Coulter called the Atlanta-based carrier "the worst airline in America" after a disagreement on Saturday.
The experience was definitely complaint worthy; the 55-year-old said she was moved from her pre-booked, pre-paid seat with extra room to a more cramped seat on a flight from New York City to West Palm Beach, Florida.
When the flight was boarding, Delta said that it "inadvertently moved" Coulter to 15A, another window seat on the same row, in order to "accommodate several passengers with seating requests".
"We're sorry you did not receive the preferred seat you paid for", the airline tweeted Sunday evening in their first public apology, "and will refund your $30".
With that said, Delta had to be aware that what she spewed on Twitter would eventually dribble down to the masses on social media and then flow into the headlines.
Nevertheless, Coulter continued to tweet admonishing content about Delta to her Twitter followers. "Here's the woman given my PRE-BOOKED seat", she wrote. In fact, she was placed in another seat in the same row, switching from an aisle seat to a window seat.
"Her actions are unnecessary and unacceptable", the statement added.
Some time after her flight from NY landed Friday, Coulter began to publicly expose the indignities she had documented on board. Across the United States and much of the world, this is a time of terminal brawls and pre-takeoff walkouts, as frustrated passengers fight back against the airlines with cellphone cameras and viral outrage.
But some thought Coulter's response was warranted - and some admitted they had experienced similar incidents while flying with Delta.
Here are a few tweets where she profusely insulted the carrier, its staff and even the passenger who allegedly took her seat. After almost a day, Delta replied and took her to task on Twitter.
The company said its social media and customer service workers tried several times to contact her to apologize but did not hear from her until Sunday night.
Twitter came out in support of Delta and blamed Coulter for blowing up the issue.
The statement by Delta went on to say that Coulter's behavior had been unacceptable and unnecessary.