Southwest is largest US domestic airline, American is largest international US airline in Dec-2009

US Bureau of Transportation Statistics (BTS) stated (11-Mar-2010) Southwest Airlines remained the largest US airline in Dec-2009, ranked by domestic scheduled enplanements. Details include:

• Southwest: 8.4 million, +4.9% year-on-year;
• American: 5.4 million, -3.0%;
• Delta: 4.3 million, -9.9%;
• US Airways: 3.5 million, -8.2%;
• United: 3.5 million, -8.1%;
• Continental: 2.7 million, -0.5%;
• Northwest: 2.4 million, -11.3%;
• AirTran: 2.0 million, +0.6%;
• JetBlue: 1.7 million, +2.3%;
• SkyWest: 1.7 million, +25.2%.

Meanwhile, American Airlines was the largest US airline, ranked by international scheduled enplanements. Details include:

• American: 1.7 million, -2.1%;
• Delta: 1.0 million, +2.1%;
• Continental: 1.0 million, +6.6%;
• United: 865,800, -1.3%;
• Northwest: 614,700, -18.7%;
• US Airways: 479,000, -0.8%;
• JetBlue: 221,200, +58.7%;
• Alaska: 160,700, +1.7%;
• ExpressJet: 156,300, +12.6%;
• Executive: 109,700, +13.1%. [more]