With a record number of flyers preparing to take to the skies, plenty are bound to be bringing food items for Thanksgiving. But, which can you carry on and which must be checked?

The Transportation Security Administration (TSA) is prepared for Thanksgiving travel and tells people what foods can be carried through security checkpoints and what needs to be put in checked baggage.

This year’s Thanksgiving weekend is expected to be the busiest air travel weekend in American history, according to the Transportation Security Administration. Approximately 18.3 million people are expected to clear TSA checkpoints between Nov.

Thanksgiving favorites such as mac and cheese, turkey and casseroles can be brought through TSA checkpoints. But cranberry sauce, maple syrup and gravy must go in checked baggage, the agency says.

Although most foods can be carried through TSA checkpoints, some dishes may need to be packed with checked baggage.

With information from SIXT, here is a guide to which Thanksgiving food items can be carried through a TSA security checkpoint and which items need to be in checked baggage.