Originally Posted by
WillBarrett_68
If they break the fare then an additional GUC would be needed for the 2nd fare element.
Originally Posted by
Pianoman109876
If you create a multi-fare ticket, your single GUC would no longer work. You would need separate GUCs for each leg.
Sort of true. If you intentionally book a multi city to force a fare break, then yes a separate GUC is required. But if you can find a roundtrip or one-way itinerary that simply has long enough connections that it’s made up of two fares, then only a single upgrade cert is required. Just a loophole to consider.