jan - 30 Jan	Delta
23 Jan - 27 Jan	Iberia	direct

Also check the deals for one-way flights from Madrid to Boston 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 Madrid to Boston in January from 391€

Return flights