We are traveling to LHR this week, MCI-ORD on AA, then separate ticket through BA for ORD-LHR. We have about a 4.5 hour layover in Chicago. My question - what’s the best way to re-check our luggage in ORD but still access the AA Flagship Lounge? I understand the T3-T5 bus is only for international outbound flights, so it seems claiming our bags in T3, transferring to T5 for BA check-in, and then taking the post-security bus isn’t an option. I’d prefer not to have my bags held in the baggage office for several hours, either. Thanks for the input!