The Atlanta Journal-Constitution -- As Delta Air Lines shrinks its operations, it sold 20 of its planes last year and has agreed to sell most of the Boeing 737-800 jets it has on order. The sold aircraft include seven CRJ-100 regional jets, five Boeing 757-200s, four Airbus 320-200s and four DC-9-30s. Also sold were two Boeing 747-200 freighter airframes, which are aircraft without engines, and an Embraer 120 airframe, according to its annual report.