You’ve done everything by the book — got to the airport hours before departure, followed TSA guidelines about what can’t be put in carry bags, even remembered to wear slip-on shoes to make the getaway to the gate faster.

It is no secret the week of Thanksgiving is among the busiest for U.S. airports. The FAA said it is implementing measures to keep air traffic functioning, but such measures could delay flights.

Airports across the United States are preparing for what is anticipated to be the busiest Thanksgiving travel period ever.