A ranting woman had to be physically taken off a US Airways flight from Philadelphia to Portugal on Sunday night after she became irate and uncontrollable.

The video, taken by another passenger on the flight, was uploaded to Reddit where it has already clocked up more than 375,000 views.

It's unclear why the woman became so angry but apparently she was shouting about how the flight was 'going to Portugal' and 'not Brazil'.

When confronted by cabin crew she became more and more animated until finally the police were called. 

You can hear the woman shouting “You’re a f***ing racist f***ing bigot” at the officer trying to handcuff her. 

“I’m going to sue the s*** out of you!” she says at another point.

Warning: The video contains strong language

The passenger who filmed the bizarre incident explained what he saw before he started to record the event:

"The flight was from Philadelphia to Lisbon, where I am now. It was US Airways Flight 738. We were about 45 minutes delayed to start with, then we boarded, and this woman passed me yelling about how we weren't going to Brazil - that we were going to Portugal (I'm assuming this is because they were speaking Portuguese on the flight, also native to Brazil). She was being very loud, swearing. Overall, you could sense that people didn't feel comfortable around her.

"I'm assuming that a few people must have mentioned to the flight attendant that this woman was being irrational and acting strange, there were children on the flight and some nasty words were being thrown around. Next thing I know there's a police officer standing next to me in the isle (where I'm filming from) and this woman begins to raise her voice more and more while a flight attendant tells her to calm down. I captured the rest on video."