Originally Posted by Flying for Fun

I certainly agree that it can be done during the booking process providing U space is available but I too am unaware if an existing itinerary can be upgraded with miles even if an upfare is required.

Personally, I wouldn't upgrade with miles but you do bring up an interesting point. It isn't one that I had considered before. Economically, though, it doesn't make sense in many cases since the lowest underlying fare eligible for a mileage upgrade is more than the sell-up fare into F.


Upgradeable fare with 15K miles.

Looking at a SEA-ATL one-way on November 1st with upgrade availability.

Saver Fare: $179
Main Fare: $229
First Fare: $479

- First Class Upgrade -

GGU Fare: $229
MVP Fare: $749
MVPG Fare: $529
MVPG75K/100K Fare: $429
Mileage Fare: $429 + 15K miles

James