Find Your Cruise
The only people to know your flight details for certain are your travel agent and P & O.
As for premium class, yes, it's worth it most times especially if it's along distance flight. Don't forget that for even more comfort, with the exception of Terminal 5 at Heathrow you can book an executive lounge at most airports for about £17-50ea and get away from the main airport hubbub with snack, refreshments, even alcoholic ones and comfy chairs. You will normally be warned when you flight is about to board as well, really pleasant.. ....Neil