Former Black Eyed Peas singer will.i.am was angry after United Airlines gave away the seat he had booked on a flight from New York to China because he arrived late.

The singer launched into a tirade of abuse aimed at the airline on Twitter to share his dissatisfaction with his 12.5 million followers, reports dailystar.co.uk.

"Make sure when you fly China via @United you get to the airport one day before because they'll give your seats away," he said.

"I'm flying to China and @United just gave my seats away... #WTF," he added.

The angry chart-topper continued his online moan by tagging all of the other airlines he's flown with in a bid to shame United into letting him on the plane.