Is there any advantage to flying US domestic >US>MAD>AGP all on Iberia versus AA to MAD and then Iberia (Nostrum) to AGP? Is the connection easier Iberia to Iberia? Is there any concern with AA to IB baggage transfers in the US? One connection airport in the US better than another?
Have several choice coming up for a booking and thinking it through (too much obviously)
TIA