Dancestrokes // Shutterstock

- Passengers: 3,000 (0.6% of all passengers)
- Top carriers:
--- #1. Allegiant Air: 3,000

#12. San Diego International (San Diego, CA)

Nate Hovee // Shutterstock

- Passengers: 3,501 (0.7% of all passengers)
- Top carriers:
--- #1. Allegiant Air: 3,501

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

Canva

- Passengers: 6,448 (1.4% of all passengers)
- Top carriers:
--- #1. Allegiant Air: 6,448

#10. John Wayne Airport-Orange County (Santa Ana, CA)

Canva

- Passengers: 12,816 (2.7% of all passengers)
- Top carriers:
--- #1. TEM Enterprises dba Avelo Airlines: 12,816

#9. Bob Hope (Burbank, CA)

Nadia Yong // Shutterstock

- Passengers: 20,012 (4.2% of all passengers)
- Top carriers:
--- #1. Horizon Air: 19,865
--- #2. SkyWest Airlines: 147

#8. Portland International (Portland, OR)

randy andy // Shutterstock

- Passengers: 23,184 (4.9% of all passengers)
- Top carriers:
--- #1. Allegiant Air: 23,184

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

Strike First // Shutterstock

- Passengers: 26,564 (5.6% of all passengers)
- Top carriers:
--- #1. SkyWest Airlines: 11,312
--- #2. Horizon Air: 9,698
--- #3. Allegiant Air: 5,554

#6. Los Angeles International (Los Angeles, CA)

Nate Hovee // Shutterstock

- Passengers: 41,623 (8.8% of all passengers)
- Top carriers:
--- #1. SkyWest Airlines: 38,489
--- #2. Mesa Airlines: 3,134

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

Canva

- Passengers: 45,524 (9.6% of all passengers)
- Top carriers:
--- #1. SkyWest Airlines: 45,524

#4. Salt Lake City International (Salt Lake City, UT)

Pete Niesen // Shutterstock

- Passengers: 65,627 (13.8% of all passengers)
- Top carriers:
--- #1. SkyWest Airlines: 38,721
--- #2. United Air Lines: 26,906

#3. San Francisco International (San Francisco, CA)

Andrew Zarivny // Shutterstock

- Passengers: 80,755 (17.0% of all passengers)
- Top carriers:
--- #1. United Air Lines: 63,017
--- #2. SkyWest Airlines: 17,738

#2. Denver International (Denver, CO)

kan_khampanya // Shutterstock

- Passengers: 145,574 (30.6% of all passengers)
- Top carriers:
--- #1. Horizon Air: 80,829
--- #2. SkyWest Airlines: 64,745

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. Seattle/Tacoma International (Seattle, WA)