Coulter was on Delta Airlines flight 2862 from New York City's LaGuardia Airport to Palm Beach International Airport in West Palm Beach, Fla.
She subsequently detailed how she was asked to move from a seat with extra leg room that she had "carefully chosen in advance and booked", posting a picture of the woman her seat was given to and targeting the airline's employees.
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".
Delta responded via Twitter on Sunday, apologizing for Coulter not receiving her pre-booked seat she paid for and offering a refund.
While people are usually sympathetic to passengers who have high-profile customer service problems with airlines, a lot of people on Twitter were apparently pleased with Coulter's Delta despair. "Here's the woman given my PRE-BOOKED seat".
"We are sorry that the customer did not receive the seat she reserved and paid for".
"@Delta didn't give my extra room seat to an air marshall or tall person".
Delta representative Anthony Black told BuzzFeed News said Coulter did not say anything or complain about the de-seating the entire flight. 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.
"Her actions are unnecessary and unacceptable", continued the statement which was posted on Sunday - more than 24 hours after Ms Coulter's onslaught began.
She tweeted her despair out to her 1.6 million followers, which was something that didn't sit well with the folks at Delta.
This situation, by the way, was not the other passenger's fault, and any sympathy that one might have had for Coulter evaporated when she kept volleying insults about this perceived injustice. Coulter rebutted it cost her $10,000 in time and effort to do all the legwork to ensure she had legroom.
In a separate statement, Delta added, "Each of our employees is charged with treating each other as well as our customers with dignity and respect".