Jasmine Harrison completed the 3,000 Talisker Whisky Atlantic Challenge yesterday - finishing in 70 days, three hours and 48 minutes.
The part time swimming teacher and bartender set off from the Canary Islands on December 12 and arrived into Antigua in the West Indies.
"It's the best experience a young person could ever want or have," Ms Harrison said.
"I would do it again but at the same time I would rather have other people regardless of age doing it so if I have inspired someone out there - I'm happy!"
There were 21 entrants from across the world, including crews of four men, all women boats and solo competitors.
Ms Harrison supported charities including Shelterbox, which helps provide emergency shelter to families around the world, and which she was inspired to support after witnessing hurricane damage on an earlier visit to the Caribbean.
Carsten Heron Olsen, chief executive of Atlantic Campaigns, said Ms Harrison had shown "incredible strength and endurance".
"Every year we are amazed by the grit and determination shown by teams that take on the Talisker Whisky Atlantic Challenge and this year is no different," he said.
Ms Harrison was moved to compete in the challenge after she witnessed the finish of a previous race in Antigua in 2018. Chatting to a member of a support team in the harbour, she had been inspired by their mission.