Analysis of information sources in references of the Wikipedia article "Effect of low-cost airlines on communities" in English language version.
The effects of other low-cost and ultra-low-cost carriers on average airfares at U.S. airports now exceed the Southwest effect. In 2012, the presence of JetBlue Airways, another low-cost carrier, was associated with a decrease of about $32 in average one-way fare, controlling for average itinerary distance and other low-cost carrier competition. In the same year, Allegiant Air service was associated with an average one-way fare decrease of about $29, and Spirit Airlines service was associated with a decrease of about $22. However, it is important to note that these latter carriers often charge ancillary fees in addition to the base airfare, so a comparison of changes in base airfares alone does not fully capture differences in total travel price.
{{cite book}}: |work= ignored (help)You might want to start calling it the "JetBlue effect."...Southwest's fabled ability to lower fares by its mere presence in a market has diminished..JetBlue, meanwhile, and ultra-low-cost carriers such as Allegiant and Spirit have shown a greater impact on lowering the average price of a ticket where they fly.