According to the the Times, they (the airlines) are saying nothing.
The math gives me a proposed burn of say 1800 USG from FLL to IAD. The proposed fuel tax on that is currently $450 and with a 250 pct increase only brings us to $1125 which is well below the quoted $1575 figure. Not bad.
Meanwhile we should take great pause when Marion Blakey (current FAA Administrator) says the proposal is "first and foremost of benefit to passengers."
One thing many have learned from her controversial tenure at the NTSB is to take anything that comes out of Ms. Blakey's mouth with more than a few tons of salt.