Originally Posted by
craz
I can tell you if they were UA SWUs that the last day they can be used for a flight in your case is on 2/29,
which btw with UAs would mean say you were flying SFO-NRT on 2/29 and connecting NRT-SIN on 3/1 it wouldnt let you UP on 3/1 only the flight on 2/29
could be CO has a set of different T&Cs
What happens if the ongoing flight is a direct flight rather than a connection?