The best replacement for southwest is delta.

The best alternatives to southwest are rated as following:
★★★★★  delta
★★★★★  jetblue
★★★★  united
★★★  south west
★★★  airtran
★★  us airways
★★  american airlines
★★  frontier
★★  spirit
★  continental
★  virgin america
★  southeast
★  airlines
★  virgin
★  midwest
★  alaska airlines
★  northwest
★  alaska
★  braniff
★  chase sapphire
  united airlines
  frontier airlines
  jet blue
  southwestern
  singapore airlines
  air tran
  airtran better
  shuttle by united
  west
  venture card

Your alternative for southwest is not listed? Suggest!
Speaking about southwest, one probably shouldn't forget about printing my boarding pass.

Other search terms related to southwest and their ratings are:
★★★★★ printing my boarding pass
You have in mind a companion for southwest and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of southwest in all years. Click on graph for more.
southwest
delta
jetblue