Dancestrokes // Shutterstock

- Passengers: 4,055 (1.3% of all passengers)
- Top carriers:
--- #1. Allegiant Air: 3,518
--- #2. Southwest Airlines: 537

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

Andrew Zarivny // Shutterstock

- Passengers: 4,152 (1.3% of all passengers)
- Top carriers:
--- #1. Southwest Airlines: 4,152

#7. Denver International (Denver, CO)

Canva

- Passengers: 14,034 (4.4% of all passengers)
- Top carriers:
--- #1. Allegiant Air: 13,467
--- #2. Southwest Airlines: 567

#6. Palm Springs International (Palm Springs, CA)

Strike First // Shutterstock

- Passengers: 16,551 (5.2% of all passengers)
- Top carriers:
--- #1. Allegiant Air: 16,341
--- #2. Southwest Airlines: 210

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

Nate Hovee // Shutterstock

- Passengers: 17,340 (5.5% of all passengers)
- Top carriers:
--- #1. Allegiant Air: 17,340

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

kan_khampanya // Shutterstock

- Passengers: 63,553 (20.1% of all passengers)
- Top carriers:
--- #1. Horizon Air: 36,977
--- #2. SkyWest Airlines: 26,576

#3. Seattle/Tacoma International (Seattle, WA)

MarynaG // Shutterstock

- Passengers: 80,214 (25.4% of all passengers)
- Top carriers:
--- #1. Southwest Airlines: 65,846
--- #2. Allegiant Air: 14,350

#2. Metro Oakland International (Oakland, CA)

randy andy // Shutterstock

- Passengers: 112,507 (35.6% of all passengers)
- Top carriers:
--- #1. Allegiant Air: 64,907
--- #2. Southwest Airlines: 47,600

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. Harry Reid International (Las Vegas, NV)