Kate Middleton and Prince William were just spotted aboard another commercial flight with their three kids

Royals, they're just like us!

The Cambridge family has said goodbye to summer and returned home from their weeklong visit to Balmoral Castle, Scotland with Queen Elizabeth and Prince Philip. According to reports, Prince William, Duchess Kate and their three children flew commercial back to Norfolk, England, which is just miles from their Anmer Hall country home.

Photos published to The Mirror show the family-of-five being escorted across the tarmac by the airport security team.

"It's always a great privilege to welcome any member of the royal family to our airport and we are always happy to welcome them," said Richard Pace, managing director of Norwich Airport to Eastern Daily Press.

The royal spotting comes just a week after the family was spotted aboard another budget aircraft bound for Aberdeenshire. Footage taken from the tarmac showed a baby Prince Louis in Kate Middleton's arms and Prince William holding Prince George's hand. Princess Charlotte and the family's nanny Maria Borrallo were also seen in the photos.

"The family were sat right at the front. I fly this route all the time and we were non the wiser. No-one knew they were on the flight," explained a passenger of the royal sighting on the way to Scotland. "Later on I realised that Kate's mother was sat a few rows in front of me."

It's been a busy summer for Princess Charlotte and Prince George, who will be starting his second year at Thomas's Battersea in London next week. Charlotte, 4, will join her big brother for the first time.

RELATED: Kate Middleton glows for church outing with queen

While the royal family has laid low for the summer season, royal fans were treated to a few royal appearances, most recently at a charity sailing match held in honor of Kate Middleton and Prince William's favorite charities. While Prince George showed off a new toothless grin, it was Charlotte's sassy demeanor that stole the show.