It also seeks options to buy 30 additional regional jets, its court filing said.
Deliveries of the 30 Bombardier CRJ-900 jets would begin in September and continue through February 2010, Air Transport World reported Friday.
They will be configured for 76 seats in two classes.
Adding first-class seating to the regional jets would "meet the changing demands of the network," Delta said.
Swim Week Miami Beach 2014 [PHOTOS]