| 1st | 6 | Cameron / Pagenaud / Montoya | Acura ARX-05 | Acura Team Penske | 1:45.865 | 1:45.8650 | 1:48.9690 | 3:11.2810 | 1:47.3510 | 1:46.6430 |
| 2nd | 7 | Castroneves / Rossi / Taylor | Acura ARX-05 | Acura Team Penske | 1:46.011 | 1:46.0110 | 1:48.6700 | no time | 1:47.9890 | 1:46.6760 |
| 3rd | 77 | Nunez / Bernhard / Jarvis | Mazda RT24-P | Mazda Team Joest | 1:46.011 | 1:46.0110 | 1:47.8930 | no time | 1:47.5590 | 1:46.9520 |
| 4th | 5 | Albuquerque / Hartley / Barbosa | Cadillac DPi-V.R | Mustang Sampling Racing | 1:46.238 | 1:46.2380 | 1:48.0290 | no time | 1:48.1990 | 1:46.7990 |
| 5th | 31 | Derani / Nasr / Curran | Cadillac DPi-V.R | Whelen Engineering Racing | 1:46.354 | 1:46.3540 | 1:47.7460 | no time | 1:46.9960 | 1:47.1740 |
| 6th | 10 | van der Zande / Taylor / Vaxiviere | Cadillac DPi-V.R | Konica Minolta Cadillac DPi-V.R. | 1:46.530 | 1:46.5300 | 1:48.2080 | | 1:47.3890 | 1:48.2580 |
| 7th | 55 | Bomarito / Tincknell / Pla | Mazda RT24-P | Mazda Team Joest | 1:46.832 | 1:46.8320 | 1:47.4720 | | 1:46.8340 | 1:47.0740 |
| 8th | 84 | Trummer / Simpson / Miller | Cadillac DPi-V.R | JDC-Miller MotorSports | 1:47.086 | 1:47.0860 | 1:49.1350 | | 1:48.3590 | 1:47.8230 |
| 9th | 85 | Piedrahita / Goikhberg / Vautier | Cadillac DPi-V.R | JDC-Miller MotorSports | 1:47.275 | 1:47.2750 | 1:48.6970 | | 1:48.0270 | 1:47.5650 |
| 10th | 50 | Owen / Binder / Canapino | Cadillac DPi-V.R | Juncos Racing | 1:47.478 | 1:47.4780 | 1:49.4300 | no time | 1:48.9370 | 1:48.6970 |
| 11th | 54 | Bennett / Braun / Dumas | Nissan Onroak DPi | CORE autosport | 1:47.806 | 1:50.0290 | 1:47.9550 | | 1:47.8060 | 1:48.1740 |
| 12th | 52 | McMurry / Aubry / Fjordbach | Oreca 07 Gibson | PR1 Mathiasen Motorsports | 1:49.728 | 1:49.7280 | 1:51.3030 | no time | 1:50.8770 | 1:50.2690 |
| 13th | 38 | Masson / Cassels / Evans | Oreca 07 Gibson | Performance Tech Motorsports | 1:49.739 | 1:49.7390 | 1:51.5060 | no time | 1:52.4680 | 1:52.8380 |
| 14th | 911 | Pilet / Tandy / Makowiecki | Porsche 991 RSR | Porsche GT Team | 1:55.899 | 1:55.8990 | 1:58.0120 | no time | 1:56.9910 | 1:56.6350 |
| 15th | 912 | Vanthoor / Jaminet / Bamber | Porsche 991 RSR | Porsche GT Team | 1:56.042 | 1:56.0420 | 1:57.9290 | 3:03.2580 | 1:56.9830 | 1:57.1690 |
| 16th | 3 | Garcia / Magnussen / Rockenfeller | Chevrolet Corvette C7.R | Corvette Racing | 1:56.158 | 1:56.1580 | 1:57.7750 | no time | 1:56.9540 | 1:57.1050 |
| 17th | 67 | Westbrook / Dixon / Briscoe | Ford GT | Ford Chip Ganassi Racing | 1:56.189 | 1:56.1890 | 1:57.5620 | no time | 1:57.0900 | 1:56.8630 |
| 18th | 4 | Milner / Gavin / Fässler | Chevrolet Corvette C7.R | Corvette Racing | 1:56.248 | 1:56.2480 | 1:57.9010 | no time | 1:57.9910 | 1:57.0710 |
| 19th | 24 | Krohn / Edwards / Eng | BMW M8 GTE | BMW Team RLL | 1:56.486 | 1:56.4860 | 1:57.9180 | no time | 1:57.5070 | 1:57.0060 |
