Originally Posted by
jjmoore
You certainly could, but only if the cheaper fare classes are available. My departure on Thursday this coming week is nearly full... only M and up available. The UA37 LAX-SIN is somewhat better, but S, T, L, K are not available, which would prevent SDC. The departure date will significantly impact this ability.
They were giving me the option to do the SDC in the united app both ways when I did it a few weeks ago. I stuck with my original flights as I didn't need the extra PQMs.
FYI, you should be able to access the united app and united.com for free in flight if you want to make any seat changes or do an SDC.