Flying Seattle → Madrid at the front of the plane
Booked well, Seattle to Madrid in First Class is not an indulgence so much as arithmetic: a flat bed out of Seattle-Tacoma International Airport (SEA), hours of genuine sleep, and a first day in Madrid you don't lose to recovery.
From Seattle, the marquee product on this route is British Airways First — british club-room comfort with the broadest First Class network across the Atlantic. Depending on your dates, British Airways, Air France, Lufthansa and American Airlines all present compelling options, each with a distinct suite and service style.
Sea-Tac's international premium facilities are comfortable and continually improving: Emirates First passengers are hosted in a premium lounge before the Dubai departure, and the European flagships provide elevated partner lounge access. The airport's manageable scale is itself a luxury — check-in to gate rarely takes long, even at peak hours.
On timing: may, June, September, and October are Madrid at its best — warm evenings, full terraces, and the galleries uncrowded. July and August are punishingly hot, and much of the city's restaurant scene closes for parts of August. Winter is dry, bright, and excellent value, with First fares and five-star suites both noticeably softer. San Isidro festivities in mid-May tighten hotel availability.