They will attend a commemorative service, followed by a flypast including up to 100 aircraft.
Prince William formerly served as an RAF search-and-rescue pilot, while Prince Harry received helicopter training from the RAF during his time in the Army Air Corps. William was the fourth successive generation of the monarchy to become an RAF pilot.
The visit is their first trip overseas as a married couple, following their wedding in May. They will go on to a garden party at the Glencairn House - the United Kingdom embassy in Dublin.
The Duchess of Sussex wore an olive green dress by Ralph Lauren.
The 36-year-old brunette joined the rest of the royal family on the palace balcony, her second appearance there following Trooping the Colour in June.
The Duchess appears to have just removed her hat from her earlier ensemble and left her hair in a low bun with the same bronzed, dewy make-up.
Duchess of Sussex changes into third outfit of the day for summer garden party in Dublin.
The Duchess of Sussex looked stunning in a demure, belted black dress from Dior with her favored boatneck neckline and a wild, Stephen Jones fascinator that she makes look chic.
The Duke and Duchess will also visit DogPatch Labs, a co-working space for technology start-ups, where they will meet children and young people taking part in workshops, and talk to female tech entrepreneurs.
According to Kensington Palace, "They are looking forward to learning more about Ireland's history and experiencing its rich culture, as well as meeting the people who are shaping the country's future".