Originally Posted by
painintheuk
SH, I think that you are thinking about (non-) Flex vs. Tango. The OP is in PE and all PE fares are eligible for e-ups. The 'non-flexible' fare class in PE requires a co-pay.
Dr. PITUK
Not if you are 35K or below. They cannot upgrade on non-flexible (lowest) PE even with co-pay. They must buy at least Flex M.