Yes, you can upgrade your main cabin seat for either 25K miles or 50 K miles. Think of the 25K Miles like a saver award. there is a limited supply, but that can change as the flight gets closer. Once those are used up, then you have the option of the 50 K upgrade. If you are booked in a 50 K upgrade and later a 25K becomes available, you can re-deposit and upgrade for the lesser amount.

it’s a great use from the West Coast if you can snag a 25k