I’m flying SBN-ORD-LAX in a couple of months on a Sunday afternoon. When I booked the flights, I had a 70 minute layover at O’Hare. My flight from SBN to ORD is leaving later and my flight from ORD to LAX is leaving earlier. So I now have a 45 minute layover. I haven’t flown through ORD in years. Is 45 minutes reasonable?