Orhan Cam // Shutterstock

- Passengers: 12,213 (6.5% of all passengers)
- Top carriers:
--- #1. PSA Airlines: 12,213

#5. Ronald Reagan Washington National (Washington, DC)

Songquan Deng // Shutterstock

- Passengers: 15,693 (8.4% of all passengers)
- Top carriers:
--- #1. Spirit Air Lines: 11,168
--- #2. Breeze Aviation Group DBA Breeze: 4,525

#4. Orlando International (Orlando, FL)

marchello74 // Shutterstock

- Passengers: 34,393 (18.3% of all passengers)
- Top carriers:
--- #1. SkyWest Airlines: 28,571
--- #2. Air Wisconsin Airlines Corp: 5,822

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

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- Passengers: 54,414 (29.0% of all passengers)
- Top carriers:
--- #1. SkyWest Airlines: 36,710
--- #2. Endeavor Air: 17,704

#2. Hartsfield-Jackson Atlanta International (Atlanta, GA)

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- Passengers: 68,894 (36.7% of all passengers)
- Top carriers:
--- #1. PSA Airlines: 68,894

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. Charlotte Douglas International (Charlotte, NC)