Just a few years ago, the pilots that flowed from the wholly owned Envoy were 25+ years. For better than a decade no major was hiring. Furloughs after 9/11 and retirement age moving from 60 to 65 were the main causes. Regional pilots grew old, grey, and balding waiting for the call that did not come. In the last few years hiring has resumed.
Currently I understand 2007 pilots are flowing. That is 11 years from DOH with Envoy.
In a few years the flow will be 7 years +/-, assuming no attrition. With attrition it could be a bit shorter.
As hiring ramps up further, in a few years, the forecast will be about 1 in 5 regional pilots each year will be hired by the majors. (4,000 a year of the 20,000 pilots currently flying regionals.).
If you are just now looking to get on with a regional, one thing is certain, things will change from where they are today. The good news is the majors have a huge amount of retirements coming. No one is going to stop that train.