Karting

Delétraz began karting in his native Switzerland 2008, winning the Vega Trofeo Super Mini class the following year.^[2] Third-place finishes followed in the KF3 Bridgestone Cup Switzerland and Vega Trofeo Junior categories in 2010 before winning the latter championship in 2011.^[3]

Formula BMW Talent Cup

Delétraz began his single-seater career in September 2012, racing in the Grand Final of the Formula BMW Talent Cup season, held at Motorsport Arena Oschersleben in Germany. He started each of the three races from Pole position, winning the second race of the event.^[4] In the final race of the weekend, Delétraz collided with fellow Swiss driver Ralph Boschung with both drivers retiring from the race. He was subsequently excluded from the event following an incident in the pit lane after the race.^[5]

Formula Renault 2.0

Formula Renault 3.5 Series/Formula V8 3.5

Delétraz made his debut in the Formula Renault 3.5 Series at the fifth round of the 2015 season at the Red Bull Ring, driving for the returning Comtec Racing team.^[15] He graduated to the series full time with Fortec in 2016, finishing runner-up in the standings.

GP2 Series

On 18 November 2016, it was announced that Delétraz would make his debut in the final round of the 2016 season with Carlin.^[16] He finished 26th in the overall standings with no points.

FIA Formula 2 Championship

Formula One

In February 2016, Delétraz was confirmed as a member of Renault's young driver program.

In November 2018 it was announced that Delétraz would make his Formula One test debut with Haas F1 Team at the end-of-year Young Driver Test in Abu Dhabi.^[20] He completed 117 laps in the second day of the 2 day test.^[21][22]

In May 2019 it was announced that Delétraz would join Haas F1 Team as simulator driver for the remainder of the 2019 season.^[23] Delétraz continued as reserve and development driver for 2020.^[24] However, following Romain Grosjean's crash at the 2020 Bahrain Grand Prix, the team preferred to bring in its other development driver, Pietro Fittipaldi. The Swiss driver criticized this decision on social media. Haas team principal Guenther Steiner brushed off these criticisms, saying Fittipaldi deserved the seat, as he had more Formula One mileage than Delétraz.^[25] Louis Delétraz did not continue as a development driver with Haas for 2021.

2020: Endurance debut

Delétraz competed in the 2020 24 Hours of Le Mans Virtual and won it with Rebellion Williams eSports, driving the Oreca 07 in the LMP category alongside Raffaele Marciello, Nikodem Wisniewski and Jakub Brzezinski.^[26] In the same year, Deletraz also competed in the 2020 with the Swiss outift, Rebellion Racing, in the LMP1 category alongside Nathanaël Berthon and Romain Dumas. The team finished the race in P4.

2021: ELMS glory

In 2021, it was announced that Delétraz would be competing with Team WRT in the European Le Mans Series in the LMP2 category alongside Robert Kubica and Yifei Ye. With three wins and a P2 finish, they clinched the 2021 European Le Mans Series championship in the LMP2 category.^[27] Alongside this, Delétraz competed in the 2021 8 Hours of Portimão in the FIA World Endurance Championship, finishing in P6. Additionally, Delétraz competed in the 2021 24 Hours of Le Mans with his European Le Mans series teammates. After leading the race with one lap to go, the car, with Yifei Ye behind the wheel, stopped down the hill past the Dunlop Bridge because of a broken throttle sensor creating an electrical short circuit that temporarily turned the engine's electronic control unit off. Because of this, the team had to retire the car.^[28]

2022: Successful ELMS title defence

In 2022, it was announced that Delétraz would be competing with the Prema Orlen Team in the 2022 FIA World Endurance Championship^[29] and Prema Racing in the 2022 European Le Mans Series^[30] both on a full season basis. In the 2022 FIA World Endurance Championship, Delétraz finished in P5 in the LMP2 championship with a P2 finish in the 2022 24 Hours of Le Mans. In the 2022 European Le Mans Series however, Delétraz and his teammate, Ferdinand Habsburg clinched the LMP2 Driver's championship with 4 wins and a P3 finish in Spa. Alongside this, he also competed in the 2022 IMSA SportsCar Championship with Tower Motorsport in the LMP2 class.^[31] With two wins in Laguna Seca and Petit Le Mans and three podium finishes, Delétraz finished the season in 7th place with points counting towards the Michelin Endurance Cup, not the overall LMP2 championship.

2023: WEC Title

In 2023, it was announced that Delétraz would be joining the Wayne Taylor Racing squad, driving the Acura ARX-06 GTP entry alongside Filipe Albuquerque and Ricky Taylor. He serves as a third driver, competing in the IMSA Michelin Endurance Cup in Daytona, Sebring and Petit Le Mans.^[32] In the opening race at the 24 Hours of Daytona, Delétraz and his team finished in second, ending up 4.190 seconds behind the Meyer Shank Racing with Curb-Agajanian Acura entry. The team would end up missing out on the title owing to contact between Albuquerque and championship rival Pipo Derani in the final race at Road Atlanta, an event where Delétraz qualified the #10 Acura on pole position, thereby scoring his first ever pole in endurance racing.^[33][34]

