Hi all,

I sort of know what SDC is, but I am unsure how it works. Can you add it to your reservation at the time of check-in online? Since I have no status, I realize it's gonna cost me $50. If I SDC to a later flight, in case I miss my connection in JFK, will I lose my seat on the flight I am originally booked onto?
I am booked on a 3 PM flight, the next one is at 7.30 pm. My plan would be to add SDC to my reservation for the 7.30pm flight, but only in case I would miss my 3 pm flight.
If someone could explain the fine details, I would really appreciate it. Thanks a lot

Cindy