WestJet Rewards - New Codeshare Cities in the US

Via AA from ORD: Baltimore, Indianapolis, Philadelphia and Washington-National

Also, the destinations page lists future service to: Atlanta, Cincinnati, Minneapolis and Salt Lake City

Obviously those four will be with an expanded Delta partnership.

St. Louis
Raleigh
Madison
Evansville

Some of these cities are pretty surprising. I had never even heard of Evansville .