MOBILE, Ala. - Delta Air Lines will add two more flights to Mobile Regional Airport beginning June 5, bringing its total to nine on weekdays and returning mainline jet service to Mobile for the first time since November. The carrier's total number of seats will increase by just 1.7 percent because Delta will substitute 50-seat regional jets for some of the 70-seat regional jets it is flying. (Source: Mobile Press-Register, 04/01/09)