<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by danville 1K:
"KL" gernerally refers to the clearance of an upgrade. There is a small window of time during which you must call in and confirm the upgrade. If you don't call and confirm the upgrade goes to someone else.
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Not true. There have been many times when overseas My Itineraries shows the KL but I am not anywhere I can easily call. I have always gotten the upgrade but may not get the seat I want. It is better to call though and confirm it.
This is just my experience, your mileage may vary.