Originally Posted by
trueblu
Correct, but upgradeable fare buckets are likely to be more expensive than cheapo CE fares -- and on the short hops that you've mentioned, be an insane use of miles imo.
tb
+1... -- To the OP, as you are Paris based apart from the ORY-LHR possibility which had good promotions in past few months, another solution is the cheapest possible Y return on a trip like ORY/CDG-LHR-HEL all in Y, which is considered longer European and would thus earn you 10+20 TP each way, so 60 in total. Typically available for about €300 if you choose cheap days to fly, although you might have left it too late to still find cheap dates I don't know.