Southwest Airlines

The Department of Transportation says it is looking into the airline's flight scheduling practices and will hold it accountable for refunds. The 16,700 canceled flights cost Southwest $800 million.

Why did Southwest cancel so many flights, and what's next for affected travelers? The airline-in-crisis hasn't answered all the questions, but claims it has returned to normal operations.

After Southwest Airlines canceled thousands of flights over the week, travelers are scrambling to reunite with their luggage.

The airline's CEO says the company is hoping to be "back on track before next week." But until then, it's continuing on a reduced schedule.

The disruptions add to chaos that has left people stranded at airports across the country, many of them with little idea of when they can get home or where their bags are.

The cases will be determined on a case-by-case basis, depending on the company. Here's a look at where each of the major U.S. airlines stands.

Delta, United, Southwest, American and Alaska Airlines and other say masks are now optional for travelers on their aircraft.

Hundreds of Southwest Airlines flights are either canceled or delayed on Monday, after a weekend of disruptions that the carrier has blamed on air traffic control issues and weather conditions.

Southwest Airlines canceled 28% of its scheduled flights over the weekend, blaming the woes on air traffic control issues and weather.

Southwest Airlines flights were delayed across the country Monday night because of a problem with the company's weather data provider. Flights were again delayed on Tuesday.