| 2000 · 2000 24 Hours of Le Mans | 15 | 11 | LMP900 | Panoz Motorsports | David Brabham · Jan MAGNUSSEN · Mario AndrettiDavid Brabham Jan Magnussen Mario Andretti | Panoz LMP-1 Roadster-S | Élan 6L8 6.0 L V8 | 315 | Wikipedia contributors · CC BY-SA 4.0 |
| 1997 · 1997 24 Hours of Le Mans | DNF | 9 | LM-P875 | Courage Compétition | Mario Andretti · Michael Andretti · Olivier GrouillardMario Andretti Michael Andretti Olivier Grouillard | Courage C36 | Porsche 935/76 3.0L F6 twin turbo | 197 | Wikipedia contributors · CC BY-SA 4.0 |
| 1996 · 1996 24 Hours of Le Mans | 13 | 4 | LM P1/C90 | Courage Compétition | Mario Andretti · Jan LAMMERS · Derek WarwickMario Andretti Jan Lammers Derek Warwick | Courage C36 | Porsche 935/76 3.0L F6 twin turbo | 315 | Wikipedia contributors · CC BY-SA 4.0 |
| 1995 · 1995 24 Hours of Le Mans | 2 | 13 | LM-WSC | Courage Compétition | Bob Wollek · Mario Andretti · Éric HélaryBob Wollek Mario Andretti Éric Hélary | Courage C34 | Porsche 935/82 3.0L F6 twin turbo | 297 | Wikipedia contributors · CC BY-SA 4.0 |
| 1988 · 1988 24 Hours of Le Mans | 6 | 19 | Gr.C1 | Porsche AG | Mario Andretti · Michael Andretti · John AndrettiMario Andretti Michael Andretti John Andretti | Porsche 962C | Porsche 935/82 3.0L F6 twin turbo | 375 | Wikipedia contributors · CC BY-SA 4.0 |
| 1983 · 1983 24 Hours of Le Mans | 3 | 21 | Gr.C | Porsche Kremer Racing | Mario Andretti · Michael Andretti · Philippe AlliotMario Andretti Michael Andretti Philippe Alliot | Porsche 956 | Porsche 935/79 2.6L F6 twin turbo | 365 | Wikipedia contributors · CC BY-SA 4.0 |
| 1982 · 1982 24 Hours of Le Mans | DNS DSQ | 27 | Gr.C | Grand Touring Cars Inc. | Mario Andretti · Michael AndrettiMario Andretti Michael Andretti | Mirage M12 | Cosworth DFL 4.0L V8 | | Wikipedia contributors · CC BY-SA 4.0 |
| 1975 · 6 Hours of Watkins Glen World Championship of Makes and SCCA Trans-Am Championship | 2 | 3 | 2. S3.0 | US Willi Kauhsen Racing Team | Arturo Merzario · Mario Andretti | Alfa Romeo 33TT12 ASK | — | 1 | WSPR historical record |
| 1975 · 6 Hours of Watkins Glen World Championship of Makes and SCCA Trans-Am Championship | source_section_running_in_practice | 6T | S3.0 | Willi Kauhsen Racing Team | Derek Bell · Arturo Merzario · Mario Andretti · Henri Pescarolo | Alfa Romeo 33TT12 | — | | WSPR historical record |
| 1974 · 1000 km Monza | 1 | 3 | 1. S3.0 | US Autodelta SpA | Arturo Merzario · Mario Andretti | Alfa Romeo 33TT12 ASK | — | 1 | WSPR historical record |
| 1974 · 6 Hours of Watkins Glen World Championship of Makes and SCCA Trans-Am Championship | did_not_start | 70 | S3.0 | Autodelta SpA | Rolf Stommelen · Mario Andretti | Alfa Romeo 33TT12 | — | | WSPR historical record |
| 1974 · 6 Hours of Watkins Glen World Championship of Makes and SCCA Trans-Am Championship | disqualified | 60 | S3.0 | Autodelta SpA | Arturo Merzario · Mario Andretti | Alfa Romeo 33TT12 | — | 171 | WSPR historical record |
| 1972 · Buenos Aires 1000 Kilometres | 10 | 28 | 8. S3.0 | SpA Ferrari SEFAC | Jacky Ickx · Mario Andretti | Ferrari 312PB | — | 152 | WSPR historical record |
| 1972 · Watkins Glen 6 Hours | 1 | 85 | 1. S3.0 | SpA Ferrari SEFAC | Mario Andretti · Jacky Ickx | Ferrari 312PB | — | 195 | WSPR historical record |
