Originally Posted by
snicko
Weird - I didn't see that for my latest SFO - LIS flight during OLCI. I endedup having them add it at the bag counter.
During OLCI for ORD-LIS (opened 24-hr prior to departure), I was able to add a KTN at the step pictured below by clicking "Additional Security Info". Oddly, when checking 4 pax on a single PNR, the options below were only available for the 1st passenger; so, I recommend checking-in each passenger separately -- when I did this I was able to enter separate KTNs for each passenger.
TAP KTN