marchello74 // Shutterstock

- Passengers: 40,748 (47.8% of all passengers)
- Top carriers:
--- #1. SkyWest Airlines: 20,011
--- #2. Air Wisconsin Airlines Corp: 17,392
--- #3. GoJet Airlines LLC d/b/a United Express: 3,345

#2. Chicago O'Hare International (Chicago, IL)

Vladimir Mucibabic // Shutterstock

- Passengers: 43,410 (50.9% of all passengers)
- Top carriers:
--- #1. Endeavor Air: 32,358
--- #2. SkyWest Airlines: 11,052

This story features data reporting by Rob Powell, writing by Jaimie Etkin, and is part of a series utilizing data automation across 199 metros.

#1. Detroit Metro Wayne County (Detroit, MI)