The three biggest U.S. airlines have asked the Obama administration to set new limits into the flight operations of three major airlines based in the Persian Gulf, citing unfair business advantage as among the reasons.

The complainants are Delta, the American Airlines Group Incorporated and the United Continental Holdings Incorporated. They accusing Emirates, Qatar Airways Limited and Etihad Airways of receiving huge and unfair backing from Gulf countries in terms of subsidies and flight schedules.

Like Us on Facebook

The international airlines in the United States say the United Arab Emirates and Qatar have given the firms Emirates, Etihad and Qatar Airways over US$42 billion in total subsidies and other unfair benefits.

The three Gulf airlines also enjoy a combined 25 daily flights to the United States from their home countries, while the American carriers only have two trips to each of these countries in a day.

Now the American firms are asking the White House to keep the three gulf airlines from expanding its flights further across the United States.

American Airlines Chief Executive Officer Doug Parker says the United States should cap the Gulf airlines' flights at current levels, while reviewing the aviation treaties with their home countries.

Delta Airlines Chief Executive Officer Richard Anderson notes,"There's a reasonable remedy that still positions those carriers to be able to operate. We're espousing a more level playing field, given the huge size of the subsidies."

The State Department says it is reviewing the recommendations of the American airline companies.

These companies have also given European Union regulators a copy of their reports.

Meanwhile, the three airlines in the Gulf region deny the statements on subsidy given by the three American carriers.

Emirates President Tim Clark says they are preparing a response to the accusations.

"I expect that once we have done that, we will be given the benefit of an apology from the people who have actually made these allegations," said Clark.

Tagsdelta, American Airlines, United Continental, emirates, Qatar Airways, etihad, Airlines