Hello all,

I am flying from the US to Italy on AA and then connecting to BA in Heathrow. Though, I know AA has its carry-on allowance, I had always been able to take somewhat "bigger" carry-on without any issues.

My question is - if it is allowed for me to take my carry-on on board AA - will I have issues with BA? I mean, it's a bit inconvenient to find out later that you have to check your luggage on your connecting airline.

Thanks in advance.

FHD