O'Hare 21 Terminal Area Plan is the long-term redevelopment initiative aimed at transforming O'Hare International Airport into a model global aviation hub. It is expected to generate nearly 22,000 jobs across design, construction, and related industries. Key projects under O'Hare 21 include the O'Hare Global Terminal, the Terminal 5 Expansion (set for completion in 2023), and the construction of two new satellite concourses starting in 2023. The initiative is organized by the Chicago Department of Aviation (CDA) and financed through airline agreements without taxpayer funding.

According to a September 7, 2024 report in ChicagoYimby.com, The expansion of O'Hare International Airport has entered a new phase, with the Chicago Department of Aviation beginning to offer $1 billion in bonds to fund the project. Satellite Concourse 1 is set for completion in 2028, while the Global Terminal is expected by 2032. The full expansion, including a connecting tunnel, people mover, and a second satellite concourse, is projected to wrap up by 2034, adding 25% more gate capacity. Additionally, the city is opening bids for 21 new concessions contracts within Terminals 1 and 3, creating opportunities for eateries, stores, and duty-free shops.

The Chicago Council on Global Affairs reported that the new Global Terminal will feature modern baggage systems, increased capacity, and a design by Jeanne Gang. The renovated airport will help Chicago compete with other major global hubs like Dubai and London.

Chicago-based airline catering company Flying Food Group (FFG) is positioned to support the ORD expansion and addition of more international routes and carriers. OnBoard Magazine previously reported that FFG had partnered with ITA Airways to cater on routes between Chicago and Rome, highlighting that the company has invested heavily in upgrading its facilities, adding operational space, and customizing its menus to meet the diverse cultural tastes of global passengers.