I’m not even sure how much it will cost. The cost was to pick our seat. Otherwise, we would have been assigned a seat at the airport. The rep told me I can pay at the airport. Honestly I didn’t even think to ask the price.
We are on three separate partner/carrier flights on the way there. United, Lufthansa, and Delta.
FWIW, I was able to pick seats on the Delta flights online at no cost. I had to call Lufthansa, as that can’t be done online, and that’s where the charge was. They initially told me there was nothing they can do about seat selection since it was booked through the cruise line. I kindly persisted that they please check and after sometime they came back and were able to.