Busiest Domestic Routes Out of Houston Intercontinental (November 2012- October 2013)[51]
Rank City Passengers Top Carriers
1 Los Angeles, CA 700,000 American, Spirit, United
2 Chicago, IL 673,000 American, Spirit, United
3 Denver, CO 654,000 Frontier, Spirit, United
4 San Francisco, CA 492,000 United
5 Dallas/Fort Worth, TX 488,000 American, United
6 Newark, NJ 480,000 United
7 Las Vegas, NV 442,000 Spirit, United
8 Charlotte, NC 441,000 United, US Airways
9 Atlanta, GA 400,000 Delta, United
10 Phoenix, AZ 393,000 United, US Airways