Following a brief outage that grounded all American airlines flights during one of the busiest travel periods of the year, American Airlines says it has resumed service Tuesday morning, albeit with substantial delays.

American Airlines requested a nationwide ground stop, which was later canceled, on the morning of Christmas Eve due to technical problems.

Christmas Eve is one of the busiest days of the year for American aviation, with the FAA reporting 41,028 commercial flights took place on the day in 2023. Disruption during the day could have a severe impact on customers who are hoping to spend Christmas with family or friends.