Cheapest return flights from Washington to Madrid in September from $454

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

Return flights

21 Sep - 29 Sep Finnair direct
21 Sep - 01 Oct Finnair direct
02 Sep - 09 Sep TAP
21 Sep - 30 Sep British Airways direct
29 Sep - 13 Oct British Airways direct
01 Sep - 15 Sep TAP
30 Sep - 17 Oct Royal Air Maroc
25 Sep - 17 Oct Royal Air Maroc
23 Sep - 05 Oct Royal Air Maroc
01 Sep - 15 Sep American Airlines direct
30 Sep - 17 Oct British Airways direct
23 Sep - 05 Oct American Airlines direct
17 Sep - 21 Sep American Airlines direct
06 Sep - 19 Sep Iberia
06 Sep - 19 Sep American Airlines direct
17 Sep - 05 Oct TAP
17 Sep - 05 Oct American Airlines direct
08 Sep - 13 Sep American Airlines direct

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

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