Here is an idea....park the RJs and buy some used mainline jets

From United's first Qtr Earnings report:


*Complete the removal of more than 130 50-seat aircraft from its schedule by the end of 2015. UAL will remove additional 50-seat aircraft in 2016 and beyond as aircraft come off lease.

*Acquire additional used narrowbody aircraft. The company is in final negotiations regarding the lease of 10 to 20 used narrowbody aircraft for delivery over the next few years. In addition, the company plans to continue to seek other opportunities to acquire used aircraft to meet its needs as market conditions allow.