Resurrecting an old thread.

Next month I’m flying domestic into T3 on AA in the morning and out of T5 on BA In the evening. These are two separate tickets so I am guessing I wouldn’t be able to thru-check?

If I can’t thru-check or check it in at ORD in the morning, are there any good options for leaving luggage at the airport during the day?

Also. I’d quite like to nip into the FL (assuming open by then) to get a shower and breakfast. My only concern is that the luggage will be by itself at reclaim for a bit. It’s too big for carry-on. Any thoughts?

many thanks for any help,

GP