Originally Posted by MSPeconomist

This morning all flights that were scheduled to depart before 8:00 am were cancelled. A Sun Country announcement said that this was due to a temporary third party network systems outage, which they claim is affecting some other airlines too. The plan is to work with the FAA to manually clear flights. Departures after 8:00 am are generally posted as on time.

ADDED: Sun Country has announced that they're willing to give full refunds for any flights scheduled for today or tomorrow. Also, no change fees will apply.