One of the mostly ask query during JetBlue flight is How Do You Add TSA PreCheck® to JetBlue? Enter your Known Traveler Number (KTN) when making your reservation or later via the JetBlue website’s “Manage Trips” function to add TSA PreCheck® to your flight. Ensure that the KTN is maintained in your TrueBlue profile as well. If your boarding pass was processed correctly, it will have the TSA PreCheck® emblem on it.