| 20th | 25 | Blomqvist / Herta / De Phillippi | BMW M8 GTE | BMW Team RLL | 1:56.486 | 1:56.4860 | 1:58.2440 | no time | 1:58.1270 | 1:57.2800 |
| 21st | 66 | Bourdais / Hand / Müller | Ford GT | Ford Chip Ganassi Racing | 1:56.731 | 1:56.7310 | 1:57.4780 | no time | 1:57.2010 | 1:56.9570 |
| 22nd | 86 | Hindman / Farnbacher / Marks | Acura NSX GT3 | Meyer Shank Racing w/ Curb-Agajanian | 1:59.917 | 1:59.9170 | 2:01.5970 | no time | 2:00.7930 | 2:00.3190 |
| 23rd | 57 | Nielsen / Legge / Beatriz | Acura NSX GT3 | Heinricher Racing w/Meyer Shank Racing | 2:00.012 | 2:00.8090 | 2:01.5640 | no time | 2:01.7750 | 2:00.0120 |
| 24th | 11 | Ineichen / Bortolotti / Breukers | Lamborghini Huracán GT3 Evo | GRT Grasser Racing Team | 2:00.029 | 2:00.7100 | 2:01.2050 | no time | 2:00.9130 | 2:00.0290 |
| 25th | 96 | Foley / Auberlen / Machavern | BMW M6 GT3 | Turner Motorsport | 2:00.299 | 2:00.2990 | 2:01.9720 | | 2:00.5830 | 2:00.3610 |
| 26th | 48 | Hardwick / Sellers / Lewis | Lamborghini Huracán GT3 Evo | Paul Miller Racing | 2:00.325 | 2:01.7250 | 2:01.2060 | no time | 2:01.6510 | 2:00.3250 |
| 27th | 9 | Robichon / Hargrove / Kern | Porsche 991 GT3 R | Pfaff Motorsports | 2:00.349 | 2:00.5040 | 2:01.5310 | no time | 2:01.2920 | 2:00.3490 |
| 28th | 44 | Potter / Pumpelly / Lally | Lamborghini Huracán GT3 Evo | Magnus Racing | 2:00.376 | 2:02.2050 | 2:01.1710 | no time | 2:00.9470 | 2:00.3760 |
| 29th | 71 | Perez / Buhk / Schiller | Mercedes-AMG GT3 | P1 Motorsports | 2:00.714 | 2:01.9610 | 2:02.2320 | no time | 2:01.6170 | 2:00.7140 |
| 30th | 12 | Montecalvo / Bell / Telitz | Lexus RC F GT3 | AIM Vasser Sullivan | 2:00.753 | 2:01.1000 | 2:01.7600 | no time | 2:01.4480 | 2:00.7530 |
| 31st | 47 | Gdovic / Aschenbach / Yount | Lamborghini Huracán GT3 Evo | Precision Performance Motorsports (PPM) | 2:00.775 | 2:00.7750 | 2:01.9520 | no time | 2:02.8990 | 2:01.3780 |
| 32nd | 63 | MacNeil / Vilander / Westphal | Ferrari 488 GT3 | Scuderia Corsa | 2:00.974 | 2:00.9740 | 2:01.2200 | | 2:01.5060 | 2:01.2170 |
| 33rd | 14 | Heistand / Hawksworth / Frommenwiler | Lexus RC F GT3 | AIM Vasser Sullivan | 2:01.132 | | 2:01.6910 | 3:19.9070 | 2:01.4340 | 2:01.1320 |
| 34th | 33 | Keating / Bleekemolen / Fraga | Mercedes-AMG GT3 | Riley Motorsports - Team AMG | 2:01.177 | 2:01.1840 | 2:02.0500 | 2:48.1900 | 2:01.5830 | 2:01.1770 |
| 35th | 29 | Morad / Mies / Feller | Audi R8 LMS GT3 | Montaplast by Land Motorsport | 2:01.189 | 2:01.1890 | 2:02.0690 | no time | 2:01.8510 | 2:01.5890 |
| 36th | 8 | Pérez Companc / Chase / Dalziel | Audi R8 LMS GT3 | Starworks Motorsport | 2:01.240 | 2:01.3330 | 2:02.5320 | no time | 2:02.1220 | 2:01.2400 |
| 37th | 73 | Boulle / Long / Lindsey | Porsche 991 GT3 R | Park Place Motorsports | 2:01.240 | 2:02.1500 | 2:01.9590 | no time | 2:01.2400 | 2:01.5500 |
| 38th | 19 | Hardeman / Riberas / Davis | Audi R8 LMS GT3 | Moorespeed | 2:01.550 | 2:02.5340 | 2:02.4080 | no time | 2:01.5500 | 2:02.5740 |