AirHint found the following cheapest return flights from Seattle (SEA) to Madrid (MAD) in November 2025 (see full year).

Return flights

10 Nov - 25 Nov	British Airways
10 Nov - 20 Nov	British Airways
18 Nov - 25 Nov	Iberia
05 Nov - 12 Nov	Lufthansa
30 Nov - 12 Dec	Air France
30 Nov - 07 Dec	Lufthansa
14 Nov - 20 Nov	Lufthansa
18 Nov - 13 Dec	SWISS
10 Nov - 06 Dec	British Airways
17 Nov - 13 Dec	British Airways
29 Nov - 06 Dec	Iberia
08 Nov - 22 Nov	Iberia
15 Nov - 22 Nov	Iberia
27 Nov - 04 Dec	Iberia
24 Nov - 01 Dec	Air France
25 Nov - 01 Dec	Air France
30 Nov - 20 Dec	Air France
02 Nov - 10 Nov	Lufthansa
17 Nov - 24 Nov	Iberia
09 Nov - 16 Nov	Iberia

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

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 Seattle to Madrid in November from 371€

Return flights