Newbie here. ZAG-FRA-EWR is 30k on United.com plus $60 in taxes with eco saver. Is there a different mileage program that would cost less mileage with that route?
If you want to fly that route specifically, and on *A cheapest is SQ at 27.5k, although if your flying LH it will be with YQ.
Alternatively you can use 25k AF for flights with Skyteam, or 25k CX for BA.
Additionally if its Off-Peak dates, it would cost you 19.5k BA or 22.5k AA for flights with BA or IB.