Originally Posted by
dtremit
Is there any way to book a mixed class, multi-city itinerary on aa.com? I'm looking to book BOS-LAX/SAN-BOS in late Oct/early Nov, and for my particular dates, there's very little added cost to pay for F on the SAN-BOS sector. The BOS-LAX nonstop is quite a bit more in F, and would probably be a better use of a mileage upgrade.
Phone AA, get the itinerary set up on the phone and put on hold, then go to the website and pay.