Southwest Airlines (SWA) on March 8 took delivery of its first Boeing 737-800; it plans to receive 33 -800s by the end of the year.
It will take delivery of two more on April 22, two more on May 13, and by the August schedule, we'll have more than 20 -800s flying longer-haul routes like between Chicago Midway and the West Coast, between Baltimore/Washington and California, and between Florida and Las Vegas.