Today, Prince George, second in line to the British throne, celebrates his 12th birthday, on July 22nd, 2025 — a joyful occasion for the royal family, but one that also brings a weighty decision rooted in tradition.

As George reaches this milestone, he also steps into a centuries-old royal protocol that may change how he travels with his father, Prince William, and grandfather, King Charles III. According to long-standing royal precedent, heirs to the throne must not travel together on the same aircraft once the eldest child turns 12.

This rule, designed to safeguard the line of succession, ensures the monarchy’s continuity in the tragic event of an aviation disaster. And for Prince George, this tradition now takes on personal significance.

The origins of this rule lie in the monarchy’s responsibility to protect its future. When Prince William turned 12 in 1994, the protocol was strictly enforced. He began flying separately from his father, then-Prince Charles, even as his mother, Princess Diana, and younger brother, Prince Harry, continued to travel together.

Graham Lurie, former royal pilot to King Charles, recalled in a 2023 episode of the Right Royal podcast:

“We flew all four — Charles, Diana, William, and Harry — until Prince William turned 12. After that, William flew separately, usually on a smaller aircraft.”

Exceptions could be made, but only with written permission from the Queen. These rare approvals allowed the family to occasionally travel together while William was still young, but the general rule remained firm — and still applies today.

Currently, King Charles and Prince William do not fly together to preserve the immediate line of succession. Now, with Prince George turning 12, the same rules would prohibit him from boarding the same flight as either his father or grandfather — unless explicitly authorized by King Charles III.

Historically, Prince William and Princess Catherine have traveled internationally with their children, including memorable royal tours to Australia in 2014, Canada in 2016, and Germany in 2017. These trips required the late Queen Elizabeth II’s consent, given they broke with tradition.

Whether William and Catherine will now seek a similar exemption for George is uncertain. But given their dedication to providing their children with a grounded, family-centered upbringing, sources suggest they may consider bending tradition once again.

Still, the decision carries complications.
Separate travel arrangements for George would mean added costs, extra security, and increased logistical complexity, including the need for additional aircraft and personnel.

As for Princess Charlotte, aged 10, and Prince Louis, aged 7, it’s unclear if the rule will apply as strictly when they turn 12. Since they are third and fourth in line, the risk to the succession is considered lower, and tradition may not require the same precautions.

Nonetheless, George’s position as second in line makes his travel arrangements a matter of constitutional importance.

This protocol is one of many that illustrate the monarchy’s focus on preparedness and continuity. Others, such as the requirement for all royals to travel with a black outfit, stem from somber moments in royal history — like when Queen Elizabeth II learned of her father’s death while abroad in 1952, without mourning attire.

Yet as times change, some of these traditions are increasingly seen as outdated. Prince William and Princess Catherine have already shown a willingness to modernize royal life — including their move to Adelaide Cottage in Windsor in 2022, a deliberate choice to give their children a quieter, more grounded upbringing away from the formalities of Kensington Palace.

As Prince George turns 12, the world celebrates not only a royal birthday but a symbolic step toward his future — where tradition and modernity continue to shape the life of a young boy destined to be king.