The airplane came within seconds of landing but the pilot had to pull away again and re-approach when the coast was clear.
The Duke and Duchess of Sussex are on a 16-day tour through Australia, Fiji, Tonga and New Zealand, and were on the specially-chartered Qantas flight late Friday, local time, with their traveling cohort of staff and journalists.
BBC journalist Simon Atkinson posted a dramatic video of the first attempted landing.
An announcement from the flight deck said: “There was an aircraft on the runway a little slow to roll … so the decision was taken to abort the landing,” the BBC reported.
The royal couple left Tonga earlier that day, after a colorful and joyful visit.
The royals are spending the weekend in Sydney for the closing of the Invictus Games, for wounded, sick and injured veterans and armed forces members.