| 1st | 7 | Castroneves / Taylor / Rossi | Acura ARX-05 | Acura Team Penske | 1:46.874 | 1:46.8740 | 1:47.7400 | | 1:48.4580 | 1:48.3580 |
| 2nd | 10 | van der Zande / Briscoe / Dixon | Cadillac DPi-V.R | Konica Minolta Cadillac DPi-V.R | 1:47.125 | 1:47.1250 | 1:48.8540 | 1:50.3070 | 1:47.4780 | 1:48.8400 |
| 3rd | 6 | Montoya / Cameron / Pagenaud | Acura ARX-05 | Acura Team Penske | 1:47.140 | 1:47.1400 | 1:48.1650 | 1:48.7340 | 1:48.8570 | 1:49.2800 |
| 4th | 5 | Bourdais / Vautier / Duval | Cadillac DPi-V.R | Mustang Sampling Racing/JDC-Miller MotorSports | 1:47.209 | 1:47.2090 | 1:48.1720 | 1:49.5090 | 1:47.6450 | 1:49.3790 |
| 5th | 55 | Bomarito / Tincknell / Hunter-Reay | Mazda RT24-P | Mazda Motorsports | 1:47.245 | 1:47.2450 | 1:48.5090 | 1:48.9800 | 1:49.0550 | 1:49.4490 |
| 6th | 31 | Nasr / Derani / Chaves | Cadillac DPi-V.R | Whelen Engineering Racing | 1:47.327 | 1:47.3270 | 1:47.7530 | | 1:48.2410 | 1:48.5350 |
| 7th | 77 | Jarvis / Nunez / Pla | Mazda RT24-P | Mazda Motorsports | 1:47.474 | 1:47.4740 | 1:48.1720 | 1:49.3560 | 1:48.3350 | 1:48.6170 |
| 8th | 85 | Leist / Simpson / Andrews | Cadillac DPi-V.R | JDC-Miller MotorSports | 1:47.696 | 1:47.6960 | 1:48.4570 | | 1:49.1780 | 1:49.6150 |
| 9th | 8 | Farano / Jensen / Heinemeier Hansson | Oreca 07 Gibson | Tower Motorsport by Starworks | 1:50.068 | 1:54.1940 | 1:50.0680 | 1:54.4050 | 1:51.6670 | 1:50.1270 |
| 10th | 51 | Smiechowski / Rao / Bell | Oreca 07 Gibson | Inter Europol Competition | 1:50.376 | 1:53.1470 | 1:50.3760 | 1:55.2300 | 1:52.9510 | 1:52.4120 |
| 11th | 52 | Kelly / Trummer / Huffaker | Oreca 07 Gibson | PR1 Mathiasen Motorsports | 1:50.619 | 1:51.3730 | 1:50.6190 | 1:54.8930 | 1:51.9310 | 1:52.0630 |
| 12th | 38 | Yount / Byrne / Cosmo | Oreca 07 Gibson | Performance Tech Motorsports | 1:52.758 | 1:54.0450 | 1:52.7580 | 1:54.3040 | 1:55.2170 | 1:56.0190 |
| 13th | 3 | Garcia / Taylor / Catsburg | Chevrolet Corvette C8.R | Corvette Racing | 1:55.456 | 1:55.4560 | 1:57.0380 | | 1:58.4440 | 1:58.5370 |
| 14th | 25 | Spengler / De Phillippi / Herta | BMW M8 GTE | BMW Team RLL | 1:56.116 | 1:56.1160 | 1:57.1190 | 1:57.1630 | 1:59.1120 | 1:58.4610 |
| 15th | 24 | Farfus / Krohn / Edwards | BMW M8 GTE | BMW Team RLL | 1:56.316 | 1:56.3160 | 1:57.3070 | 2:04.3740 | 1:58.6060 | 1:58.6770 |
| 16th | 4 | Gavin / Milner / Fässler | Chevrolet Corvette C8.R | Corvette Racing | 1:56.446 | 1:56.4460 | 1:57.3450 | | 1:59.5440 | 1:58.8190 |