| 1972 · Daytona 6 Hours | 1 | 2 | 1. S3.0 | SpA Ferrari SEFAC | Mario Andretti · Jacky Ickx | Ferrari 312PB | — | 194 | WSPR historical record |
| 1972 · Sebring 12 Hours | 1 | 2 | 1. S3.0 | SpA Ferrari SEFAC | Mario Andretti · Jacky Ickx | Ferrari 312PB | — | 259 | WSPR historical record |
| 1972 · BOAC 1000 Kilometres, Brands Hatch | 1 | 11 | 1. S3.0 | SpA Ferrari SEFAC | Jacky Ickx · Mario Andretti | Ferrari 312PB | — | 235 | WSPR historical record |
| 1971 · Watkins Glen 6 Hours | retired | 40 | P | S.p.A. Ferrari SEFAC | Jacky Ickx · Mario Andretti | Ferrari 312PB | — | 55 | WSPR historical record |
| 1971 · Sebring 12 Hours | 36 | 25 | P3.0 | SpA Ferrari SEFAC | Mario Andretti · Jacky Ickx | Ferrari 312PB | — | 117 | WSPR historical record |
| 1970 · 24 h Daytona Beach | 3 | 28 | 3. S | SpA Ferrari SEFAC | Mario Andretti · Arturo Merzario · Jacky Ickx | Ferrari 512S | — | 676 | WSPR historical record |
| 1970 · Sebring 12 Hours | 1 | 21 | 1. S5.0 | SpA Ferrari SEFAC | Ignazio Giunti · Nino Vaccarella · Mario Andretti | Ferrari 512S | — | 248 | WSPR historical record |
| 1970 · Sebring 12 Hours | 35 | 19 | S5.0 | SpA Ferrari SEFAC | Mario Andretti · Arturo Merzario | Ferrari 512S Spyder | — | 227 | WSPR historical record |
| 1970 · Watkins Glen 6 Hours | 3 | 92 | 3. S5.0 | SpA Ferrari SEFAC | Mario Andretti · Ignazio Giunti | Ferrari 512S Spyder | — | 305 | WSPR historical record |
| 1969 · 12 h Sebring | 2 | 25 | 1. P3.0 | Ferrari SpA SEFAC | Chris Amon · Mario Andretti | Ferrari 312P | — | 238 | WSPR historical record |
| 1969 · 1000 km Monza | retired | 1 | P3.0 | SpA Ferrari SEFAC | Mario Andretti · Chris Amon | Ferrari 312P | — | 39 | WSPR historical record |
| 1969 · 1000 km Spa | entry_only | 9 | P3.0 | SpA Ferrari SEFAC | Mario Andretti · Peter Schetty | Ferrari 312P | — | | WSPR historical record |
| 1968 · 24 h Daytona | 6 | 23 | 5. P | Autodelta SpA | Mario Andretti · Lucien Bianchi | Alfa Romeo T33/2 | — | 609 | WSPR historical record |
| 1968 · 1000 km Monza | entry_only | 25 | P2.0 | Autodelta | Mario Andretti · Lucien Bianchi | Alfa Romeo 33/2 | — | | WSPR historical record |
| 1967 · 1967 24 Hours of Le Mans | DNF | 3 | P +5.0 | Ford Motor Company Holman & Moody | Mario Andretti · Lucien BianchiMario Andretti Lucien Bianchi | Ford GT40 Mk.IV | Ford 7.0L V8 | 188 | Wikipedia contributors · CC BY-SA 4.0 |
| 1967 · 24 h Daytona | retired | 5 | P+2.0 | Holman & Moody | Mario Andretti · Richie Ginther | Ford Mk II | — | 298 | WSPR historical record |
| 1967 · 12 h Sebring | 1 | 1 | 1. P+2.0 | Ford Motor Co. | Bruce McLaren · Mario Andretti | Ford Mk IV | — | 238 | WSPR historical record |
| 1966 · 1966 24 Hours of Le Mans | DNF | 6 | P +5.0 | Ford Motor Company Holman & Moody | Mario Andretti · Lucien BianchiMario Andretti Lucien Bianchi | Ford GT40 Mk.II | Ford 7.0L V8 | 97 | Wikipedia contributors · CC BY-SA 4.0 |
| 1966 · 24 h Daytona | 4 | 21 | 4. P+2.0 | North American Racing Team | Pedro Rodriguez · Mario Andretti | Ferrari 365P2 | — | 664 | WSPR historical record |
| 1966 · 12 h Sebring | 31 | 26 | P5.0 | North American Racing Team | Pedro Rodriguez · Mario Andretti | Ferrari 365P2 | — | 188 | WSPR historical record |
| 1965 · Double 500, Bridgehampton | retired | 18 | P+1.6 | North American Racing Team | Mario Andretti | Ferrari 275P | — | | WSPR historical record |