Alaska Air Group entered into supplemental agreements with Boeing to significantly expand its fleet, ordering 53 incremental 737-10 aircraft and exercising 52 existing 737-10 options. The company also added 35 new 737-10 options and exercised five 787 options, signaling a major long-term commitment to capacity growth and fleet modernization. This expansion will drive future operational scale but will also necessitate substantial long-term capital expenditures.