A list of all domestic airlines is available at JohnnyJet.com, BTS.gov and Wikipedia.org, as of March 2015. Johnny Jet's list is of the major U.S. airlines and their phone numbers, while Wikipedia's list also includes small airlines.
The Bureau of Transportation Statistics uses a drop-down menu to list the major U.S. carriers, and the information it provides includes number of passengers, departures and air cargo by month.
Wikipedia's list includes the smallest charter airlines and the biggest international airlines. Information within the list includes call signs and hubs. The smaller airlines conduct feeder operations for shipping companies, and others conduct services for the U.S. Department of Defense.