Join Date: Sep 2013
Location: SFO/DTW
Programs: DL PM 0.5MM, Hyatt Globalist, HHonors Gold, SPG Plat, Marriott Gold, Avis PC, National EE, Hertz PC
Posts: 1,988
You do not need to arrive by plane to pick up a rental car from the airport.
YMMV - non-plane arrivals might waive airport taxes, but most will not.
I would just uber or taxi - whichever is the most convenient way to get there.