US: Southwest Airlines faces storm of criticism over holiday chaos

More than 10,000 flights were cancelled over the Christmas holiday, as chaos filled airports across America. Yet, Southwest Airlines found itself in the hot seat on Tuesday as the airline behind the lion's share of the weather-linked travel mayhem.

The Dallas-based domestic-focused carrier — which has historically enjoyed a strong reputation with consumers — drew withering, expletive-filled rebukes on social media, where labour leaders also highlighted horror stories from stranded airline employees.

"It's a complete meltdown," said Mike Sage, who had planned to fly back to Florida on Monday after visiting Connecticut to tend to his kayaking business.

After Southwest's phone and Internet system "collapsed", Sage drove to the airport, waited in line for two hours, and finally obtained a replacement ticket for Saturday from Southwest.

However, it came with a warning, Sage recounted to AFP.

"When [the attendant] handed me the ticket, she looked me in the eyes and said:

'If I were you, I would not count on this flight either. I would book with another airline. We have crews stranded all over, pilots sleeping on the floor in airports.' "

At issue is Southwest's performance in the wake of a brutal winter storm that began ahead of Christmas, wreaking havoc with holiday travel networks and causing about 50 fatalities.

While operations had largely returned to normal at American Airlines and United Airlines by Tuesday, Southwest cancelled more than 2,500 flights — or nearly two-thirds of planned departures — according to tracking website FlightAware.

That's on top of about 8,150 flights cancelled over the prior five-day stretch, according to the website.

The debacle weighed on company shares and drew attention in Washington, with Transportation Secretary Pete Buttigieg calling it an "unacceptable situation" on CNN.

"The rate of cancellations and delays on Southwest Airlines is unacceptable and dramatically higher than other US carriers," the Department of Transportation said in a statement to AFP.

The agency said it expected the airline to compensate travellers for incurred losses as well as "do right" by their pilots, flight attendants and other staff, and threatened to take action against Southwest if it didn't comply.

President Joe Biden retweeted the agency's statement, and Senator Maria Cantwell — a Washington state Democrat who chairs the Senate Commerce Committee — vowed to follow up.

"The problems at Southwest Airlines over the last several days go beyond weather," said Cantwell.

"The Committee will be looking into the causes of these disruptions and its impact to consumers."

Southwest has apologised for the debacle, describing the inconvenience to customers as "unacceptable".

"We were fully staffed and prepared for the approaching holiday weekend when the severe weather swept across the continent," said a company statement on Monday.

"As we continue the work to recover our operation, we have made the decision to continue operating a reduced schedule by flying roughly one third of our schedule for the next several days."

Airline officials have acknowledged that outdated systems contributed to the problems.

Southwest Chief Executive Bob Jordan alluded to a "lack of tools", adding in a December 25 message to employees that the airline was "in the process of upgrading some of those systems", according to the Wall Street Journal.

Unions pointed to chronic underinvestment as a driver of the problems.

Lyn Montgomery — president of the TWU Local 556 which represents Southwest flight attendants — posted to Twitter screenshots of flight attendants waiting for more than seven hours to receive assignments and get hotel information.

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