AirHint found the following cheapest return flights from Boston (BOS) to Madrid (MAD) in October 2025 (see full year).

Return flights

14 Oct - 21 Oct	British Airways	direct
15 Oct - 21 Oct	British Airways	direct
07 Oct - 14 Oct	Finnair	direct
01 Oct - 15 Oct	Finnair	direct
01 Oct - 07 Oct	British Airways	direct
08 Oct - 15 Oct	Iberia	direct
21 Oct - 28 Oct	Iberia	direct
22 Oct - 29 Oct	Iberia	direct
15 Oct - 22 Oct	Iberia	direct
08 Oct - 14 Oct	American Airlines	direct
29 Oct - 05 Nov	Iberia
25 Oct - 01 Nov	TAP
07 Oct - 01 Nov	TAP
18 Oct - 08 Nov	TAP
19 Oct - 08 Nov	TAP
15 Oct - 08 Nov	TAP
14 Oct - 08 Nov	TAP
28 Oct - 22 Nov	TAP
28 Oct - 22 Nov	British Airways	direct
30 Oct - 06 Nov	Iberia	direct

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

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 October from 275€

Return flights