The vast majority of travelers, roughly 5.7 million, are expected to reach their destination by car, while 676,000 are expected to fly and 182,000 are expected to use other means, such as bus, train or cruise ship.

“Wednesday is already slated to be the busiest travel day of the week, and if weather delays travel plans, we can expect the day before Thanksgiving to be even busier on roads,” Treanor said.