Just a side note for those procrastinators flying from Chicago (like me).
United has a special weekend fare for this weekend. Leave Saturday from Ohare,
and return on Monday or Tuesday. Fare is $201 round trip. I believe a
3-day advance is required, but I would suggest running to your favorite travel agent like I did.
I believe they have a ~$300 fare from Philadelphia leaving on Friday and returning Monday or Tuesday.