| 1st | 6 | Montoya / Cameron / Pagenaud | Acura ARX-05 | Acura Team Penske | 1:08.412 | 1:08.4120 | 1:09.7220 | 1:11.9290 | 1:09.8880 | 1:10.2620 |
| 2nd | 7 | Castroneves / Taylor / Rossi | Acura ARX-05 | Acura Team Penske | 1:08.506 | 1:08.5060 | 1:09.8190 | 1:37.2170 | 1:10.0420 | 1:10.2850 |
| 3rd | 31 | Nasr / Derani / Albuquerque | Cadillac DPi-V.R | Whelen Engineering Racing | 1:08.612 | 1:08.6120 | 1:09.8080 | 1:11.8790 | 1:09.2300 | 1:10.1750 |
| 4th | 55 | Bomarito / Tincknell / Hunter-Reay | Mazda RT24-P | Mazda Motorsports | 1:08.636 | 1:08.6360 | 1:09.8830 | 1:10.8350 | 1:10.0760 | 1:10.3040 |
| 5th | 10 | van der Zande / Briscoe / Dixon | Cadillac DPi-V.R | Konica Minolta Cadillac DPi-V.R | 1:08.850 | 1:08.8500 | 1:09.7230 | 1:11.6980 | 1:09.8600 | 1:10.2150 |
| 6th | 77 | Jarvis / Nunez / Pla | Mazda RT24-P | Mazda Motorsports | 1:08.925 | 1:08.9250 | 1:09.7500 | 1:10.1460 | 1:09.7570 | 1:10.8010 |
| 7th | 5 | Bourdais / Vautier / Duval | Cadillac DPi-V.R | Mustang Sampling Racing / JDC-Miller MotorSports | 1:09.040 | 1:09.0400 | 1:10.2460 | 1:11.0500 | 1:10.1530 | 1:10.8190 |
| 8th | 85 | Miller / Leist / Aubry | Cadillac DPi-V.R | JDC-Miller MotorSports | 1:09.229 | 1:09.2290 | 1:10.8270 | 1:12.3450 | 1:10.2780 | 1:12.3070 |
| 9th | 38 | McGuire / Bell / Braun | Oreca 07 Gibson | Performance Tech Motorsports | 1:10.634 | no time | 1:10.6340 | 1:17.0780 | 1:11.4020 | 1:11.5030 |
| 10th | 8 | Farano / Jensen / van Uitert | Oreca 07 Gibson | Tower Motorsport by Starworks | 1:10.665 | 1:14.0820 | 1:10.6650 | 1:10.9590 | 1:11.0780 | 1:11.1950 |
| 11th | 52 | Kelly / Trummer / Huffaker | Oreca 07 Gibson | PR1 Mathiasen Motorsports | 1:10.761 | 1:11.5900 | 1:10.7610 | | 1:11.2310 | 1:12.1460 |
| 12th | 51 | McCusker / Smiechowski / Hodes | Oreca 07 Gibson | Inter Europol Competition | 1:12.038 | 1:13.1610 | 1:12.0380 | 1:16.0740 | 1:14.1820 | 1:13.6700 |
| 13th | 3 | Garcia / Taylor / Catsburg | Chevrolet Corvette C8.R | Corvette Racing | 1:15.163 | 1:15.1630 | 1:16.9280 | 1:25.1320 | 1:16.9010 | 1:17.5120 |
| 14th | 25 | Spengler / De Phillippi / Herta | BMW M8 GTE | BMW Team RLL | 1:15.434 | 1:15.4340 | 1:17.4820 | 1:18.1260 | 1:17.2810 | 1:17.8740 |
| 15th | 24 | Farfus / Krohn / Edwards | BMW M8 GTE | BMW Team RLL | 1:15.615 | 1:15.6150 | 1:16.9280 | 1:17.7730 | 1:17.2240 | 1:17.5800 |
| 16th | 912 | Bamber / Vanthoor / Jaminet | Porsche 991 RSR 19 | Porsche GT Team | 1:15.657 | 1:15.6570 | 1:16.6690 | | 1:17.0080 | 1:17.2520 |
