Sorry, just don't see that happening. Airlines have consistently and strongly come out against any government imposed additional fees on tickets. Also, any PFC increase has to be approved and used for new improvement projects. DTW would just propose a train between the terminals or something else to justify the increase. No way is DL going to get onboard with that.

http://www.bloomberg.com/news/2011-0...rt-demand.html

Delta spokeswoman Betsy Talton yesterday referred to a letter Chief Executive Officer Richard Anderson wrote to passengers in the January issue of the company’s in-flight magazine, Sky. Anderson wrote that an increase to $7 would increase ticket prices to an average of $112 per trip for a family of four.

“Increasing the PFC tax would add unnecessary costs for customers and have the very real potential of hampering the industry’s returning demand,” he wrote.