[QUOTE=TonyCMH]
First, CMH-ORD is a United flight. If I try to book on usairways.com, it sends me to Philadelphia or Charlotte first. So, can I book on united.com and enter my Dividends Miles number? Or do I have to give them my number on the day of the flight?

Second, I have about 200K of United miles. Can I use them on US?
QUOTE]

Yes - you can book on united.com as a guest. You may also enter your US FF # where indicated. I've never had problems using either.

And you may use UA miles on US. Good luck with that one, though.