Hey guys, been looking for a return leg from GRU to MIA/JFK in July and finally noticed wide open availability almost every day via BA.com with Avios. Unfortunately I only see Economy seats available. and no Premium Economy or Business. Any suggestion on how to search for Premium Economy or Business? How can I find availability? Via another site? Do I have to call in BA to book? Are there alternative mileage programs that I can use to book? I have a ton of Amex MR points that I can transfer to. I see lots of SCL to MIA/NYC via business but nothing from GRU. Any suggestions would be greatly appreciated. Thanks!