Southwest mainly flies from secondary airports; most transcontinental trips require one or two stops.

Southwest flies only Boeing 737s, and it typically buys them in bulk.

A compromise allowed Southwest to fly from Dallas to neighboring states.

Unlike other major airlines, which concentrate their flying around hubs and connections, Southwest flies directly from city to city.

It plans to match Southwest's fares to cities where the two directly compete and has added more flights on the routes that Southwest will fly.

Southwest flies point to point, back and forth.

Southwest flies into Nashville, and the airport there would like to offer flights to Dallas.

"People throughout the country would save bucketfuls of money if Southwest could fly to more states out of Love Field," he said.

Southwest flies just the Boeing 737.

In May, Southwest flew more passengers than any other carrier.