Originally Posted by
YEG_SE4Life
With my Lat FP experience, I really don't believe you will have a problem upgrading this flight. If you truly want to ensure it, one strategy would be to keep your FP booking and buy a J ticket. Cancel the J ticket at t-48 hrs. You could then grab the canceled seat with your comp UG.
There is a problem with that strategy. If the flight overall is sold out or oversold, or if the J class cabin is oversold - refunding 2 J class tickets will not necessarily change J0 availability to J2 availability.
If you look at certain weekends days in March 2018 - certain days have all J class cabins on the rouge flights already sold out!