| 1st | 31 | Nasr / Conway / Curran / Middleton | Cadillac DPi-V.R | Whelen Engineering Racing | 1:35.806 | 1:35.8060 |
| 2nd | 90 | Cheever / McMurry / Vautier | Cadillac DPi-V.R | Spirit of Daytona Racing | 1:36.037 | 1:36.0370 |
| 3rd | 5 | Albuquerque / Fittipaldi / Barbosa | Cadillac DPi-V.R | Mustang Sampling Racing | 1:36.135 | 1:36.1350 |
| 4th | 10 | van der Zande / Taylor / Hunter-Reay | Cadillac DPi-V.R | Konica Minolta Cadillac DPi-V.R | 1:36.481 | 1:36.4810 |
| 5th | 6 | Montoya / Cameron / Pagenaud | Acura ARX-05 | Acura Team Penske | 1:36.988 | 1:36.9880 |
| 6th | 7 | Taylor / Castroneves / Rahal | Acura ARX-05 | Acura Team Penske | 1:37.231 | 1:37.2310 |
| 7th | 22 | Derani / Lapierre / Van Overbeek | Nissan Onroak DPi | Tequila Patron ESM | 1:37.245 | 1:37.2450 |
| 8th | 55 | Tincknell / Bomarito / Pigot | Mazda RT24-P | Mazda Team Joest | 1:37.263 | 1:37.2630 |
| 9th | 78 | Brundle / Felix da Costa / Habsburg / Tung | Oreca 07 Gibson | Jackie Chan DCR Jota | 1:37.274 | 1:37.2740 |
| 10th | 54 | Braun / Dumas / Duval / Bennett | Oreca 07 Gibson | CORE autosport | 1:37.303 | 1:37.3030 |
| 11th | 85 | Trummer / Cindric / DeFrancesco / Alon | Oreca 07 Gibson | JDC-Miller Motorsports | 1:37.323 | 1:37.3230 |
| 12th | 99 | Simpson / Menezes / Miller / Goikhberg | Oreca 07 Gibson | JDC-Miller Motorsports | 1:37.331 | 1:37.3310 |
| 13th | 38 | O'Ward / Masson / French | Oreca 07 Gibson | Performance Tech Motorsports | 1:37.496 | 1:37.4960 |
| 14th | 23 | Alonso / Norris / Hanson | Ligier JS P217 Gibson | United Autosports | 1:37.515 | 1:37.5150 |
| 15th | 2 | Pla / Dalziel / Sharp | Nissan Onroak DPi | Tequila Patron ESM | 1:37.525 | 1:37.5250 |
| 16th | 37 | Stroll / Juncadella / Frijns / Rosenqvist | Oreca 07 Gibson | Jackie Chan DCR Jota | 1:37.604 | 1:37.6040 |
| 17th | 32 | Senna / de Sadeleer / di Resta / Owen | Ligier JS P217 Gibson | United Autosports | 1:37.779 | 1:37.7790 |
| 18th | 77 | Jarvis / Rast / Nunez | Mazda RT24-P | Mazda Team Joest | 1:37.888 | 1:37.8880 |
| 19th | 52 | Saavedra / Yacaman / Gonzalez / Boulle | Ligier JS P217 Gibson | AFS/PR1 Mathiasen Motorsports | 1:37.905 | 1:37.9050 |
| 20th | 20 | Miller / Cullen / Drumwright | Riley Mk.30 Gibson | BAR1 Motorsports | 1:39.920 | 1:39.9200 |
| 21st | 66 | Hand / Bourdais / Müller | Ford GT | Ford Chip Ganassi Racing | 1:43.610 | 1:43.6100 |
| 22nd | 4 | Gavin / Fässler / Milner | Chevrolet Corvette C7.R | Corvette Racing | 1:43.640 | 1:43.6400 |
| 23rd | 67 | Briscoe / Westbrook / Dixon | Ford GT | Ford Chip Ganassi Racing | 1:43.714 | 1:43.7140 |
| 24th | 912 | Bamber / Vanthoor / Bruni | Porsche 991 RSR | Porsche GT Team | 1:43.888 | 1:43.8880 |
| 25th | 3 | Garcia / Magnussen / Rockenfeller | Chevrolet Corvette C7.R | Corvette Racing | 1:43.998 | 1:43.9980 |
