Air Transportation Service Companies
| Sobolik Airspray Inc (Pisek, ND)
Primarily Serving: Grand Forks, ND - Fargo, ND - Bismarck, ND |
| Societe Air France (New York, NY)
Primarily Serving: Union City, NJ - Jersey City, NJ - Brooklyn, NY - Bayonne, NJ |
| Sophia Tours (Sylmar, CA)
Primarily Serving: Newhall, CA - Santa Clarita, CA - Burbank, CA - Glendale, CA |
| Soundview Aerial Photograph (Arlington, WA)
Primarily Serving: Everett, WA - Redmond, WA - Bellevue, WA - Seattle, WA |
| South African Airways (Sterling, VA)
Primarily Serving: Reston, VA - Centreville, VA - Germantown, MD - Rockville, MD |
| Southern Air (Norwalk, CT)
Primarily Serving: Stamford, CT - Fairfield, CT - Greenwich, CT - Bridgeport, CT |
| Southwest Airlines Cargo (Oakland, CA)
Primarily Serving: Alameda, CA - Berkeley, CA - San Leandro, CA - San Francisco, CA |
| Southwest Airlines Cargo (San Antonio, TX)
Primarily Serving: New Braunfels, TX - San Marcos, TX - Austin, TX - Cedar Park, TX |
| Southwest Airlines Cargo (Morrisville, NC)
Primarily Serving: Cary, NC - Durham, NC - Raleigh, NC - Chapel Hill, NC |
| Southwest Airlines Cargo (West Palm Beach, FL)
Primarily Serving: Royal Palm Beach, FL - Wellington, FL - Boynton Beach, FL - Jupiter, FL |
| Southwest Airlines Co (Reno, NV)
Primarily Serving: Sparks, NV - Carson City, NV - El Dorado, CA - Loomis, CA |
| Southwest Airlines Co (Encinitas, CA)
Primarily Serving: Carlsbad, CA - San Marcos, CA - Vista, CA - Oceanside, CA |
| Southwest Airlines Co (Morrisville, NC)
Primarily Serving: Cary, NC - Durham, NC - Raleigh, NC - Chapel Hill, NC |
| Southwest Airlines Co (Coraopolis, PA)
Primarily Serving: Pittsburgh, PA - Youngstown, OH - Canton, OH - Akron, OH |
| Southwest Airlines Co (Manchester, NH)
Primarily Serving: Nashua, NH - Haverhill, MA - Lawrence, MA - Lowell, MA |
| Southwest Airlines Co (Oakland, CA)
Primarily Serving: Alameda, CA - Berkeley, CA - San Leandro, CA - San Francisco, CA |
| Southwest Airlines Co (Orlando, FL)
Primarily Serving: Kissimmee, FL - Sanford, FL - Deltona, FL - Port Orange, FL |
| Southwest Airlines Co (Sterling, VA)
Primarily Serving: Reston, VA - Centreville, VA - Germantown, MD - Rockville, MD |
| Southwest Airlines Co (Alameda, CA)
Primarily Serving: Oakland, CA - San Leandro, CA - Berkeley, CA - San Francisco, CA |
| Southwest Airlines Co (Saint Louis, MO)
Primarily Serving: Florissant, MO - Saint Charles, MO - Saint Peters, MO - O Fallon, MO |
| Southwest Airlines Co (Amarillo, TX)
Primarily Serving: Lubbock, TX - Lawton, OK - Wichita Falls, TX - Midland, TX |
| Spafax Airline Network Inc (New York, NY)
Primarily Serving: Union City, NJ - Jersey City, NJ - Brooklyn, NY - Bayonne, NJ |
| Speed Motor Express-Wny (Buffalo, NY)
Primarily Serving: East Amherst, NY - Niagara Falls, NY - Rochester, NY - Erie, PA |
| Spirit Airlines Wpb (West Palm Beach, FL)
Primarily Serving: Royal Palm Beach, FL - Wellington, FL - Boynton Beach, FL - Jupiter, FL |
| Sprayco (MC Farland, CA)
Primarily Serving: Delano, CA - Bakersfield, CA - Tulare, CA - Visalia, CA |
