"At that point Ms. Obioma was lost, confused and disoriented. Her mind went blank and she was utterly befuddled," according to the complaint.
Obioma explained that she was taking her children to school in Canada for the first time, and that they had appointments they could not miss. Despite her situation, crew members refused to let Obioma back onto the aircraft and removed the entire family from the flight.
"Ms. Obioma watched her minor children marched out of the aircraft like criminals, confused and perplexed . . . She sobbed uncontrollably for a long time," the complaint says, adding that the children, who were seated in the economy cabin, were humiliated.
United Airlines's media office did not immediately respond to a request for comment Saturday. In a statement to the Houston Chronicle, a spokesman said the company has not been served with the lawsuit and is unable to comment because of the pending litigation.
The lawsuit alleges that United Airlines discriminated against Obioma and her children during the incident on March 4, 2016 at George Bush Intercontinental Airport in Houston because they were black. It also accuses crew members of singling out Obioma, not because she was being disruptive, but because a white man - who refused to sit in his own assigned seat - did not want to share a plane with her.
The mother and her children waited for five hours before they could get on another flight and missed their scheduled appointments. Obioma also incurred more expenses, the lawsuit says.
The lawsuit is just the latest black eye for United when it comes to customer service issues.
In April 2017, a viral video showed Chicago airport security officers forcibly dragging a passenger from a flight. The removal of David Dao, who was seen with a bloodied mouth in the video, resulted in the firing of two airport security officers and suspension of two others. Dao reached an undisclosed settlement with United a few weeks after the incident, according to the Associated Press. Last month, one of the fired security officers, James Long, sued United and the city of Chicago, claiming he wasn't properly trained to deal with the situation and that he had been defamed, CBS reported.
Then in July, a passenger had to hold her 2-year-old son in her lap for four hours because the airline had sold his seat to a standby passenger.
And in March, a passenger's 10-month-old puppy suffocated to death after a flight attendant forced the owner to place it in an overhead compartment.