Originally Posted by hotbreeze

Dallas does not allow the same 121 airline operate out of both DFW and DAL. For Delta, they needed to have one of their regional partners fly into DAL (and stop flying into DFW) while the mainline and the rest of the regionals flew into DFW.

Since Virgin operates out of DAL and Alaska out of DFW, there will need to be adjustments if and when they merge into a single 121 certificate.