The National Weather Service has warned of a strong winter storm expected to affect holiday travel.
But, some airlines offer to rebook on their website or mobile app and waive any fees, so it's sometimes easier to make changes online than in person.
Carriers offering both are Alaska Airlines, Allegiant Air, American Airlines, Delta Air Lines, Hawaiian Airlines, JetBlue Airways, Southwest Airlines, Spirit Airlines, and United Airlines, according to the DoT dashboard.
It never hurts to request a meal or hotel during flight disruptions, and you might get lucky with a goodwill gesture from the carrier.
For example, in the case of a winter storm, it's likely many passengers will end up stranded in random cities across the US.