How much time do I need to change terminals from terminal 3 to 5, in July on a Wednesday? My flight is arriving at 15:48 at terminal 3. Do you go through security checks in both terminals? Is there a shuttle I can take?

Allow 2 hours extra once in the airport. 3 hours if you are going international

I'm not sure I was just taking the bus from Rockford to O'Hare sorry I couldn't help

Well, being that they are labeled A,B,C...not really sure. It took 10 mins to get to E from C. I did NOT see shuttles. Carts are usually reserved for those that have a handicap or maybe an emergency. Would have to call them with better details.

First part of question ❓ to the other two. You go through 1 security check. And there is also a shuttle that can take you. Call ahead to find out which shuttle you should catch.