| 26th | 62 | Alessandro Pier Guidi | Ferrari 488 GTE | Risi Competizione | 1:44.037 | 1:44.0370 |
| 27th | 911 | Tandy / Makowiecki / Pilet | Porsche 991 RSR | Porsche GT Team | 1:44.141 | 1:44.1410 |
| 28th | 25 | Sims / Eng / Auberlen / De Phillippi / Herta | BMW M8 GTLM | BMW Team RLL | 1:45.056 | 1:45.0560 |
| 29th | 24 | Farfus / Catsburg / Krohn / Edwards / Herta | BMW M8 GTLM | BMW Team RLL | 1:45.551 | 1:45.5510 |
| 30th | 11 | Ineichen / Perera / Bortolotti / Breukers | Lamborghini Huracán GT3 | GRT Grasser Racing Team | 1:47.104 | 1:47.1040 |
| 31st | 59 | Cairoli / Müller / Walls / Proczyk / Smith | Porsche 991 GT3 R | Manthey-Racing | 1:47.125 | 1:47.1250 |
| 32nd | 19 | van Splunteren / Pérez Companc / Engelhart / Machiels / Lenz | Lamborghini Huracán GT3 | GRT Grasser Racing Team | 1:47.364 | 1:47.3640 |
| 33rd | 29 | van der Linde / Schmidt / van der Linde / Mies | Audi R8 LMS GT3 | Montaplast by Land-Motorsport | 1:47.388 | 1:47.3880 |
| 34th | 93 | Aschenbach / Farnbacher / Ledogar / Marks | Acura NSX GT3 | Michael Shank Racing | 1:47.425 | 1:47.4250 |
| 35th | 44 | Lally / Winkelhock / Potter / Davis | Audi R8 LMS GT3 | Magnus Racing | 1:47.436 | 1:47.4360 |
| 36th | 58 | Long / Renauer / Jaminet / Nielsen | Porsche 991 GT3 R | Wright Motorsports | 1:47.481 | 1:47.4810 |
| 37th | 14 | Marcelli / Baumann / Junqueira | Lexus RCF GT3 | 3GT Racing | 1:47.496 | 1:47.4960 |
| 38th | 73 | Lindsey / Bergmeister / Pappas | Porsche 991 GT3 R | Park Place Motorsports | 1:47.537 | 1:47.5370 |
| 39th | 48 | Sellers / Caldarelli / Snow / Miller | Lamborghini Huracán GT3 | Paul Miller Racing | 1:47.570 | 1:47.5700 |
| 40th | 15 | Hawksworth / Farnbacher / Pruett / Heinemeier Hansson | Lexus RCF GT3 | 3GT Racing | 1:47.590 | 1:47.5900 |
| 41st | 86 | Parente / Allmendinger / Hindman / Legge | Acura NSX GT3 | Michael Shank Racing | 1:47.605 | 1:47.6050 |
| 42nd | 33 | Bleekemolen / Christodoulou / Keating / Stolz | Mercedes-AMG GT3 | Mercedes-AMG Team Riley Motorsports | 1:47.652 | 1:47.6520 |
| 43rd | 69 | Eversley / Rayhall / Falb / Gilsinger | Acura NSX GT3 | HART | 1:47.665 | 1:47.6650 |
| 44th | 63 | Balzan / Segal / Jeannette / MacNeil | Ferrari 488 GT3 | Scuderia Corsa | 1:47.726 | 1:47.7260 |
| 45th | 51 | Serra / Lamy / Lauda / Dalla Lana | Ferrari 488 GT3 | Spirit of Race | 1:47.752 | 1:47.7520 |
| 46th | 96 | Klingmann / Kvamme / Yount | BMW M6 GT3 | Turner Motorsport | 1:47.770 | 1:47.7700 |
| 47th | 82 | Molina / Fuentes / Pérez de Lara / Creel | Ferrari 488 GT3 | Risi Competizione | 1:47.814 | 1:47.8140 |
| 48th | 75 | Engel / Jäger / Grenier / Habul | Mercedes-AMG GT3 | SunEnergy1 Racing | 1:47.912 | 1:47.9120 |
| 49th | 64 | Bell / Montecalvo / Sweedler / Bird | Ferrari 488 GT3 | Scuderia Corsa | 1:48.042 | 1:48.0420 |
| 50th | 71 | Spinelli / Koch / Foley / Perez | Mercedes-AMG GT3 | P1 Motorsports | 1:48.094 | 1:48.0940 |