Flight delays and cancellations escalated over the weekend, with real-time flight tracking data confirming over 8,000 delays across the United States on Sunday, which was up from approximately 5,300 the previous day. Up-to-date flight information can be found in this real-time flight tracker.

“Generally, if your flight is delayed or canceled, the airline will give you the option for an alternative flight or they’ll try to book you on a different flight or potentially with a different airline,” said AAA Northeast Senior Spokesperson Mark Schieldrop.

Portland International Airport’s flight tracker showed 17 canceled Alaska arrivals and seven canceled departures as of 6:30 a.m. Friday, as well as dozens of delayed flights. Alaska Airlines said it is working on getting travelers affected by the disruption to their destinations.

Alaska Airlines warned more flight disruptions were possible Oct. 24 following an IT outage that led to hundreds of flight cancellations.

Colorado-based airline Key Lime Air is running flights of detainees for U.S. Immigration and Customs Enforcement, according to government data, flight tracking and analysis by Colorado Newsline. Personnel in reflective vests led 11 people in shackles off a plane registered to Key Lime at King County International Airport outside Seattle on Thursday,