For the 2016 season, Ilott switched to Van Amersfoort Racing alongside rookies Pedro Piquet, Harrison Newey and Anthoine Hubert.

Ilott took his first Formula 2 victory at the delayed season's opening race at the Red Bull Ring after pole sitter Zhou suffered electrical problems.

[17][18] Ilott ended the season with 3 wins, 5 poles and 6 podiums, finishing runner-up to fellow FDA driver Mick Schumacher.

Ilott reunited with his former team Charouz Racing System for the first day of the Formula 2 2020 post-season test in Bahrain.

[19] Ilott was inducted into the Red Bull Junior Team in 2015 prior to his FIA Formula 3 European Championship debut,[20] however he was dropped from the programme at the end of the year following a winless campaign.

[3] Ilott had his first experience in a Formula One car during the 2019 in-season test at the Circuit de Barcelona-Catalunya, driving the Alfa Romeo Racing C38.

[27] Ilott was recalled by Alfa Romeo to serve as their reserve driver for the 2022 Miami Grand Prix.

[29] He made his debut at the Grand Prix of Portland, where he finished 25th, only completing 77 of the 110 laps due to a mechanical failure mid-race.

[35][36] Following a crash in the 106th Running of the Indianapolis 500, Ilott broke his right hand and was not given medical clearance to race in the Chevrolet Detroit Grand Prix, which took place the following weekend.

[41] On 28 July 2022, it was announced that Ilott has signed a two-year extension with Juncos Hollinger Racing, keeping him with the team through the 2024 season.

[44] Ilott continued to finish towards the bottom in all the practice days in May, before Juncos Hollinger Racing decided to switch the chassis.

On October 26, Ilott and Juncos Hollinger Racing announced that they had mutually agreed to part ways after more than two seasons together.

[46] Ilott made a brief appearance in the 2024 season with Arrow McLaren, driving at the opening race in St. Petersburg, whilst deputising for David Malukas who suffered a wrist injury in a mountain biking accident.

[49] In February 2021, Ilott signed with Italian outfit Iron Lynx to compete in the 2021 GT World Challenge Europe Endurance Cup, driving the No.

[52][53] Ilott contested the first round of the 2021 Intercontinental GT Challenge, the 24 Hours of Spa, with Iron Lynx Motorsport Lab in the No.

Ilott, alongside Antonio Fuoco and Alessio Rovera (later replaced by Davide Rigon), were announced as drivers in the No.

[55][56] After failing to secure a full-time IndyCar seat for 2024 having been dropped by Juncos Hollinger Racing last minute, Ilott moved to the FIA World Endurance Championship for his campaign, piloting the 12 car for Jota Sport sponsored by Tom Brady, alongside Norman Nato and Will Stevens.

He showed great speeds in the qualifying sessions, always starting off the weekend on a high but continuing with the lowest lows, like crashing out in the last minute of the second practice of Le Mans, leading to the complete change of chassis in mere days, which not only made the team miss Hyperpole but also start on the backfoot.

He then crashed out of the race at the 6 hours of Sao Paolo after coming out of the pits, sending the car back into the garage, leading them to finish last in class.

The unfortunate events followed him to the Circuit of the Americas, where the car suffered an electrical issue 2 hours into the race, which they couldn't fix in time.

The next and last race of the season is the 8 hours of Bahrain, which the team contends as the crowned FIA World Cup champions.