New Delhi, July 21 -- Alaska Airlines has canceled more than 150 flights - including 64 on Monday alone - following a system-wide ground stop caused by a critical IT hardware failure at its data centers late Sunday.

The airline temporarily halted all Alaska and Horizon Air flights for approximately three hours starting around 8 p.m. Pacific Time on Sunday after a key piece of multi-redundant hardware unexpectedly failed. Operations resumed around 11 p.m., but the impact is expected to linger for days.

"Additional flight disruptions are likely as we reposition aircraft and crews throughout our network," the airline said in a statement.

The Seattle-based carrier stressed that the issue is not related to any recent cybersecurity incidents...