Thousands of flights were canceled and delayed this weekend due to weather issues and storms in Florida. The flight issues come at the travel peak for spring break.

Flight tracking website FlightAware reported there were more than 3,500 flights canceled and more than 10,000 flights delayed as of Sunday.

The cancelations and delays caused travelers to become stranded from across the county and long airline customer service wait times.

“Severe weather in the Southeast and multiple air traffic control delay programs have created significant impacts on the industry,” a JetBlue spokesperson said in an email. “Today’s cancellations will help us reset our operation and safely move our crews and aircraft back in to position.”

Air travel has made a comeback as pandemic restrictions have been easing, while there has been strong demand for spring-break flights.

JetBlue, Southwest and Spirit saw some of the worst interruptions to their business operations in Miami, Ft. Lauderdale and Orlando.

JetBlue canceled 33% of its Sunday flights.

Southwest reported on Saturday it had intermittent technology issues that caused delays, as well. The airline 14% of its Saturday flights and 10% of its Sunday flights.

Spirit canceled 27% of its Saturday flights and 33% of its Sunday flights were canceled, according to FlightAware.

Frontier, American Airlines and Alaska Airlines were also affected. Operations for some airlines have been returning to normal as of Sunday afternoon.