Cheapest return flights from Boston to Madrid in September from $407

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

Return flights

22 Sep - 29 Sep Iberia direct
23 Sep - 30 Sep Iberia direct
29 Sep - 06 Oct Iberia direct
30 Sep - 07 Oct Iberia direct
24 Sep - 29 Sep Iberia direct
17 Sep - 24 Sep Iberia direct
18 Sep - 25 Sep Iberia direct
20 Sep - 27 Sep Iberia direct
21 Sep - 28 Sep Iberia direct
24 Sep - 01 Oct Iberia direct
25 Sep - 02 Oct Iberia direct
28 Sep - 05 Oct Iberia direct
01 Sep - 08 Sep Iberia direct
08 Sep - 15 Sep Iberia direct
09 Sep - 16 Sep Iberia direct
27 Sep - 04 Oct Iberia direct
26 Sep - 03 Oct Iberia direct
28 Sep - 01 Oct Iberia direct
29 Sep - 02 Oct Iberia direct
30 Sep - 03 Oct Iberia

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

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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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