The Baton Rouge Metropolitan Airport announced that American, Delta and United have altered their flight schedules at BTR due to the winter storm. United, American and Delta Airlines have canceled all flights on Tuesday. American canceled three of its kickoff flights Wednesday morning and United has canceled its first two morning flights Wednesday. The National Weather Service issued a winter storm warning Monday that continues through midnight tonight. Temperatures are expected to remain at or below freezing for much of the week, creating hazardous conditions that could affect operations at BTR and other regional airports. The airport is working closely with airline partners and on-site agencies to maintain safe operations, including crews on-site 24/7 for the deicing of major runways and taxiways.  Travelers are encouraged to contact airlines directly for the latest updates.