Yes, United Airlines utilizes assigned seating on all flights in 2026, but the ability to choose your seat for free depends on your fare class. If you purchase a Standard Economy or higher ticket, you can select your seat at the time of booking without additional charges. However, if you purchase a Basic Economy ticket, United will automatically assign you a seat at check-in (often a middle seat). On a Basic Economy fare, if you want a specific seat, you must pay an additional fee during or after booking. United has also implemented "family seating" technology in 2026, which ensures that children under 12 are seated next to at least one adult in their party for free, even on Basic Economy tickets, provided seats are available. For those seeking more room, United offers Economy Plus, which provides extra legroom and can be purchased as an upgrade during the seat selection process.