I'm on Aer Lingus as a code share with British Airways. The flight with British Airways from the…read moreUSA was excellent. The return with Aer Lingus has been problematic. You are supposed to call British Airways if you have an issue and Aer Lingus hangs-up the line if you let them know it is a code share. I called British Airways for help and they said to call Aer Lingus! More the 10 minuets on hold for each airline. I called because we booked Business Class to the USA and the online check-in was showing standard. Nothing wrong with standard but it the tickets cost more than your car, you expect what was purchased. They claim it is a web check-in issue and all will be well. After an hour wait to check-in at Aer Lingus we had a new issue. Unlike British Airways, Aer Lingus has a 10kg limit for carry-on. So, despite packing for Germany using one small bag each my husband's bag had to be checked. If it gets lost it will be a major hassle as we need to drive once we reach the USA. Oh and I couldn't get a ticket for the USA flight. I get to do it again in Dublin.