TSA wants to molest your kids if you drive as well

McElroy notes that the Constitution does not specifically protect the right to travel. “Although many legal scholars consider it to be a Constitutional right akin to freedom of association, the word ‘travel’ or its equivalent does not appear in the document except to guarantee the right of Congress members to travel back and forth from ‘work,’” she writes.

Amendment IX

The enumeration in the Constitution, of certain rights, shall not be construed to deny or disparage others retained by the people.

that's where it's covered.