HIGH-flying Pippa Middleton, the sister of the Duchess of Cambridge, shocked fellow passengers when she checked in for a budget flight at a Scottish airport.
The younger Middleton sister was snapped checking in for a low-cost service FlyBe at Inverness Airport with boyfriend Nico Jackson at about 5pm on Sunday.
The pair, who are rumoured to be engaged, were spotted joking with friends at the check-in desk.
The group were believed to be returning to London after a short break in the Scottish Highlands.
Pippa wrapped up for the chilly weather by wearing tight red jeans, a green coat, scarf and brown ankle boots.
One shocked passenger said: “I was pretty surprised to see them.
“You don’t really expect the sister of royalty to travel on an economy flight.
“There were around five or six of them and they all looked pretty relaxed.
“Pippa looked nice - as she always does.
“It seemed like everyone had enjoyed their holiday.”