Out of curiosity, I went to
DOT's Consumer Airfare Report (Table 6) to see what the most popular domestic destinations out of San Antonio were. The data is from Q2 2008 - the latest data available.
A couple of notes:
The number of daily passengers in each market includes people traveling in either direction. So for example SAT - DFW - 1938 daily passengers mean that about half that number (969) are flying from SAT to Dallas on a daily basis and the other half are flying from Dallas to SAT.
These numbers are for origin and destination traffic only, meaning that the passenger either starts their trip in SAT and ends in the other city, or starts in the other city and ends in SAT. Again, using SAT-Dallas as an example 1,938 passengers per day either start in SAT and end in Dallas or start in Dallas and end in SAT. The numbers do not include folks who fly from SAT to DFW to make a connection to go on to somewhere else.
Here's the list ranked in order:
01. Dallas-Fort Worth, TX (includes DFW and Love Field) - 1,938 daily passengers
02. Chicago, IL (includes O'Hare and Midway) - 874 daily passengers
03. New York, NY (includes JFK, La Guardia and Newark) - 734 daily passengers
04. Las Vegas, NV - 701 daily passengers
05. Houston, TX (includes Intercontinental and Hobby) - 632 daily passengers
06. Baltimore, MD - 585 daily passengers
07. Atlanta, GA - 579 daily passengers
08. Denver, CO - 563 daily passengers
09. Los Angeles, CA (LAX only) - 519 daily passengers
10. Phoenix, AZ - 472 daily passengers
11. Washington, DC (includes Dulles and National) - 462 daily passengers
12. Orlando, FL - 429 daily passengers
13. El Paso, TX - 398 daily passengers
14. Philadelphia, PA - 371 daily passengers
15. Detroit, MI - 338 daily passengers
16. San Diego, CA - 329 daily passengers
17. Seattle, WA - 315 daily passengers
18. St. Louis, MO - 314 daily passengers
19. Fort Lauderdale, FL - 311 daily passengers
20. Kansas City, MO - 298 daily passengers
21. Tampa, FL - 262 daily passengers
22. Minneapolis-St. Paul, MN - 225 daily passengers (tie)
22. Nashville, TN - 225 daily passengers (tie)
24. Boston, MA - 208 daily passengers
25. Harlingen, TX - 204 daily passengers
26. San Francisco, CA - 193 daily passengers
27. Raleigh-Durham, NC - 190 daily passengers
28. Indianapolis, IN - 186 daily passengers
29. Salt Lake City, UT - 184 daily passengers
30. Oklahoma City, OK - 183 daily passengers
31. Santa Ana, CA (Orange County) - 159 daily passengers
32. Columbus, OH - 155 daily passengers (tie)
32. New Orleans, LA - 155 daily passengers (tie)
34. Pittsburgh, PA - 154 daily passengers
35. Tulsa, OK - 152 daily passengers
36. Portland, OR - 147 daily passengers
37. Norfolk, VA - 139 daily passengers
38. Charlotte, NC - 136 daily passengers
39. Little Rock, AR - 135 daily passengers
40. Sacramento, CA - 133 daily passengers
41. San Jose, CA - 128 daily passengers
42. Cleveland, OH - 121 daily passengers
43. Jacksonville, FL - 118 daily passengers (tie)
43. Oakland, CA - 118 daily passengers (tie)
45. Hartford, CT - 117 daily passengers (tie)
45. Omaha, NE - 117 daily passengers (tie)
47. Albuquerque, NM - 115 daily passengers
48. Amarillo, TX - 107 daily passengers
49. Birmingham, AL - 99 daily passengers
50. Louisville, KY - 98 daily passengers
It looks like Seattle, Kansas City, and Boston are the three most popular destinations out of SAT that currently
do not have any nonstop service.