Does anyone know if this would work - If I buy MYW tickets with the Non- expirary option, but then have days left at the end of the trip can I "upgrade" to the non-expire option? I assume I would have to pay the number of days of the original ticket so it would be better to buy them at the begininng, but, just in case is this possibly?
TIA
Paula in CT

TIA
Paula in CT
