An Australian pilot has broken the record for the youngest person to fly a single-engine aircraft solo around the world.

Ryan Campbell, 19, started his flight 10 weeks ago from Wollongong, in southern New South Wales, and has spent 200 hours flying through 14 different countries.

His journey clocked up more than 24,000 nautical miles.

He landed back in Wollongong this morning and was greeted by dozens of supporters and an aerial display by the RAAF Roulettes.

He surpassed the existing record set by 21-year-old American Jack Wiegand earlier this year.

Speaking from Alice Springs before the last leg of his journey, Mr Campbell said although he faced many challenges, there are moments he will never forget.

"I'd come out of cloud and out of ice, stressed and worried, and immediately looked ahead and I just saw the tip of Greenland," he said.

"You know, I'd been over water for hours and here's these massive brown, rugged mountains covered in snow and ice and glaciers."

Mr Campbell will now fly his plane, the Spirit of the Sapphire Coast, back to his home town of Merimbula on the south coast of New South Wales.