American right-wing political commentator Ann Coulter took to Twitter to voice her rage against Delta Air Lines after she was asked to give up her pre-booked seat during a flight at the weekend.

Coulter's online tirade against the company began on Saturday, 15 July, after the 55-year-old had to give up her seat with "extra leg room". She had paid $30 for the additional space during a flight to West Palm Beach, Florida, from New York's LaGuardia airport.

In a series of messages posted on Twitter, Coulter labelled the company as "the worst airline in America".

She then posted a picture of a member of the crew who she accused of "snatching my ticket from my hand & ordering me to move [without] explanation, compensation or apology".

Coulter also posted a picture of the woman who took her seat, claiming the passenger was not "elderly, child or sick," nor "an air marshal or tall person".

A Delta spokesperson said in a statement quoted by the Washington Post that Coulter was moved to another seat "in the same row, just not the exact seat she had selected".

"It was an exit row seat (has extra leg room)," the spokesperson continued. "She was moved from an aisle to a window. Same space, a few seats over."

In response to Coulter's comments, Delta also posted a statement on Twitter, saying it would refund the cost of her pre-booked seat. "We're sorry you did not receive the preferred seat you paid for and will refund your $30," the company said. It added: "Additionally, your insults about our other customers and employees are unacceptable and unnecessary."

However, on Monday Coulter hit back at Delta, claiming it had cost her "$10,000 of my time to pre-select the seat I wanted, investigate type of plane & go back periodically to review seat options".

This is not he first time that Coulter has complained about Delta.

In 2013, she moaned that the company had no "electric outlets" on a plane, tweeting her disapproval using the hashtag #Deltasucks. In 2010, she complained on Twitter about a Delta employee, claiming he deserved "to be the worst employee multiple award-winner."

Ann Coulter
Ann Coulter MANDEL NGAN/AFP/Getty Images