NEW YORK — The relentless snow and ice storms this winter have led to the highest number of flight cancellations in more than 25 years, according to an analysis by The Associated Press.

U.S. airlines have canceled more than 75,000 domestic flights since Dec. 1, including more than 14,000 this week. That’s 5.5 percent of the 1.37 million flights scheduled during that period, according calculations based on information provided by flight tracking site FlightAware.

It’s the highest total number and highest percent of cancellations since at least the winter of 1987-1988, when the Department of Transportation first started collecting cancellation data.

The nation’s air traffic system was still recovering today from the latest bout of bad weather. Flights were taking off again but thousands of passengers weren’t.