The Department of Transportation is telling airlines they have to be honest in their advertising.

Beginning Jan. 24, the Transportation Department will enforce a rule requiring that any advertised price for air travel include all government taxes and fees. For the last 25 years, the department has allowed airlines and travel agencies to list government-imposed fees separately, resulting in a paragraph of fine print disclaimers about charges that can add 20 percent or more to a ticket’s price.

Some airlines are suing to stop the rules on the grounds the government is violating their First Amendment free speech rights.

Is it possible for these companies to get any more contemptuous of their customers?