Andrew J Simcox // Shutterstock

- Passengers: 21,005 (3.8% of all passengers)
- Top carriers:
--- #1. Piedmont Airlines: 10,220
--- #2. Air Wisconsin Airlines Corp: 9,639
--- #3. PSA Airlines: 1,146

#8. Philadelphia International (Philadelphia, PA)

Thiago Leite // Shutterstock

- Passengers: 25,875 (4.6% of all passengers)
- Top carriers:
--- #1. Endeavor Air: 20,068
--- #2. Republic Airline: 5,807

#7. LaGuardia (New York, NY)

Orhan Cam // Shutterstock

- Passengers: 30,468 (5.5% of all passengers)
- Top carriers:
--- #1. CommuteAir LLC dba CommuteAir: 16,309
--- #2. Air Wisconsin Airlines Corp: 14,128

#6. Washington Dulles International (Washington, DC)

marchello74 // Shutterstock

- Passengers: 39,440 (7.1% of all passengers)
- Top carriers:
--- #1. Air Wisconsin Airlines Corp: 22,141
--- #2. SkyWest Airlines: 17,299

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

Orhan Cam // Shutterstock

- Passengers: 49,373 (8.9% of all passengers)
- Top carriers:
--- #1. PSA Airlines: 48,006
--- #2. Republic Airline: 1,367

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

Canva

- Passengers: 74,127 (13.3% of all passengers)
- Top carriers:
--- #1. American Airlines: 69,496
--- #2. Envoy Air: 4,631

#3. Dallas/Fort Worth International (Dallas/Fort Worth, TX)

Canva

- Passengers: 120,934 (21.7% of all passengers)
- Top carriers:
--- #1. PSA Airlines: 70,232
--- #2. Piedmont Airlines: 50,049
--- #3. Republic Airline: 653

#2. Charlotte Douglas International (Charlotte, NC)

Canva

- Passengers: 186,810 (33.6% of all passengers)
- Top carriers:
--- #1. Delta Air Lines: 158,461
--- #2. Endeavor Air: 25,488
--- #3. SkyWest Airlines: 2,861

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. Hartsfield-Jackson Atlanta International (Atlanta, GA)