United Airlines is planning a short overnight shutdown of many features on its website and mobile app as it completes an update to its reservation system. The airline says the downtime will run from 2:30 a.m. to 6:00 a.m. on Wednesday morning, which means travelers who need to book flights, check in, or make last minute changes should do it outside that window. A notice on United’s website urges customers to handle those tasks either before the outage begins or after service is fully restored.
What Will Be Unavailable During the Upgrade
United has not listed every feature that will be impacted, but the airline says many functions on both the app and the website will be disabled during the upgrade window. That includes key actions like booking a flight, completing check in, or adjusting an existing itinerary. If you have an early morning departure or you like to check in right at the 24 hour mark, it is worth planning around the downtime so you do not get stuck trying to log in during the outage.
United Removed Departures to Reduce Disruption
To make the upgrade smoother, United says it removed all scheduled departures during those early morning hours. The airline described that move as a way to create the right conditions to complete the system update as seamlessly as possible for customers. In practice, it means United is trying to avoid having flights actively departing while important booking and check in systems are temporarily limited. That kind of timing is common for major technology upgrades, since it lowers the odds that passengers will be trying to manage critical steps in the middle of the transition.
The Reservation System Being Updated Has Deep Roots
The system United is updating is called Shares, a mainframe based reservation platform. United inherited Shares from Continental Airlines as part of the two carriers’ merger, which was completed in 2012. Reservation systems are the backbone of airline operations, handling everything from booking and ticketing to seat assignments and itinerary changes. Upgrading a core system like this is a major behind the scenes project, which is why airlines typically schedule these updates during the quietest overnight hours.
What Travelers Should Do Before Wednesday Morning
If you are flying on Wednesday or making plans late Tuesday night, the safest move is simple. Book flights, check in, download boarding passes, and make any trip changes before 2:30 a.m., or wait until after 6:00 a.m. once the upgrade window ends. If you have travel details you may need during the downtime, take screenshots of your itinerary and boarding pass ahead of time so you can access them even if the app is limited. The outage is expected to be short, but planning around it can save you unnecessary stress, especially if you are dealing with a tight schedule.
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This article was written by Hunter and edited with AI Assistance