Originally Posted by
joseeantonior
Bear in mind that if you redeem an award ticket, you can not use a GPU for that flight(s). And even though you are a Premier member, co-pays for mileage upgrades to Southern South America are not waived. Mileage upgrade awards go from 15k miles on Y, to 25K miles on any other fares. And only Y and B are waived of the co-pay, M less have to pay $300+.
I would go for the GPUs if you can spare them, and have a chance on clearing.
Any preference if I buy coach and try to upgrade using miles? Guessing a GPU would trump since its a higher fare class?