Data: Bureau of Transportation Statistics; Chart: Kavya Beheraj/Axios
Seattle-Tacoma International Airporthad one of the worst rates of on-time flights in the country in December, even as other airports were more deeply affected by Southwest Airlines' epic meltdown.
By the numbers: Only61.7% of domestic flights departed Sea-Tacon time in December 2022, according to the U.S. Department of Transportation's Bureau of Transportation Statistics.
Nationally, 69.1% of December's flights departed on time.
The big picture: Throughout most of last year, Sea-Tac outperformed the national average when it came to its percentage of on-time flights.
But a severe ice storm during the peak of holiday travel in December caused Sea-Tac's on-time performance to tank for the month.
Sea-Tac officials told Axios earlier this year that Southwest Airlines' systemwide delays were less of a factor than the ice, since Sea-Tac isn't a big Southwest hub.
Zoom in: At Sea-Tac in December, Southwest's on-time rate roughly matched the average on-time rates across all airlines.
By comparison, at other airports, Southwest's performance was far worse.
The bottom line: Between the bad weather and Southwest's operational challenges, flyinginDecember was truly just as bad as it seemed, the data shows.