I'm doing my first international nonrev with my family tomorrow. I went to check in online and after entering all our birthdays, passport numbers, and passport expiration dates I got a message saying "unable to process request". I went to try to check in again and was back at square 1 with all the blanks sitting empty.
Do we just have to go to the service counter and get our boarding documents or is this just my excellent luck with Delta IT? The warning message also said show up at least 3 hours early. 3 hours seems excessive and I'd like to hear if this is a legit disclaimer.
Thanks!