Originally Posted by
WineCountryUA
SDC is not possible with that itin as there are partner flights included. You can go standby at the gate for the earlier UA flight but not SDC.
Darn... I hadn't realized that was the case.
For future reference, would that also apply to the return segments? E.g. despite having partner flights on the outbound, if the return portion was entirely on United metal, would I be able to make a SDC on the return?