| 17th | 4 | Gavin / Milner / Fässler | Chevrolet Corvette C8.R | Corvette Racing | 1:15.856 | 1:15.8560 | 1:16.9270 | 1:25.9950 | 1:17.3920 | 1:17.7410 |
| 18th | 911 | Tandy / Makowiecki / Campbell | Porsche 991 RSR 19 | Porsche GT Team | 1:15.858 | 1:15.8580 | 1:16.7800 | 1:17.4220 | 1:17.4940 | 1:17.4810 |
| 19th | 86 | McMurry / Farnbacher / Michimi | Acura NSX GT3 | Meyer Shank Racing w/ Curb-Agajanian | 1:19.291 | 1:19.2910 | 1:20.3190 | 1:19.7930 | 1:20.2200 | 1:20.9800 |
| 20th | 63 | MacNeil / Balzan / Westphal | Ferrari 488 GT3 | Scuderia Corsa | 1:19.464 | 1:19.4640 | 1:20.2980 | 1:23.4640 | 1:20.2580 | 1:20.7530 |
| 21st | 12 | Montecalvo / Bell / Kirkwood | Lexus RC F GT3 | AIM Vasser-Sullivan | 1:19.563 | 1:19.5630 | 1:20.6000 | 1:20.5040 | 1:20.6360 | 1:21.0490 |
| 22nd | 48 | Sellers / Snow / Lewis | Lamborghini Huracán GT3 Evo | Paul Miller Racing | 1:19.567 | 1:19.5670 | 1:20.6130 | 1:21.6580 | 1:19.9460 | 1:21.0450 |
| 23rd | 96 | Auberlen / Foley / Machavern | BMW M6 GT3 | Turner Motorsport | 1:19.657 | 1:19.6570 | 1:20.7980 | 1:20.5680 | 1:20.0570 | 1:21.0010 |
| 24th | 57 | Parente / Goikhberg / Hindman | Acura NSX GT3 | Heinricher Racing w/MSR Curb-Agajanian | 1:19.666 | 1:19.6660 | 1:20.4980 | 1:20.4400 | 1:20.5520 | 1:21.2120 |
| 25th | 30 | Ferriol / Winkelhock / Davis | Audi R8 LMS GT3 | Team Hardpoint | 1:19.722 | 1:19.7220 | 1:20.4130 | 1:20.6670 | 1:21.1080 | 1:20.6600 |
| 26th | 9 | Olsen / Robichon / Kern | Porsche 991 GT3 R | Pfaff Motorsports | 1:19.774 | 1:19.7740 | 1:20.1930 | 1:22.4790 | 1:21.0900 | 1:20.9370 |
| 27th | 14 | Hawksworth / Telitz / de Quesada | Lexus RC F GT3 | AIM Vasser-Sullivan | 1:19.908 | 1:19.9080 | 1:20.3380 | 1:22.8890 | 1:20.4610 | 1:20.5010 |
| 28th | 16 | Hardwick / Long / Heylen | Porsche 991 GT3 R | Wright Motorsports | 1:19.969 | 1:20.3990 | 1:19.9690 | 1:22.3690 | 1:20.4840 | 1:20.5470 |
| 29th | 44 | Lally / Potter / Pumpelly | Lamborghini Huracán GT3 Evo | GRT Magnus | 1:20.119 | 1:20.4530 | 1:20.5320 | 1:24.0190 | 1:20.1190 | 1:21.6330 |
| 30th | 23 | James / de Angelis / Turner | Aston Martin Vantage GT3 | Heart of Racing Team | 1:20.415 | 1:20.4340 | 1:20.6660 | 1:20.9710 | 1:20.4150 | 1:20.8610 |
| 31st | 74 | Robinson / Aschenbach / Keating | Mercedes-AMG GT3 Evo | Riley Motorsports | 1:20.622 | 1:20.6220 | 1:20.6740 | | 1:20.8110 | 1:21.2670 |