Twitter user Erika Gorman wrote that the flight attendant was "drunk and disorderly" and "belligerent."
United told Business Insider it compensated all of the passengers on the flight "as a gesture of goodwill."
A flight attendant on one of United Airlines' regional carriers, Trans States Airlines, was reportedly "drunk or stoned" on a recent flight, according to ABC affiliate WDAY.
The incident occurred on a United flight operated by Trans States from Denver to Williston, North Dakota, on Thursday.
"Boarding announcements were 'if your seatbelt isn't tight, you F^*%ed up,'" Gorman wrote.
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Gorman also wrote that she went to the cockpit to speak to the captain. Police were present when the flight landed, she wrote.
A Trans States Airlines spokesperson told Business Insider the airline "is aware of reports of erratic behavior by a flight attendant on flight #4689 from Denver to Williston." The spokesperson also said the flight attendant is not working on Trans States flights while the airline investigates the incident.
A United Airlines spokesperson told Business Insider it is also aware of the incident. The spokesperson said the airline compensated all of the passengers on the flight "as a gesture of goodwill."
"We apologize for any inconvenience or distress this may have caused," the spokesperson said.
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