Alaska Airlines and Icelandair have expanded their codeshare partnership, offering smoother travel between the U.S. West Coast, Iceland, and Europe. Passengers can now book single-ticket itineraries with coordinated baggage handling and better flight connections. A new nonstop route from Seattle to Reykjavík launches in May 2026, adding direct access to Iceland. With reciprocal loyalty rewards, this strengthened alliance enhances convenience, expands networks, and marks a new chapter in transatlantic travel.