Minneapolis MN to Chicago or Vice Versa $72 RT on American Airlines (travel Sept-Oct) Nonstop

American Airlines have round trip airfares travelling to and from Minneapolis (MSP) and Chicago (ORD) for $72 including taxes and fees. This is nonstop service.
this round trip airfare is actually cheaper than Spirit Airlines’ round trip by $10.
Travel Availability:
Departs MSP: Sept 2, 16, 22, 23; Oct 7, 12, 21, 26
Departs ORD: Sept 9, 23, 30; Oct 14, 19, 26
Returns: wide availability returns as long as you choose a departure date from above.
Use dates and book it on Expedia , Priceline , Orbitz , American Airlines or CheapOAir
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