The Cambridges touched down Tuesday at the Pau Pyrénées Airport in southwestern France. The airport is located 60 miles from the resort area of Biarritz and close to the border with Spain.
It is unclear if the family's Spanish nanny, Maria Teresa Borrallo, accompanied them on the vacation. The couple's royal protection team was spotted at the airport by local press.
The family reportedly traveled in style, borrowing the jet of the duke of Westminster, a billionaire who has previously loaned his jet to the royals.
William and Kate, both 34, have had a busy few months of activities, including the queen's 90th birthday events and Wimbledon. Their public engagements were capped off with a private celebration for George's third birthday on July 22.
The royal family will have time on their vacation to unwind before a busy fall when they will visit Canada. Kensington Palace announced today the Cambridges will visit British Columbia and the Yukon at the invitation of Canada's Prime Minister Justin Trudeau.
"The Duke and Duchess are delighted to be returning to Canada. They hold very happy memories from their visit in 2011 - their first overseas tour as a married couple. They are really looking forward to seeing other parts of this beautiful country and having the opportunity to meet many more Canadians along the way," Kensington Palace said in a statement.
It's quite possible that George, 3, and Charlotte, 1, could join them on the trip although an announcement on whether or not the children will come along will likely be made closer to their departure.