LAS VEGAS (KLAS) – Allegiant Airline passengers headed to Harry Reid International Airport are advised to arrive at least three hours before their scheduled departure.

The airline posted the advisory on its social media page X (formerly known as Twitter) on Wednesday morning and cited a recent system update as the reason behind it.

File – In this May 9, 2013, file photo, two Allegiant Air jets taxi at McCarran International Airport in Las Vegas. Federal safety regulators want to fine Allegiant Air more than $715,000, saying the discount airline failed to properly fix an engine that put out hotter-than-normal exhaust fumes. Allegiant says that it followed a procedure approved by the manufacturer and the government. (AP Photo/David Becker, File)

Allegiant encouraged passengers set to travel between Wednesday and Thursday to be aware of the issue.

“If you are traveling in the next 24 hours and you are not able to check in for your flight and/or access your boarding pass, our team can assist you at the Allegiant ticket counter when you arrive at the airport,” the airline stated in its post on X.

Additional information for traveling passengers can be found on the Allegiant Airline website.