Jack Aitken started karting like many other drivers, competing in championships around the United Kingdom, but mainly at Buckmore Park in Kent.
He entered Dunlop Intersteps Championship with Fortec Motorsports in 2012 , earning 2 wins and 13 podiums placing him 3rd.
In the following year, he raced in Formula Renault, both Eurocup and Northern European Cup. Aitken was only a guest driver for the European cup, therefore ineligible to score points but in the Northern cup, he finished 2nd with 230 points. Fortec Motorsports retained Jack for another year, allowing him to compete in the European championship full time. This time, he finished 7th with a win and 4 podiums. For the following year, he switched teams to Koiranen GP competing in European cup and Formula Renault 2.0 Alps. Here, he finished both in 1st with 206 and 242 points respectively.
Also during 2015, Jack Aitken competed in Pro Mazda Winterfest with Team Pelfrey. He earned 3 wins and 4 podiums meaning he had 167 points. This gave him the championship win that year.
For the next year, he competed in many different championships: GP3, Euroformula Open Championship, Spanish Formula 3 Championship and Formula V8 3.5 Series. In GP3, Jack drove for Arden International and in the others he drove for RP Motorsport. His win and 7 podiums in GP3 meant he finished 5th in the standings. In the others, he finished 8th, 7th and 15th respectively.
Jack stayed in GP3 for another year but this time with ART Grand Prix, driving alongside Nirei Fukuzumi, George Russell and Anthoine Hubert. He achieved a win and 6 podiums, meaning he finished 2nd in the standings behind George Russell.
FIA Formula 2 Championship
Aitken made his Formula 2 debut with ART Grand Prix alongside George Russell. In his debut season, he won a race and got 2 podiums, leaving him with 63 points and 11th in the standings.
For the next season, he moved to Campos Racing, amassing 3 wins and 7 podiums. He won in his home race in Silverstone during the sprint race, overtaking Louis Delétraz.
For the 2020 season, it was announced that he would be driving for Campos Racing for another year alongside Guilherme Samaia.