A Frontier Airlines flight bound for Vegas from Philly made an unscheduled stop in Denver … after 2 women got into a foul-mouthed rant

The women were actually traveling together, when an argument erupted and they took to the aisle.

The screaming became ear-shattering and other passengers eventually got involved.

At least one passenger was hit in the head during the melee.

The plane was diverted to Denver and the 2 women were taken off the plane by cops.

The FBI was alerted as well. It’s unclear if they were arrested or will face criminal charges.