Hello! Thank you for using Just Answer. I am James, and I will be assisting you. My apologies for the delay. There were no TSA Experts online when you posted your question.
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ANSWER: No, providing that at the airport will not work out. But you can call the airline today and have your Known Traveler Number added to the reservation. Then when you go to the airport, you can print your boarding passes. This is the only way you might be able to get PreCheck on this flight.
Note that TSA PreCheck expedited screening is not always guaranteed, even if you are enrolled and eligible. In order to increase security, TSA randomizes when a person who is enrolled and eligible for expedited screening will get it. So do not be completely surprised if you do not get TSA PReCheck status, even if you are enrolled and have added your Known Traveler Number to the reservation.
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