Originally Posted by
saleflyer
I recently booked 2 premium LHR to CPT with miles then used 2 x upgrade vouchers for return upgrade to Upper Class. Agent said was better use than using a 241.
They are correct since that is more than half off which is what you'd get using 2-4-1. However it does burn up two vouchers vs one so depending on your plans, the number of vouchers you have and when they expire you may or may not have preferred one over the other.