For his European season, the Swiss driver would contest a campaign for Team WRT in the LMP2 category of the FIA World Endurance Championship, whilst also joining Racing Team Turkey in an attempt to defend his European Le Mans Series title for the second year in a row, this time entering the Pro-Am class alongside Charlie Eastwood and Salih Yoluç.^[35][36] During the ELMS season-opener at Barcelona, Delétraz managed to overcome a late pit stop for a change of his car's tail section to pass Neel Jani for the lead with 15 minutes to go, thus beginning RTT's season with an overall victory.^[37] Another class victory followed at Paul Ricard, though Delétraz would drop from the overall lead to third within the final few laps as a de-laminating tyre shredded parts of the car's bodywork.^[38][39] Bad luck hit the #34 crew at Aragón, where a prospective second place was scuppered during the final pit stop, as the car could not be fired up for eleven minutes, thus dropping them to ninth in class.^[40] Despite one further Pro-Am podium in Spa, the team missed out on the title, as a spin by Yoluç in the penultimate race acted as a defining setback.^[41] At the end of the year, the team finished third, both in the Pro-Am and overall standings.^[42]

The main success story of the season came in the WEC, where Delétraz was partnered by Robert Kubica and Rui Andrade. Following a fifth place at Sebring and a podium at Portimão, the trio combined to take the championship lead with a victory at Spa.^[43] Despite a strong race at the 24 Hours of Le Mans, the team were unable to beat the #34 of Inter Europol Competition; Delétraz losing out in the final stint to Fabio Scherer, who controlled the gap until the checkered flag.^[44][45] Another podium followed in Italy, where a late-race overtake by the Swiss driver on the #23 United Autosport guaranteed the team third.^[46] Thereafter, a controlled drive to victory in Fuji and a dominant display by WRT at Bahrain, one where the #41 took the lead late thanks to pit stop troubles for the #31 sister car, ended up guaranteeing Delétraz, Kubica, and Andrade the final ever LMP2 title in the WEC era.^[47][48][49]

At the end of the year, the Swiss auto racing federation awarded Delétraz the 2023 Auto Sport Schweiz Award for "special services to Swiss motorsport".^[50]

2024

Remaining with Wayne Taylor Racing, Delétraz embarked on a full-time campaign in the IMSA SportsCar Championship alongside Jordan Taylor, with Colton Herta joining them for the endurance rounds.^[51] At the season-opening 24 Hours of Daytona, the Swiss driver managed to resist the advances of Porsche's Mathieu Jaminet during a late restart to finish third, managing to recover for a podium despite a loss of power that lost the team one lap during the night.^[52][53] The following 12 Hours of Sebring saw Delétraz pull off a winning move on Sébastien Bourdais with five minutes to go, claiming WTR's first victory of the GTP era.^[54][55] At Long Beach, Delétraz crashed out of the race at the first corner, minutes after starting his stint.^[56]

Parallel to his commitments overseas, the Swiss driver partnered with long-time teammate Kubica and prototype rookie Jonny Edgar at AO Racing by TF in the ELMS.^[57]

Delétraz and AO by TF also took part in the 24 Hours of Le Mans, where the Swiss would go on to take pole position.^[58][59]

Karting career summary

Racing career summary

† As Delétraz was a guest driver, he was ineligible for championship points.
^* Season still in progress.

Complete Formula Renault 2.0 Northern European Cup results

(key) (Races in bold indicate pole position) (Races in italics indicate fastest lap)

Complete Eurocup Formula Renault 2.0 results

(key) (Races in bold indicate pole position; races in italics indicate fastest lap)

^† As Delétraz was a guest driver, he was ineligible for points.

Complete Formula V8 3.5 Series results

(key) (Races in bold indicate pole position; races in italics indicate fastest lap)

Complete 24 Hours of Zolder results

More information Year, Team ...

Year	Team	Co-Drivers	Car	Class	Laps	Pos.	Class Pos.
2015	Walkenhorst Motorsport	Trent Hindman Victor Bouveng Dirk Adorf	BMW M235i Racing Cup	T7	710	15th	7th

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Complete GP2 Series results

(key) (Races in bold indicate pole position) (Races in italics indicate fastest lap)

Complete FIA Formula 2 Championship results

(key) (Races in bold indicate pole position) (Races in italics indicate points for the fastest lap of top ten finishers)

Complete 24 Hours of Le Mans results

More information Year, Team ...

Year	Team	Co-Drivers	Car	Class	Laps	Pos.	Class Pos.
2020	Rebellion Racing	Nathanaël Berthon Romain Dumas	Rebellion R13-Gibson	LMP1	381	4th	4th
2021	Team WRT	Robert Kubica Yifei Ye	Oreca 07-Gibson	LMP2	362	NC	NC
2022	Prema Orlen Team	Lorenzo Colombo Robert Kubica	Oreca 07-Gibson	LMP2	369	6th	2nd
2023	Team WRT	Rui Andrade Robert Kubica	Oreca 07-Gibson	LMP2	328	10th	2nd
2024	AO by TF	P. J. Hyett Alex Quinn	Oreca 07-Gibson	LMP2	295	20th	6th
				LMP2 Pro-Am			2nd
Source:[60]

Close

Complete European Le Mans Series results

(key) (Races in bold indicate pole position; results in italics indicate fastest lap)

^* Season still in progress.

Complete FIA World Endurance Championship results

Complete IMSA SportsCar Championship results

(key) (Races in bold indicate pole position; races in italics indicate fastest lap)

^† Points only counted towards the Michelin Endurance Cup, and not the overall LMP2 Championship. ^* Season still in progress.

Complete Asian Le Mans Series results

(key) (Races in bold indicate pole position) (Races in italics indicate fastest lap)

^*Season still in progress.