Originally Posted by GNRMatt

In looking at booking a complex fare with AA, how is this done? In my example, pulled from ITA Matrix, it would be

9/15 - AA740 (PHL-MAD)
Connecting on 9/16 to IB3914 (MAD-PMI)
9/20 - Vueling 3915 (PMI-BCN)
Connecting to AA743 (BCN-PHL)

The price I'm seeing is $626/Person, but since this is on multiple airlines without codeshares, how can I book this online with AA (since the TATL legs are with them) and get that price? Is it possible?