Chicago Travel Site

is it better to seek a travel agent or just use a website like orbitz or kayak…
at least i need to go to chicago dayton toledo new Jersey even Texas for interviews !
thanks..
these are medical residency programs interviews ..they do not pay for travel …
I am thinking to seek AAA do you have any experince with them ?

I am moving by air from chicago to connecticut by a morning 6:30 am. I will be packing my goldfish in a large plastic with 30% water and rest with air or oxygen. Where can I get small oxygen cylinders?