Originally Posted by
BigLar
How about if using miles?
We're booked over in F, but the return (day flight) had availability in WT, so I booked it. I keep checking every day to see if WT+ opens up (still 6 months to go). I think there will be a small price differential (besides the additional miles) for for the trip (LHR-YYZ) - worth it? Or just be happy we'll be getting back at all.

I would apply the same criteria to using miles. If you're miles rich and there is availability, use it. If you are on a miles budget and you are can survive WT, save your miles to MFU WT+ to CW at a later date.