| American Airlines (AA) | Continental Airlines (CO) | Southwest Airlines (WN) |
| Albuquerque (ABQ) | Amarillo International Apt (AMA) | Austin Bergstrom International Apt (AUS) |
| Birmingham (BHM) | Chicago O'Hare International Apt (ORD) | El Paso International Apt (ELP) |
| Harlingen (HRL) | Houston George Bush Intercontinental Ap (IAH) | Houston Hobby Apt (HOU) |
| Kansas City International Apt (MCI) | Little Rock (LIT) | Lubbock Preston Smith International Apt (LBB) |
| Midland Odessa Regional Apt (MAF) | New Orleans Louis Armstrong Intl Apt (MSY) | Oklahoma City Will Rogers Apt (OKC) |
| San Antonio International Apt (SAT) | St Louis Lambert Intl Apt (STL) | Tulsa International Apt (TUL) |