Travel-technology provider Sabre says the problem that prevented some airline travelers from checking in for flights has been fixed.

A Sabre spokeswoman said Tuesday that the problem originated with one of the company's network suppliers, CenturyLink.

Cassidy Smith of Sabre says the glitch affected airlines that connect with Sabre through CenturyLink's network.

Smith declined to identify the affected airlines. Some JetBlue customers complained they were unable to check in for flights.

CenturyLink did not immediately respond to phone and email messages seeking comment.

FlightStats says about 1,900 U.S. flights were delayed by early afternoon on the East Coast, although it's unclear how many are related to the Sabre failure.

Sabre suffered a similar outage that affected several U.S. airlines on April 29.