It is common for a boarding pass not to show a gate number if you check in early or if the airport is experiencing dynamic gate management. Airlines typically do not assign a specific gate until 2 to 4 hours before departure to allow for maximum operational flexibility. Gates can change due to the late arrival of an incoming aircraft, mechanical issues, or the need to prioritize a connecting flight's proximity. By leaving the gate number blank on your mobile pass or printing "TBA" (To Be Announced), the airline avoids the risk of you heading to the wrong terminal if a last-minute change occurs. In 2026, most airline apps—especially those like Delta or United—will update your digital boarding pass in real-time and send a "push notification" as soon as the gate is finalized. For passengers with paper passes or those using "Apple Wallet," it is essential to check the large Departure Screens (FIDS) upon arrival at the airport, as these displays are the "source of truth" for the most current gate assignments and any potential delays.