Booked a RT on AA in J to TLV using AMEX BP (cash price ~$4,600).
After booking I realized that return flight would end up extending my 17 Tammuz fast, so I would rather change to the next day (after the fast).
AA says all changes only through travel agent. AMEX travel is quoting over $4,000 to change to next day.
Can AA touch the ticket after travel has started?
In case I can't change the return flight to the next night, is there any way to leave the return unused (for use at a future date), while I book something else?