Yesterday I booked OAX-DFW-GRU-SDU for only $256 all-in in main cabin. The last leg is operated by GOL. I'm getting an upgrade offer on the app for the DFW-GRU segment. $375 for PE and $728 for J. For the return, I got GIG-MIA-PHL-LAS in main cabin for $385. I put in a miles plus copay upgrade request for the return. It did not clear immediately, but the supervisor that was assisting me on the phone said that the loads looked good and it should clear before too long. I've never tried an international one, so I have no idea. Therefore, I'm just thinking about the flight from DFW to GRU. I'm wondering if $728 is a good deal and I should bite now, or if I should wait for it the offer to go down. Can't believe I got that fight so cheap. I was originally planning on going to another place in Mexico for that part of the vacation, but I happened to see that ridiculously cheap price to Rio on Google flights. I may just tough it out MCE knowing that I got such a great deal. I'm PPro.