Flying Washington, D.C. → Madrid at the front of the plane
Booked well, Washington, D.C. to Madrid in First Class is not an indulgence so much as arithmetic: a flat bed out of Washington Dulles International Airport (IAD), hours of genuine sleep, and a first day in Madrid you don't lose to recovery.
Because no carrier flies true First Class nonstop on this pairing, the routing craft matters. British Airways, Air France, Lufthansa and American Airlines each offer superb one-stop itineraries through their hubs — often at fares below what a nonstop business seat would cost, with a lounge stop that feels like part of the vacation.
Dulles offers a solid premium landscape: Lufthansa operates its own lounge complex, and Etihad, Qatar Airways, and Air France premium passengers enjoy dedicated or elevated partner facilities. There is no standalone international First Class lounge, though Lufthansa First travelers receive enhanced handling when the First cabin operates on the Frankfurt route.
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.