Las Vegas to Chicago or vice versa $97 RT on Frontier Airlines (limited Feb Travel) Nonstop

Frontier Airlines have roundtrip airfares to and from Las Vegas (LAS) and Chicago (ORD) for $97 including taxes and fees. This is nonstop service.
Note: Frontier Airlines is an ultra low cost air carrier. You are only allowed to bring 1 personal item onboard for free. Carry-ons will cost extra.
Departs LAS: Feb 1, 2, 3, 8, 9, 10, 15, 16, 17
Departs ORD: Feb 5, 6, 12, 13, 14, 19, 20, 21
Use those dates and book on Priceline , Orbitz , CheapOAir or Expedia