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

Return flights

04 Dec - 12 Dec	TAP
09 Dec - 13 Dec	TAP
02 Dec - 05 Dec	TAP
03 Dec - 10 Dec	Iberia	direct
08 Dec - 15 Dec	Iberia
15 Dec - 22 Dec	Iberia
17 Dec - 24 Dec	Iberia	direct
14 Dec - 21 Dec	Iberia	direct
02 Dec - 09 Dec	Iberia
07 Dec - 14 Dec	Iberia
26 Dec - 09 Jan	TAP
31 Dec - 07 Jan	Iberia	direct
28 Dec - 04 Jan	Iberia	direct
30 Dec - 06 Jan	Iberia	direct
29 Dec - 05 Jan	Iberia	direct
31 Dec - 03 Jan	Iberia	direct
26 Dec - 09 Jan	Iberia	direct
25 Dec - 01 Jan	Iberia	direct
26 Dec - 02 Jan	Iberia	direct
27 Dec - 03 Jan	Iberia	direct

Also check the deals for one-way flights from Madrid to Boston in December.

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 December from 417€

Return flights