American Eagle Flight 3823 from New York to Washington, D.C., was significantly delayed after an argument between two flight attendants.
A spokesperson for the Fort Worth-based airline said no punches were thrown but that words were exchanged during pre-departure checks.
The altercation got so heated that the cockpit crew was alerted and they ultimately made the decision to turn the plane around and head back to the gate.
"We were informed we were going back to the gate because the flight attendants couldn't work with each other," said Dan Alexander. "I find it hard to believe the flight attendants couldn't work with each other for an hour," he added, noting the approximate flight time from New York to Washington.
Passengers then had to wait several hours so the airline could find a replacement flight crew. At 7:46 p.m., the flight finally departed for Washington, D.C., more than four hours after it was scheduled to leave New York.
No passengers were involved in the verbal confrontation, the airline said.
Both American Eagle flight attendants will meet Thursday with their in-flight service supervisor to discuss what happened and any potential discipline actions.