These are the non-member fares. Click below and scroll down to where $35 OW deals start to see available routes offered.
Frontier Airlines [flyfrontier.com]
Book by April 26
Travel May 2-30, 2016
Valid Tuesdays, Wednesdays, and Saturdays. 7 day advance purchase required.
Fares are one way and do not require roundtrip purchase.