So I have a flight purchased in P, MGA-YEG, and I want to do a SDC. I have done SDC many times before via the app without issues, but this time it does not present the option "switch to another flight" so I'm assuming I will have to call.
I have three issues
1) there are only two UA flights a day ex MGA so I have limited options.
2) The flight I want to change to does not have any F seats left, so will I be able to SDC into an economy seat?
3) I am hopefully going to be able to make at least one more SDC to postpone my flight by a full 24 hours. The flight the following morning does have F seats available, will I be able to SDC again if I am successful with #2?
Thanks for any advice! My window opens in about 2 hours.