MIAMI -

American Airlines' reservation system was fully restored Tuesday afternoon, but the airline advised customers they may still experience flight delays and cancellations throughout the day.

The airline grounded its fleet because of problems employees had accessing its reservations system.

On its Facebook page, American listed several options available to customers, including:

  • If customers must travel today and are already at the airport, they can rebook on another airline by visiting an American Airlines agent or by going to the other airline’s ticket counter with their electronic ticket number.
  • If customers must travel today and are not yet at the airport, they can rebook through American Airlines reservations or through another carrier and American will honor the fare difference.
  • If a customer chooses not to travel today, there will be no charge for reservation changes or a full refund will be provided.

"It is important to note we see no evidence that today’s technical outage is related to the tragic events in Boston," the airline said in a statement.

In March, a bankruptcy judge approved its $11 billion merger with US Airways.