I have a friend who is interested in working for UAL, SWA or Frontier as a pilot in DEN only. His numbers are:

2700 TT
2000 PIC
1500 ME
580 Jet
Colledge degree

He is not current and hasn't flown in 4 years. What would be the best route to become current again and eventually work for one of those carriers. Looking for a short/long game plan.

Thanks
Skillz