MileagePlus *award* travel to/from ZFV, ZTF, etc.
Forgive me if this has been mentioned up-thread, but I just recently discovered that MileagePlus miles can be redeemed for award travel to the Amtrak/UA codeshare stations (via EWR, of course).
In some cases, a Coach award to ZFV via EWR costs fewer miles than an award just to EWR!