![](https://www.cpr.org/cdn-cgi/image/width=3840,quality=75,format=auto/https://wp-cpr.s3.amazonaws.com/uploads/2021/10/20211020-DIA-FRONTIER-JET-TAX-CONTROL-TOWER-1.jpg)
Two ultra-low-cost airlines may become one. Denver-based Frontier – the one with wildlife on its tails – intends to merge with Spirit– all clad in yellow. It’s a $6 billion deal. But it’s not guaranteed to get off the ground. We get perspective from Washington Post transportation reporter Lori Aratani.