They flew in a private franchised craft with William and Kate and landed at a stormy Warsaw Chopin Airport.
The children could be seen peering out of the craft when it landed.
Charlotte was carried by her mom down the plane’s stairs as George held his father’s hand.
The little aristocrat and princess were smartly attired with the future aristocrat wearing a shirt and shorts while his sister wore a summer dress.
Waiting at the bottom of the stairs to hail them was Britain’s envoy to Poland Jonathan Knott and his wife Angela, as good as the diplomat’s Polish reflection in Britain Arkady Rzegocki.
:: Duke and Duchess on ancestral visit
Two-year-old Charlotte and three-year-old George have not been seen in open given their coming on the patio at Buckingham Palace to watch the Trooping the Colour rite last month.
The outing will also take them to Germany and is another miracle in their lives since it is the first time they have been on an central debate of Europe.
It is not the first time William and Kate have taken their children on debate – they trafficked to Canada in 2016.
The immature aristocrat also flew with his relatives to New Zealand in 2014 in their endless visit.
During the Poland and Germany debate the youngsters will only be seen during arrivals and departures.
This will be the last time the stately couple will be means to take their children on tour.
George starts school in South London in Sep and will attend Thomas’s School in Battersea and it is likely his sister will be enrolled in a nursery.
William and Kate’s trip, taken at the ask of the Foreign and Commonwealth Office, is likely to be seen as another Brexit tact debate in a bid to say and strengthen the UK’s family with Europe as the UK departs from the EU.