Originally Posted by
orbitmic
Remember that AA will protect your booking even if you are on two separate PNRs while IB would not. In that sense, in your case, I would really tend to book the AA flights
So do you mean if one flight is delayed and connection missed AA will ensure I'm still put on the next available flight?
This is part of the reasoning for wanting to link the two PNRs to ensure I'm protected if there's a connection issue.