According to Ms Gorman, during boarding the attendant said over the tannoy: "If your seatbelt isn't tight, you fucked up".
According to reports, the attendant will be "held out of service" till the investigation takes place.
Erika Gorman said she was flying on United flight 4689 from Denver to North Dakota on Thursday when the flight specialist moved toward becoming "bellicose" and utilized irreverence while tending to travelers.
Passengers aboard a flight headed to North Dakota on Thursday afternoon are being refunded after they were forced to deal with a drunk flight attendant. The safety of our passengers and crew is our and United's top priority, ' the company said.
The crew member, who has not been identified, was not arrested upon landing but has been removed from service while an investigation is underway.
As per Flight Stats, a plane-following site, the flight left at its planned time of 2:06 p.m. furthermore, touched base on time at around 4 p.m., all circumstances nearby.
Gorman claims the flight was met with cops and an ambulance upon touchdown.
A passenger tweeted: "Drunk and disorderly - belligerent flight attendant". Drunk or stoned stewardess endangered everybody's lives. When they landed, the police authorities were already waiting.
In March, a French Bulldog died after a flight attendant adamantly instructed an unnamed passenger to store her carrier - with the pet inside - in an overhead storage bin for the duration of the flight.
United responded to Erika's Tweets asking for more details and later apologised to the customers on-board, saying it is refunding all of their airfares "as a gesture of goodwill".
Alexandra Deabler is a Lifestyle writer and editor for Fox News.