Back in the early 2000s, (that sounds so long ago), AA was running a promotion against B6, a fly 3 transcons to/from JFK, get 1 free ticket anywhere AA flies. They were priced about $200 each so I did a SNA, SJC and SEA day trip. Used the voucher for a trip to FCO (tickets were going for over $1000) and upgraded with miles both ways. Flight was completely full going out so made it worth it.