Hawaiian Airlines and two other carriers were fined by the U.S. Transportation Department for violating consumer regulations.

Hawaiian Air and Tempe, Ariz.-based US Airways didn't tell consumers when flights they sold were being operated under a code-sharing agreement with other carriers, Transportation Department officials said in a statement yesterday.

Code-sharing allows airlines to sell tickets for one another's flights.

Hawaiian was fined $50,000, while US Air was ordered to pay $70,000.

Hawaiian issued a one-sentence statement saying, “;We are aware of the reasons for the action taken by the U.S. Department of Transportation and have already taken the necessary steps to rectify the situation.”;

Houston-based Continental Airlines was fined $75,000 because advertised fares on its Web site that did not reflect the entire cost of the ticket, the federal agency said.

“;Continental has always disclosed the full fare, including taxes and fees, prior to purchase and at no time did a customer purchase a ticket or provide credit card information without being advised of full taxes and fees,”; spokeswoman Mary Clark said in an e-mailed statement.

US Airways, the smallest of the full-fare U.S. carriers, has added a “;pass-fail assessment”; on code-sharing disclosures for its reservations agents in response to the Transportation Department's findings, which applied to personnel selling tickets on the phone, said Morgan Durrant, a spokesman for the airline. The airline might appeal the fine, he said.