I'm (waitlisted to) burn 15K AA miles + $50 to go from Y to J on a LAX-JFK redeye.
I got the miles for a delayed LAS-LAX flight, and a $300 voucher for VDB'ing myself OFF the flight and catching a ride to LAX for the second leg home (LAX-SEA), so I figure this is free trave (when I fly AA I stick my miles in AS, so the miles would be orphaned- plus I prefer NW (soon DL) for long-distance mileage runs as AS status gives you premium seat selection on NW and limited domestic upgrades, but not AA).
Yeah, there's probably some exotic 57 stop MR I could do that's a better use of the voucher+miles (I still have residual value left that will be good until next June), but I've never been to New York. (My return to the West Coast is burning a WN Rapid Rewards one-way to go LGA-MDW-LAS to visit friends in Las Vegas before returning home, which is quite a difference in experiences for transcon travel. I figure it will make a nice TR).