United Airlines Reservation System Upgrade Scheduled for February 2026

This article summarizes reporting by CBS News and Megan Cerullo.

United Airlines Systems Upgrade to Pause Bookings and Check-Ins Early Wednesday

Airlines is scheduled to perform a major technology upgrade to its reservation system in the early morning hours of Wednesday, February 4, 2026. According to reporting by CBS News, the maintenance window will temporarily disable key customer services, including the ability to book flights, check in, and manage reservations.

The outage is expected to last approximately three and a half to four and a half hours, beginning around 1:30 a.m. CT (2:30 a.m. ET). During this time, the airline will migrate its “Shares” reservation system from a legacy data center in North Carolina to a modern facility in Chicago. United Airlines has described this move as a critical step toward improving long-term system reliability and performance.

Impact on Travelers and Services

Passengers traveling early Wednesday morning or attempting to use United’s digital tools during the outage window will face significant service disruptions. As detailed in reports regarding the upgrade, the following services will be unavailable:

• Booking: Customers will be unable to purchase new tickets via the website, mobile app, or call centers.
• Check-In: Online and app-based check-in will be disabled. Airport kiosks may also be non-functional during the migration.
• Reservation Management: Passengers will not be able to change or cancel existing bookings.
• Flight Status: Real-time updates on the app may be interrupted.

Traveler Advice: Check In Early

To mitigate potential disruptions, United Airlines has strongly urged customers flying on Wednesday morning to check in up to 24 hours in advance. Travelers should complete their check-in process on Tuesday and download mobile boarding passes before the system goes offline.

Additionally, the airline recommends carrying a printed boarding pass as a precaution. Passengers checking bags for early morning flights are advised to arrive at the airport with extra time, as manual processing may be required while systems are brought back online.

Modernization and Infrastructure Strategy

This upgrade represents a significant shift in United’s digital infrastructure strategy. The airline is moving its legacy “Shares” mainframe, a system inherited during its merger with Continental Airlines, to a new, high-tech data center. According to industry reports, this transition is designed to reduce the frequency of system crashes and enable faster data processing.

The move also supports broader technological improvements, including the integration of cloud-based infrastructure. By modernizing the backend, United aims to support advanced tools such as “Connection Saver,” which helps hold flights for connecting passengers without disrupting the wider schedule, and to facilitate the rollout of Starlink Wi-Fi across its fleet.

“Starting early Wednesday, United customers won’t be able to book flights and access other services as the airline upgrades its reservation system.”

, CBS News

AirPro News Analysis

The decision to migrate a legacy mainframe system like “Shares” is a high-stakes operation for any major carrier. In the aviation industry, these reservation systems are the central nervous system of operations, handling everything from ticketing to weight and balance calculations. While the temporary outage is inconvenient, the shift from a legacy data center in North-America to a modern facility in Chicago suggests United is prioritizing long-term stability over short-term uptime.

Recent years have seen various carriers suffer from “system meltdowns” due to aging IT infrastructure. By proactively scheduling this downtime for a migration, United appears to be taking a preventative approach to avoid the kind of catastrophic, unplanned failures that have grounded fleets in the past. If successful, this modernization could serve as a benchmark for how legacy carriers can update aging tech stacks without crippling operations for days.

Frequently Asked Questions

When exactly is the outage?

The upgrade is scheduled for Wednesday, February 4, 2026, from approximately 1:30 a.m. to 5:00 a.m. CT.

Can I still fly if I have a ticket?

Yes, flights are expected to operate. However, you must check in before the outage begins (ideally on Tuesday) and should bring a printed boarding pass.

Will my frequent flyer data be safe?

Access to MileagePlus accounts will be paused during the maintenance, but data is being migrated to the new secure facility.

Sources

• CBS News