Our US Air flights back from Paris had a schedule change that sucked so we changed our flights. We are now flying back on Lufthansa from Paris to Frankfurt, Frankfurt to Denver both in business class. We are connecting in Denver on United to Omaha but they didn't have any first class availability so we are in coach for the short hop from Denver to Omaha. My question is, since we are on United in economy are they are going to try charge us to check our luggage on the Denver to Omaha leg after clearing customs and rechecking our bags? I assume I can PI them into submission since we booked at a business class rate but have never done this before. Anyone know how this will work?