Southwest Airlines has recently revised its Boeing (BA) delivery schedule, resulting in three additional aircraft to be delivered in 2011. The company now has 19 Boeing 737-700 aircraft scheduled for firm delivery in 2011, and 20 Boeing 737-800s scheduled for firm delivery in 2012. Southwest estimates that its 2011 available seat miles will increase 5%-6% from 2010. This is unchanged from previous forecasts.