In 2026, the premier app for checking detailed airline seat availability—especially for those using points and miles—is Seats.aero. This powerful tool allows travelers to search across major global alliances like Star Alliance, SkyTeam, and Oneworld to find real-time award seats and general cabin availability. Unlike standard airline apps, it can show you every available flight from a specific airport for the next year in one view. Other popular options include ExpertFlyer, which is a long-standing favorite for professionals to set "seat alerts" when a specific occupied seat becomes available, and PointsYeah or Roame, which focus on "point-friendly" seat inventory. For purely visual layout checks, SeatGuru has been largely superseded by newer tools like Aerolopa, which provide high-fidelity, dimensionally accurate seat maps to help you avoid misaligned windows or proximity to galleys.