American Airlines said on Tuesday its flights had resumed after a technical glitch forced the carrier to issue an hour-long ground stop, disrupting travel for thousands on Christmas Eve, one of the busiest periods of the year.

American Airlines flights across the nation were disrupted Tuesday by a reported technical issue, but the hour-long ground stop has been lifted and flights have resumed at airports, including San Diego International Airport.

The FAA issued a nationwide ground stop for all American Airlines flights on Christmas Eve due to a “technical issue.”