Southwest Airlines is preparing for its boldest international expansion yet, following the UK’s addition to U.S. Open Skies agreements alongside Japan, South Korea, Australia, India, and Thailand. The Dallas-based carrier is negotiating with pilots and flight attendants to adjust contracts for long-haul routes and evaluating new widebody aircraft beyond its Boeing 737 fleet. With Reykjavik service set for 2026, interline partnerships, and activist investor pressure, Southwest is redefining its global future.