In 2020 Chadwick was awarded her first 10 of the 40 points needed to qualify for a Formula 1 super licence, having finished fourth overall in the 2019-20 F3 Asian Championship.

In March 2019, Chadwick was announced as one of the entrants for the inaugural season of the W Series, and followed this by participating in the opening three races of the 2019 F3 Asian Championship. Chadwick was also announced as an official junior driver for Aston Martin Racing, extending an existing unofficial relationship that dated back to 2014. At the first W Series race at Hockenheim, Chadwick put in a dominant performance, leading both practice sessions and qualifying on pole. Despite briefly giving up the race lead to Alice Powell, Chadwick came from behind to take the first win in W Series history. Two weeks later at Zolder, Chadwick again started on pole, however lost the lead to Beitske Visser from the start, and had to fight off Powell after locking up and running wide later in the race, ultimately holding onto second place.

At Assen, Chadwick started and finished in third after again holding off late pressure from Visser. In the non-championship reverse grid race the following day, Chadwick fought through the field to finish eighth after starting from the back of the grid. Chadwick then entered the 2019 24 Hours of Nürburgring with Aston Martin, racing alongside Alex Brundle and Peter Cate in the Aston Martin Vantage AMR GT4, finishing first in the SP8 class and twenty-seventh overall. Chadwick entered the W Series championship decider at Brands Hatch with a 13 point lead on second placed Visser, and proceeded to start on pole for the third time. Despite defending the lead initially, she lacked race pace and lost positions to Powell, Emma Kimiläinen and finally Visser, however her eventual fourth placed finish was enough to hold off Visser and win the inaugural W Series title.

Chadwick also entered the 2018 24 Hours of Nürburgring, driving the Aston Martin Vantage V8 GT4 in the SP8 class alongside Jonathan Adam, Alex Lynn and Pete Cate. The team finished fifth in class and sixty-third overall.

Chadwick proceeded to sign on for the 2018-19 MRF Challenge season in November 2018, and topped both initial practice sessions. Chadwick had success in the early rounds of the championship, finishing second in three of the five races in the opening weekend in Dubai. She followed this up with wins in six of the remaining ten races at Bahrain and Chennai to take the title, becoming the first ever woman to win the MRF Challenge. Chadwick also participated in two test drives with the NIO Formula E team in Riyadh and Marrakesh.

Chadwick moved into single-seater racing in 2017, joining Double R Racing to compete in the 2017 BRDC British Formula 3 Championship. She achieved her first and only podium of the season with a third place finish at Rockingham in the fifth round of the championship, ultimately finishing ninth overall for the season. For the 2018 season, Chadwick remained in the BRDC British Formula 3 Championship, moving to Douglas Motorsport. In August, she became the first ever woman to win a British F3 race by claiming victory in the second race at Brands Hatch, and finished the season in eighth place.

Going into 2016, Chadwick stayed in British GT Championship, driving in the GT4 pro class with Generation AMR SuperRacing for the first, second and sixth rounds., before returning to Beechdean Motorsport to race in the pro-am class with Paul Hollywood for the final three races of the season. Chadwick ultimately finished fifteenth in the championship.

Chadwick also competed in race 9 of the 2016 VLN season, driving the Nexcel AMR Aston Martin GT8 and finishing third in the SP8 class.

In March 2015, Chadwick was announced as one of the drivers for Beechdean Motorsport in the 2015 British GT Championship, competing in the GT4 class. Chadwick and her co-driver, Ross Gunn, took two wins and five podiums during the season in their Aston Martin V8 Vantage, including a win in the Silverstone 24-Hour race. This made Chadwick the first female and youngest ever champion of the British GT Championship.

Jamie Chadwick started her motorsports career in kart racing at the age of 11, following her brother Oliver into the sport. She broke into car racing in 2013 when she turned down a trial with the England under-18 hockey team to compete at the Ginetta Junior scholarship weekend, where she triumphed to win a scholarship for the 2013 Ginetta Junior Championship season. Chadwick raced alongside her brother for the JHR Developments team, finishing tenth in the championship. She remained in the series for 2014, taking five podium finishes during the year to finish eighth overall in the championship.

Jamie Laura Chadwick (born 20 May 1998) is a British racing driver currently competing in the F3 Asian Series and the W Series. She won the inaugural W Series championship in 2019, and joined Williams Grand Prix Engineering as a development driver in the same year.