Sorry if this was posted elsewhere - I am looking for the following US upgrade codes --

1. What is the upgrade class for domestic F ?
2. What is the upgrade class for transatlantic C class ?
3. What is the upgrade class for transatlantic F class ?

I am looking for the booking code (what class has to be available to confirm the upgrade) - THANKS - kazman

It's G for domestic F upgrade

Upgrade Booking Code For International Business Class: O
Upgrade For International First: I
Miles Award For Business: E
Miles Award For First: D
Domestic Mileage Award: D

jetsetter - just to be certain - when you say "Miles award for" - this is for a totally free BIZ or F class ticket - right ??? I assume that the upgrade codes are the same for certificates/systemwides/or mileage upgrades - Am I correct ? - kazman