Songquan Deng // Shutterstock

- Passengers: 4,649 (0.9% of all passengers)
- Top carriers:
--- #1. Frontier Airlines: 4,649

#11. Orlando International (Orlando, FL)

Canva

- Passengers: 8,005 (1.6% of all passengers)
- Top carriers:
--- #1. Allegiant Air: 8,005

#10. St Pete Clearwater International (St. Petersburg, FL)

Nate Hovee // Shutterstock

- Passengers: 8,561 (1.7% of all passengers)
- Top carriers:
--- #1. Envoy Air: 5,171
--- #2. Mesa Airlines: 2,233
--- #3. SkyWest Airlines: 1,157

#9. Phoenix Sky Harbor International (Phoenix, AZ)

Brittx // Shutterstock

- Passengers: 11,595 (2.3% of all passengers)
- Top carriers:
--- #1. Allegiant Air: 11,282
--- #2. Global Crossing Airlines: 313

#8. Orlando Sanford International (Sanford, FL)

randy andy // Shutterstock

- Passengers: 21,574 (4.2% of all passengers)
- Top carriers:
--- #1. Allegiant Air: 21,574

#7. Harry Reid International (Las Vegas, NV)

Brian Wilson Photography // Shutterstock

- Passengers: 22,678 (4.4% of all passengers)
- Top carriers:
--- #1. Allegiant Air: 22,678

#6. Nashville International (Nashville, TN)

Nate Hovee // Shutterstock

- Passengers: 46,738 (9.1% of all passengers)
- Top carriers:
--- #1. Allegiant Air: 46,738

#5. Phoenix - Mesa Gateway (Phoenix, AZ)

Canva

- Passengers: 47,202 (9.2% of all passengers)
- Top carriers:
--- #1. Envoy Air: 37,906
--- #2. Mesa Airlines: 9,048
--- #3. Sun Country Airlines d/b/a MN Airlines: 159

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

marchello74 // Shutterstock

- Passengers: 81,723 (16.0% of all passengers)
- Top carriers:
--- #1. SkyWest Airlines: 43,853
--- #2. Envoy Air: 25,808
--- #3. Air Wisconsin Airlines Corp: 5,818

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

Andrew Zarivny // Shutterstock

- Passengers: 100,034 (19.6% of all passengers)
- Top carriers:
--- #1. SkyWest Airlines: 79,017
--- #2. Frontier Airlines: 21,015

#2. Denver International (Denver, CO)

ostreetphotography // Shutterstock

- Passengers: 154,368 (30.2% of all passengers)
- Top carriers:
--- #1. Delta Air Lines: 80,556
--- #2. SkyWest Airlines: 60,841
--- #3. Endeavor Air: 12,971

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. Minneapolis-St Paul International (Minneapolis, MN)