Having difficulty in booking this DONE4: CMB-BKK-DOH-CPT-DOH-MAD-ATH-(SURFACE)-CAI-CMN-YUL-MIA-GUA-MIA-SEA-DFW-HKG-CMB.

The online tool is not letting the surface segment to be used. Allows AT CMN-YUL. I can fare this ITN if I leave out the surface and add ATH-CMN.

Called AA RTW and they can use the surface segment ATH-CAI but state cannot use AT CMN-YUL for a RTW fare even though able to use CAI-CMN AT flight.

Any suggestions? Could I make the online reservation with UL as first carrier and then call AA to take over the reservation and manually change the ATH-CMN to a surface ATH-CAI and add CAI-CMN flight? I assume if I give them an AA flight and date they could see the reservation.

Thanks