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

Return flights

24 Apr - 20 May	Air Canada
26 Apr - 16 May	Air Canada
18 Apr - 09 May	Air Canada
10 Apr - 24 Apr	Air Canada
09 Apr - 16 Apr	TAP
09 Apr - 16 Apr	British Airways	direct
10 Apr - 24 Apr	Iberia	direct
23 Apr - 30 Apr	Iberia	direct
26 Apr - 16 May	British Airways	direct
24 Apr - 20 May	Iberia	direct
13 Apr - 20 Apr	Iberia	direct
21 Apr - 26 Apr	Air Canada
03 Apr - 10 Apr	TAP
11 Apr - 18 Apr	Air Canada
16 Apr - 09 May	Air Canada
17 Apr - 29 Apr	Air Canada
18 Apr - 09 May	British Airways	direct
17 Apr - 09 May	Iberia

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

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 April from $419

Return flights