Cheapest return flights from Seattle to Madrid in March from $436

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

Return flights

10 Mar - 25 Mar Air Canada
03 Mar - 10 Mar Iberia
04 Mar - 11 Mar Iberia
16 Mar - 25 Mar Delta
02 Mar - 09 Mar Iberia
01 Mar - 08 Mar British Airways
05 Mar - 12 Mar Iberia
09 Mar - 16 Mar Iberia
17 Mar - 24 Mar Iberia
19 Mar - 31 Mar British Airways
26 Mar - 06 Apr Condor
31 Mar - 07 Apr Iberia
25 Mar - 05 Apr Turkish Airlines
25 Mar - 01 Apr Iberia
27 Mar - 05 Apr Turkish Airlines
30 Mar - 06 Apr Iberia
26 Mar - 02 Apr Iberia
29 Mar - 05 Apr Iberia
27 Mar - 03 Apr Iberia
28 Mar - 04 Apr Iberia

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

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