| 17th | 911 | Tandy / Makowiecki / Bamber | Porsche 991 RSR 19 | Porsche GT Team | 1:56.840 | 1:56.8400 | 1:57.2600 | 1:58.4810 | 1:58.1720 | 1:58.1700 |
| 18th | 912 | Bamber / Vanthoor / Jani | Porsche 991 RSR 19 | Porsche GT Team | 1:57.677 | 1:57.7740 | 1:57.6770 | 1:58.5020 | 1:57.9750 | 1:58.2000 |
| 19th | 16 | Hardwick / Long / Heylen | Porsche 991 GT3 R | Wright Motorsports | 2:00.844 | 2:00.8440 | 2:02.5560 | 2:05.1760 | 2:02.4780 | 2:02.9630 |
| 20th | 30 | Ferriol / Davis / Kaffer | Audi R8 LMS GT3 | Team Hardpoint | 2:01.546 | 2:01.5460 | 2:02.6940 | 2:05.7750 | 2:03.4180 | 2:02.8340 |
| 21st | 14 | Hawksworth / Telitz / Kirkwood | Lexus RC F GT3 | AIM Vasser-Sullivan | 2:01.605 | 2:01.6050 | 2:03.4630 | | 2:02.5910 | 2:03.1910 |
| 22nd | 11 | Heistand / Schothorst / Perera | Lamborghini Huracán GT3 Evo | GRT Grasser Racing | 2:01.652 | 2:01.6520 | 2:02.0570 | 2:01.9680 | 2:02.3520 | 2:02.5100 |
| 23rd | 63 | MacNeil / Balzan / Westphal | Ferrari 488 GT3 | Scuderia Corsa | 2:01.802 | 2:01.8020 | 2:02.1630 | 2:03.9650 | 2:03.3740 | 2:02.9030 |
| 24th | 12 | Montecalvo / Bell / de Quesada | Lexus RC F GT3 | AIM Vasser-Sullivan | 2:01.839 | 2:01.8390 | 2:02.6810 | | 2:02.9570 | 2:03.3160 |
| 25th | 74 | Robinson / Aschenbach / Miller | Mercedes-AMG GT3 Evo | Riley Motorsports | 2:02.069 | 2:02.6890 | 2:02.0690 | | 2:03.3210 | 2:02.6400 |
| 26th | 96 | Foley / Machavern / Yelloly | BMW M6 GT3 | Turner Motorsport | 2:02.210 | 2:02.2100 | 2:03.3590 | 2:03.8940 | 2:03.2350 | 2:02.9450 |
| 27th | 86 | McMurry / Farnbacher / Michimi | Acura NSX GT3 | Meyer Shank Racing w/ Curb-Agajanian | 2:02.286 | 2:02.2860 | 2:02.7920 | | 2:03.0650 | 2:03.1360 |
| 28th | 48 | Sellers / Snow / Lewis | Lamborghini Huracán GT3 Evo | Paul Miller Racing | 2:02.435 | 2:02.4350 | 2:02.7920 | 2:04.2820 | 2:02.4500 | 2:03.7640 |
| 29th | 23 | James / de Angelis / Turner | Aston Martin Vantage GT3 | Heart of Racing Team | 2:02.625 | 2:02.7050 | 2:02.6250 | 2:04.3000 | 2:03.2840 | 2:02.7380 |
| 30th | 57 | Goikhberg / Hindman / Hand | Acura NSX GT3 | Heinricher Racing w/MSR Curb-Agajanian | 2:03.153 | 2:03.1530 | 2:03.5330 | 2:03.2820 | 2:03.8110 | 2:03.9930 |
| 31st | 44 | Lally / Potter / Pumpelly | Lamborghini Huracán GT3 Evo | GRT Magnus | 2:03.492 | 2:04.3630 | 2:03.6660 | 2:03.7110 | 2:03.6110 | 2:03.4920 |