One common query regarding JetBlue flights is How Do You Add TSA PreCheck® to JetBlue? Your Known Traveler Number (KTN) can be added to your JetBlue ticket at the time of booking or at a later time using the "Manage Trips" area of the JetBlue website. Your TrueBlue profile also has it. At that point, your boarding pass should have the TSA PreCheck® emblem.