Though hand luggage and baggage allowances are the norm for most travellers, for the Royal Family they are unheard of.
Instead, the royals need not worry about cramming everything into one suitcase.
In order to keep her most special items of clothing safe, Kate’s team are frequently seen carrying clothes covers to and from planes.
However, unlike a standard clothes cover, these zip-up protective bags have an extra special feature fit for a royal.
READ MORE: Prince Charles: Does he really pack a toilet seat when travelling?
“Monogrammed luggage is traditional among the upper classes,” she explained.
“The real elite traveller prefers small and discreet lettering, rather than big bold colours.”
The colour-coded system is also common amongst the Royal Family, who also use it for luggage tags so that baggage mix-ups are never a worry.
Queen Elizabeth’s bags are always marketed with a yellow bag tag, with Kate Middleton also known to use yellow tags.
As part of a Channel 5 documentary, a Royal Correspondent revealed some of the exclusive treatment the Duchess’ dresses get.
Speaking on ’Secrets of the Royal Flight’, Emily Andrews said: “Obviously when we go to the airports, especially when it’s hand luggage only, we’re trying to cram all our toiletries into that plastic bag,” she said.
However, Ms Andrews says she has “been on a plane where Kate’s dresses had their own seat to make sure they were kept flat.
“They are not going to be shoved in the hold just to be squashed by everyone else’s.”