Master Lock 4688D TSA Accepted Cable Luggage Lock in Assorted Colors, 1-Pack for $5.93

The 4688D padlock by Master Lock is TSA approved! No need to have unlocked baggage while traveling anymore. The red-and-white TSA logo on the lock notifies screeners that they can unlock and relock your baggage without having to break the lock open. Also, the 4688D comes in four colors--black, blue, red, and silver--for easy baggage identification.