Originally Posted by
JJeffrey
Rather than using multi-city, I would go to aa.com and put the one option with the overnight on hold. ... Then call AA, and ask the agent to switch the JFK-SFO segment to whatever later option works the best.
This is what I did, and it was successful (as it should have been). Thanks for the advice.
Based on the amount of time the agent was taking, I became a bit concerned. But eventually (actually only ~9 minutes, but seemed much longer), he successfully completed the change ... at the same miles and without any fees (as expected).