PORTLAND, Ore. — A plane headed for Las Vegas from Seattle was diverted to Portland on Thursday afternoon after at least one passenger said a couple tried to join the “mile high club.”

US Airways Flight 1473 left Seattle at 2:58 p.m., but a pair of unruly passengers caused it to be diverted and head for Portland International Airport.

The flight landed in Portland at 5 p.m. and a spokeswoman for US Airways said two people were escorted off the plane after a dispute with flight attendants.

“The people across the aisle from us were fooling around in their seats and they decided to go to the bathroom and fool around and they threatened the flight attendant,” said passenger Jessica Smith.

US Airways avoided confirming that the couple was fooling around, but did say they were arguing with the crew.

A PDX spokesperson said the passengers were neither cited nor arrested, but they were left in Portland, Ore.

The plane continued on to Vegas, where it was scheduled for a 7:39 p.m. landing.