Timbo - "Right now, SWA owns domestic USA flying."
Total Passengers on U.S Airlines and Foreign Airlines U.S. Flights Increased 1.3% in 2012 from 2011 | Bureau of Transportation Statistics
Table 3 lists total passengers. Table 7 lists international passengers. 3-7=domestic
2012 Domestic passengers (000) -
AA/US 112,453
SW 112,234 (assumed all SW pax are domestic since they didn't make the top 10 list on table 7)
DL 95,439
UA 67,534
2012 international passenger (000) -
AA/US 28,120
UA 24,833
DL 21,006