Southwest Airlines has blamed air traffic control and weather as widespread flight cancellations and delays stretched into a fourth day, while its pilots union said the disruptions signalled how the airline’s overtaxed operations were buckling under stress.
The Dallas airline cancelled 363 flights on Monday, 10 per cent of its roster across the US, and delayed another 21 per cent. The disruptions contrasted sharply with operations at other big US carriers. American Airlines only had cancelled 1 per cent of its flights on Monday and delayed 8 per cent, and United and Delta airlines did better.
The disruptions were still an improvement from the weekend, when Southwest cancelled or delayed 59 per cent of flights on Saturday and 62 per cent on Sunday. American, by comparison, reported disruptions on 23 per cent of US flights.
“We could not anticipate the significant disruption that was created from unexpected [air traffic control] issues and bad weather across our Florida stations,” said Alan Kasher, Southwest’s executive vice-president of daily operations in a memo. “And as we’ve seen before, an unexpected number of delays ultimately leads to a staffing shortage.”
A number of airlines — including American, Spirit, Allegiant and, in June, Southwest itself — left flyers scrambling at various points over the summer as they tried to keep up with a post-pandemic travel rebound in the early months of the peak season.
Kasher said on Monday that the Dallas-based airline’s route schedule still had not fully recovered from capacity cuts made due to Covid-19, meaning “we still find ourselves with fewer frequencies between major airports to reroute delayed or cancelled customers”.
There were rumours online over the weekend that the cancellations and delays at Southwest stemmed from an illegal “sick-out” — when workers cite illness en masse as a way to disrupt business operations — which both the airline and union said was untrue.
Casey Murray, president of the Southwest Airlines Pilot Association, said in a memo to union members that what had been “a minor temporary event for other carriers devastated Southwest Airlines because our operation has become brittle and subject to massive failures under the slightest pressure”.
A small number of Southwest’s employees are upset over the airline’s Covid-19 vaccine mandate. Last week the union asked a federal court to block the mandate, saying it did not disagree with it but that the airline needed to negotiate over the action.
The union “has not authorised, and will not condone, any job action”, Murray said.
Southwest shares fell 4.2 per cent to $51.67 on Monday.