In a nutshell: The TSA Precheck program is pretty handy if you do a lot of traveling. If you are approved, you will get to go through an expedited version of the security screening process on most domestic and international trips, saving yourself a lot of time and aggravation. Once approved, you will receive a Known Traveler Number, or KTN, which is a 9 digit ID that will allow you to take advantage of the Precheck program. Once you have it, you must apply it to your airline accounts. The procedure for doing so with American Airlines is pretty fast and simple.
The TSA Precheck program is pretty handy if you do a lot of traveling. If you are approved, you will get to go through an expedited version of the security screening process on most domestic and international trips, saving yourself a lot of time and aggravation. Once approved, you will receive a Known Traveler Number, or KTN, which is a 9 digit ID that will allow you to take advantage of the Precheck program. Once you have it, you must apply it to your airline accounts. The procedure for doing so with American Airlines is pretty fast and simple.
To receive TSA Precheck clearance, you need to apply for it and get approved via the TSA.If you can't find your KTN, you can get the TSA to send it to you again. Just go to the TSN information page, enter the required information, and follow the prompts.You can find your confirmation code in the confirmation email you got after you purchased your tickets, and also on your boarding pass.Joinging the TSA Precheck program will cost you between $78 and $85, depending on the specifics of your case.Your TSA Precheck program membership is good for 5 years, after which you will need to renew it.After you are approved for the TSA Precheck program, you will probably receive your KTN in three to five days. However, in some cases, it can take as many as 60 days, so plan accordingly.Remember, just because you apply for the TSA Precheck program does not necessarily mean that you will be approved. That is at the determination of the TSA.
To use your KTN, just scan your passport at any American Airlines kiosk in the airport and follow the prompts.
American Airlines home page
The above procedure will add your KTN to your account, so you can use it on future flights. If you already had a flight booked before you added the KTN to your account, continue on with subsequent steps to add your KTN to that flight. Otherwise, stop here, you're all done.
American Airlines trip finder
That's all you need to do to add your KTN to your existing trip.
If you need any help with your KTN, call an American Airlines representative to get it. You can reach one 24 hours a day, seven days a week.

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