Flight canceled? Yes, you are entitled to a refund [Video]

TAMPA, Fla. — For the fifth straight day, Delta Air Lines is facing significant disruptions to its operations in the wake of Friday’s global tech outage.

While most businesses and airlines impacted by the bugged CrowdStrike software update have largely recovered, delays and cancelations continue to pile up for Delta – stranding tens of thousands of frustrated passengers.

Delta has canceled more than 5,500 flights since the outage started early Friday morning.

The U.S. Department of Transportation (DOT) has now launched an investigation into the airline over the widespread disruptions and “reports of concerning customer service failures.” Delta said in a statement it “is fully cooperating.”

“Delta teams are working tirelessly to care for and make it right for customers impacted by delays and cancellations as we work to restore the reliable, on-time service they have come to expect from Delta,” the airline said in a statement.

But what are passengers …