Originally Posted by izzik

If you are an AA flyer and you are using a travel agent, reports have suggested that QR plating may reduce surcharges. Your agent can advise on which plating will be best for you. AA flyers are best earning on AY, JL, QR, and AT. For domestic US, use AS. There is significant codesharing on AA metal routes... Even JAL has a codeshare on GRU JFK.