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

Return flights

02 Mar - 10 Mar	Iberia	direct
03 Mar - 10 Mar	Iberia	direct
01 Mar - 08 Mar	Iberia	direct
04 Mar - 11 Mar	Iberia	direct
02 Mar - 09 Mar	Iberia	direct
10 Mar - 24 Mar	Iberia	direct
03 Mar - 07 Apr	Iberia	direct
17 Mar - 24 Mar	Iberia
11 Mar - 18 Mar	Iberia
05 Mar - 12 Mar	Iberia	direct
09 Mar - 16 Mar	Iberia
10 Mar - 30 Apr	Finnair	direct
25 Mar - 01 Apr	Iberia	direct
26 Mar - 08 Apr	TAP
22 Mar - 11 Apr	Iberia	direct
15 Mar - 04 Apr	Iberia	direct
27 Mar - 03 Apr	TAP
14 Mar - 04 Apr	Air Canada
27 Mar - 05 Apr	TAP
30 Mar - 02 Apr	Iberia

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

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 March from $300

Return flights