TSA pre-check is a dominant platform that gives travelers various advantages worldwide. At the airport, you will get expedited screening, ease in the checkpoints, etc. You can add the TSA pre-check to the reservation if you are enrolled in the CBP program and get the KTN number. When you make the reservation and want to add the TSA pre-check, you can do so online or connect with customer service. To find out how do I add my TSA precheck to American airlines after booking, you need to follow the below simple steps:

• Initially, you must access the official web portal of American airlines.
• After this, you can tap on the login button available on the website.
• You need to add the correct username and password to get the account details.
• You can choose the information and password option when you find your account. 
• You will see the secure travel option that you need to open.
• You need to choose the appropriate reservation; you want to add the TSA pre-check for the flight journey. 
• In the known traveler number field, you need to add the pass ID or KTN. 
• Your KTN will be uploaded to the appropriate reservation.
• American Airlines will also send you the confirmation message with the boarding pass having TSA PreCheck at your registered email id. 

Can I add TSA PreCheck to an existing reservation with American airlines?

Yes, you are eligible to add the TSA PreCheck to the already booked flight journey with American airlines. You can log into your American Airlines account or make the changes using the "manage reservation" option. Thus, you need to choose the reservation to add the TSA PreCheck to the existing booking. With this, you will get Can I add TSA PreCheck to an existing reservation American before the scheduled departure.

Why is my TSA PreCheck not showing on my boarding pass with American airlines?

There are suitable reasons for TSA PreCheck not showing on the American Airlines boarding pass. When you enroll with the TSA PreCheck, you will get the KTN number for which you only get the priority services. Following are the reasons why is my TSA PreCheck not showing on my boarding pass with American airlines to board the flight. 

• The membership with TSA is expired, due to which you are unable to see the TSA PreCheck indicator on the reservation. 
• You can get a slight discrepancy between the name on your boarding pass and KTN. 
• You are not randomly being issued TSA PreCheck or traveling with infants.
• TSA PreCheck lanes are available 24/7, but some airports can close the screening lanes. 
• The KTN name, and date of birth, must be accurate, and you need to check with American airlines. 

Does TSA PreCheck show on the mobile boarding pass American Airlines?

Yes, TSA PreCheck is also available with American Airlines on the mobile boarding pass. You don't need to search for any mobile boarding pass having TSA PreCheck available on the ticket. You can create an American airlines mobile ID with a TSA PreCheck membership. You will see does TSA PreCheck show on a mobile boarding pass American airlines and acquire seamless security at the airport.