Right now, mainly the 77W (only routes with Flagship First) are running:
- DFW-GRU (AA963)
- DFW-HKG (AA125)
- DFW-LHR (2x daily - rotates between AA50/80 and AA78)
- JFK-LHR (AA100)
- JFK-GRU (AA951)
- LAX-HKG (AA193)
- LAX-LHR (AA108)
- MIA-GRU (AA995, AA233)
- MIA-EZE (AA931)
- MIA-LHR (AA56)
I'm pretty sure that covers it. If I missed one, let me know.
And J-->F upgrades definitely are usually easy to clear, even at booking. I cleared my JFK-LHR this coming Saturday J-->F at booking.