According to the palace, the AW139 helicopters operate using up to a 50 percent blend of Sustainable Aviation Fuel (SAF) — the maximum currently allowed under industry standards. Officials argue this reduces dependence on more expensive fixed-wing aircraft.
The chief executive of the British Helicopter Association has also backed the royal household, claiming King Charles is “leading by example” when it comes to greener aviation. He added that the royal flight team actively seeks out airports that can supply SAF, even when it comes at a higher cost.
Royal travel is funded through the Sovereign Grant, which has risen sharply — increasing from roughly $109 million last year to about $167 million for 2025–26. According to the latest report released in June 2025, 141 helicopter journeys cost around $603,000, with only four flights exceeding $21,500.
A royal aide dismissed claims of excess, arguing the increased mileage actually reflects smarter use of resources rather than extravagance.
“If you’re going to make an investment of that magnitude,” the aide said, “then you need to sweat the asset.”
Still, with environmental concerns growing and public scrutiny intensifying, the royal family’s helicopter miles — and the palace’s firm defense — are unlikely to stop sparking debate anytime soon.
