FlyerTalk Forums - View Single Post - Confirming known traveler number (KTN) is correct
Old Jan 24, 2019 | 5:01 pm
  #8  
CPMaverick
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If you want to be sure, call Delta.

You can also find out when OLCI opens. If pre-check isn't on your BP, then just call to add your KTN or ask the check-in agent at the airport to add it.
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