A “technical issue” briefly disrupted American Airlines flights nationwide early on Tuesday, the airline said, at the start of a busy Christmas Eve for travelers around the country.

The Federal Aviation Administration said American requested a ground stop for all its flights. An hour later, American said flights were again beginning to board and the FAA lifted the nationwide ground stop.

“A vendor technology issue briefly affected flights this morning,” American said in a statement sent to ABC News. “That issue has been resolved and flights have resumed.”

“We sincerely apologize to our customers for the inconvenience this morning,” the statement added. “It’s all hands on deck as our team is working diligently to get customers where they need to go as quickly as possible.”

A “technical issue” briefly disrupted American Airlines flights nationwide early on Tuesday, the airline said, at the start of a busy Christmas Eve for travelers around the country.

The Federal Aviation Administration said American requested a ground stop for all its flights. An hour later, American said flights were again beginning to board and the FAA lifted the nationwide ground stop.

“A vendor technology issue briefly affected flights this morning,” American said in a statement sent to ABC News. “That issue has been resolved and flights have resumed.”

“We sincerely apologize to our customers for the inconvenience this morning,” the statement added. “It’s all hands on deck as our team is working diligently to get customers where they need to go as quickly as possible.”

The disruption will be unwelcome for a record number of Americans expected to travel across this holiday season. The Transportation Security Administration said it expects to screen nearly 40 million travelers from Dec. 19 to Jan. 2 — a 6.2% increase from 2023.