Originally Posted by
Kacee
Subject to availability, yes it's possible.
It's possible, in that the
app may allow it, but it's against the rules, in that the
fare doesn't. So, if the app doesn't give you the option, don't be surprised if an agent refuses to move you. It may be moot anyway, as availability can be limited up front on those flights.
Originally Posted by
quantumslip
What's the rule for SDC if the first segment doesn't upgrade but the 2nd does? (All Domestic CPU). Will I get SDC options still or since there's a mismatch of classes I'll have to call it in? (Don't necessarily care about keeping the upgrade)
If the app offers anything, it will be flights through the same hub with the same fare classes on both legs -- so, if you're flying AUS-IAH-DTW, and AUS-IAH upgraded to PZ and IAH-DTW is in L, then the app will only offer you itineraries that are AUS-IAH (PZ) / IAH-DTW (L). If you call, you should be able to change to any flight with availability in the original fare class (L, in this example), subject to the rules of the underlying fare.