Every time I fly from Europe to the US, I wish I had more time at my layover airports. My final destination is MSP, so sometimes my port of entry is either Atlanta (ATL) or Chicago (ORD). One of the times I flew through Chicago I had a layover of about 4.5 hours, but after going through CBP and rechecking my bag I was left with 3.5 hours so that wasn't enough to even just go downtown, walk around the block and get back in time, lol.

I can't figure out how I can have a stopover of 24 hours more than my actual layover? Like getting on the exact same flight the next day and instead of having 4.5 hours have 28.5 hours or a different flight but still enough time to go to town and look at stuff and fly the next mornign. Is that even possible? I don't see any such options when trying to book on delta.com.

How do you guys do it? I feel like I have lost a lot of opportunities to look at cities I have never been to.