During a JetBlue flight How Do You Add TSA PreCheck® to JetBlue? is among the most frequently asked questions. Entering your Known Traveler Number (KTN) when making your reservation or later via the JetBlue website’s “Manage Trips” function will allow you to add TSA PreCheck® to your flight. Ensure that the KTN is also preserved in your TrueBlue profile. If your boarding pass has…