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The Cambridge family have flown to Scotland on a budget flight just days after Meghan Markle and Prince Harry were criticised for their use of private planes.

Kate and William were seen walking onto the FlyBe plane with Prince George, Princess Charlotte and Prince Louis this morning.

They boarded the 8.45am economy flight from Norwich to Aberdeen, reports Mail Online .

Video shows George and Charlotte walking ahead with their dad, who is holding a number of bags, while Kate carries baby Louis slightly behind.

A fellow passenger told the Mail: "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.

(Image: Getty Images)

"Later on I realised that Kate’s mother was sat a few rows in front of me."

A flight for the same time next week would set you back £73. The journey takes an hour and 10 minutes.

George is on his summer holidays from school at the moment, with Charlotte join to start in Reception next month, so it's likely that the family are taking a final holiday before term resumes.

It's not the first time Royals have used budget airlines to travel, and in 2011 Prince Harry boarded an EasyJet flight from Edinburgh to London.

The photos come just says after Prince Harry and Meghan Markle were heavily criticised for taking four private planes in just 11 days.

They were labelled hypocrites for opting to fly privately while using their influence to preach about the environment.

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(Image: PA Archive/PA Images)

The couple took Archie for his first holiday to Ibiza, followed by a quick break to Sir Elton John's stunning French villa in Nice.

According to Sir Elton, who organised the flight, it was 'carbon neutral' however it has been estimated that the 12-seater plane used seven times the emissions per person compared to a commercial flight.

However a number of celebrities have jumped to their defence, including a powerful statement from Sir Elton referencing Princess Diana .

He wrote: "I am deeply distressed by today’s distorted and malicious account in the press surrounding the Duke and Duchess of Sussex’s private stay at my home in Nice last week.

(Image: (Credit too long, see caption))

" Prince Harry ’s Mother, Diana Princess Of Wales was one of my dearest friends. I feel a profound sense of obligation to protect Harry and his family from the unnecessary press intrusion that contributed to Diana’s untimely death.

"After a hectic year continuing their hard work and dedication to charity, David and I wanted the young family to have a private holiday inside the safety and tranquility of our home.

"To maintain a high level of much-needed protection, we provided them with a private jet flight. To support Prince Harry’s commitment to the environment, we ensured their flight was carbon neutral, by making the appropriate contribution to Carbon Footprint.

"I highly respect and applaud both Harry and Meghan’s commitment to charity and I’m calling on the press to cease these relentless and untrue assassinations on their character that are spuriously crafted on an almost daily basis."