That whole region seems messed up right now. BWI-MDT is $157/day one way, but MDT-BWI is still only $74 one-way. I didn't see the .35/mile charge yet for BWI-DCA the other day, or to rentals involving Union Station - but they were obviously no longer coterminals because the weekend rates for one-ways were no longer the same as for returning to the same location.

Since most of my travel in that area involves one-way rentals of some sort, this is a big problem for me. Hopefully it will reset itself in a few weeks, or else I'll be forced to endure the Green Line and the M30 bus between downtown DC and BWI.