What are your options if your flight is delayed or canceled due to the FAA ground stop?

The FAA halted departures nationwide Friday after a communications problem affected air traffic control centers, delaying or canceling flights. Passengers whose flights are disrupted can seek rebooking from their airline, and federal rules provide refunds when a flight is canceled or significantly changed if travelers choose not to fly. United Airlines also offered affected customers a waiver to change eligible trips without change fees.