The last day of the year-end holiday travel rush is unfolding like every day since Christmas Eve for airline passengers: chaotic. Airlines canceled nearly 2,700 Sunday flights across the country and into and out of the United States, according to flight tracker FlightAware. That's on top of more than 2,700 Saturday flight cancellations, bringing the total since Christmas Eve to more than 15,000 canceled flights. This weekend's cancellations marked the worst two-day stretch of the holiday travel season and affected passengers on nearly every U.S. airline. The travel trouble is expected to continue into Monday as an East Coast storm approaches, with nearly 1,500 U.S. flights canceled as of late Sunday, according to FlightAware. Southwest Airlines has canceled nearly 400 Monday flights, or 10% of its scheduled flights, JetBlue 124 flights, or 12% of its flights. Visit our link in bio for the latest. 📸: Michael Perez, @apnews