| 1st | 31 | Felipe Nasr / Mike Conway / Eric Curran / Stuart Middleton | Cadillac DPi-V.R | Whelen Engineering Racing | 1:35.8060 | 215.2723 |
| 2nd | 90 | Edward Cheever / Matthew McMurry / Tristan Vautier | Cadillac DPi-V.R | Spirit of Daytona Racing | 1:36.0370 | 214.7541 |
| 3rd | 5 | Filipe Albuquerque / Christian Fittipaldi / João Barbosa | Cadillac DPi-V.R | Mustang Sampling Racing | 1:36.1350 | 214.5352 |
| 4th | 10 | Renger van der Zande / Jordan Taylor / Ryan Hunter-Reay | Cadillac DPi-V.R | Konica Minolta Cadillac DPi-V.R | 1:36.4810 | 213.7659 |
| 5th | 6 | Juan Pablo Montoya / Dane Cameron / Simon Pagenaud | Acura ARX-05 | Acura Team Penske | 1:36.9880 | 212.6474 |
| 6th | 7 | Ricky Taylor / Helio Castroneves / Graham Rahal | Acura ARX-05 | Acura Team Penske | 1:37.2310 | 212.1164 |
| 7th | 22 | Pipo Derani / Nicolas Lapierre / Johannes Van Overbeek | Nissan Onroak DPi | Tequila Patron ESM | 1:37.2450 | 212.0858 |
| 8th | 55 | Harry Tincknell / Jonathan Bomarito / Spencer Pigot | Mazda RT24-P | Mazda Team Joest | 1:37.2630 | 212.0472 |
| 9th | 78 | Alex Brundle / Antonio Felix da Costa / Ferdinand Habsburg / Ho-Pin Tung | Oreca 07 Gibson | Jackie Chan DCR Jota | 1:37.2740 | 212.0230 |
| 10th | 54 | Colin Braun / Romain Dumas / Loic Duval / Jon Bennett | Oreca 07 Gibson | CORE autosport | 1:37.3030 | 211.9603 |
| 11th | 85 | Simon Trummer / Austin Cindric / Devlin DeFrancesco / Robert Alon | Oreca 07 Gibson | JDC-Miller Motorsports | 1:37.3230 | 211.9168 |
| 12th | 99 | Stephen Simpson / Gustavo Menezes / Chris Miller / Misha Goikhberg | Oreca 07 Gibson | JDC-Miller Motorsports | 1:37.3310 | 211.8991 |
| 13th | 38 | Patricio O'Ward / Kyle Masson / James French | Oreca 07 Gibson | Performance Tech Motorsports | 1:37.4960 | 211.5402 |
| 14th | 23 | Fernando Alonso / Lando Norris / Phil Hanson | Ligier JS P217 Gibson | United Autosports | 1:37.5150 | 211.4984 |
| 15th | 2 | Olivier Pla / Ryan Dalziel / Scott Sharp | Nissan Onroak DPi | Tequila Patron ESM | 1:37.5250 | 211.4775 |
| 16th | 37 | Lawrence Stroll / Daniel Juncadella / Robin Frijns / Felix Rosenqvist | Oreca 07 Gibson | Jackie Chan DCR Jota | 1:37.6040 | 211.3053 |
| 17th | 32 | Bruno Senna / Hugo de Sadeleer / Paul di Resta / William Owen | Ligier JS P217 Gibson | United Autosports | 1:37.7790 | 210.9270 |
| 18th | 77 | Oliver Jarvis / René Rast / Tristan Nunez | Mazda RT24-P | Mazda Team Joest | 1:37.8880 | 210.6937 |
| 19th | 52 | Sebastian Saavedra / Gustavo Yacaman / Roberto Gonzalez / Nicholas Boulle | Ligier JS P217 Gibson | AFS/PR1 Mathiasen Motorsports | 1:37.9050 | 210.6567 |
| 20th | 20 | Joel Miller / Ryan Cullen / Marc Drumwright | Riley Mk.30 Gibson | BAR1 Motorsports | 1:39.9200 | 206.4080 |
| 21st | 66 | Joey Hand / Sébastien Bourdais / Dirk Müller | Ford GT | Ford Chip Ganassi Racing | 1:43.6100 | 199.0565 |
| 22nd | 4 | Oliver Gavin / Marcel Fässler / Tommy Milner | Chevrolet Corvette C7.R | Corvette Racing | 1:43.6400 | 199.0002 |
| 23rd | 67 | Ryan Briscoe / Richard Westbrook / Scott Dixon | Ford GT | Ford Chip Ganassi Racing | 1:43.7140 | 198.8570 |
| 24th | 912 | Earl Bamber / Laurens Vanthoor / Gianmaria Bruni | Porsche 991 RSR | Porsche GT Team | 1:43.8880 | 198.5238 |
| 25th | 3 | Antonio Garcia / Jan Magnussen / Mike Rockenfeller | Chevrolet Corvette C7.R | Corvette Racing | 1:43.9980 | 198.3146 |
| 26th | 62 | Alessandro Pier Guidi | Ferrari 488 GTE | Risi Competizione | 1:44.0370 | 198.2406 |
| 27th | 911 | Nick Tandy / Frédéric Makowiecki / Patrick Pilet | Porsche 991 RSR | Porsche GT Team | 1:44.1410 | 198.0426 |
| 28th | 25 | Alexander Sims / Philipp Eng / Bill Auberlen / Connor De Phillippi / Colton Herta | BMW M8 GTLM | BMW Team RLL | 1:45.0560 | 196.3174 |
| 29th | 24 | Augusto Farfus / Nicky Catsburg / Jesse Krohn / John Edwards / Colton Herta | BMW M8 GTLM | BMW Team RLL | 1:45.5510 | 195.3969 |
| 30th | 11 | Rolf Ineichen / Franck Perera / Mirko Bortolotti / Rik Breukers | Lamborghini Huracán GT3 | GRT Grasser Racing Team | 1:47.1040 | 192.5628 |
| 31st | 59 | Matteo Cairoli / Sven Müller / Randy Walls / Hari Proczyk / Steve Smith | Porsche 991 GT3 R | Manthey-Racing | 1:47.1250 | 192.5258 |
| 32nd | 19 | Max van Splunteren / Ezequiel Pérez Companc / Christian Engelhart / Louis Machiels / Christoph Lenz | Lamborghini Huracán GT3 | GRT Grasser Racing Team | 1:47.3640 | 192.0977 |
| 33rd | 29 | Kelvin van der Linde / Jeffrey Schmidt / Sheldon van der Linde / Christopher Mies | Audi R8 LMS GT3 | Montaplast by Land-Motorsport | 1:47.3880 | 192.0543 |
| 34th | 93 | Lawson Aschenbach / Mario Farnbacher / Côme Ledogar / Justin Marks | Acura NSX GT3 | Michael Shank Racing | 1:47.4250 | 191.9883 |
| 35th | 44 | Andy Lally / Markus Winkelhock / John Potter / Andrew Davis | Audi R8 LMS GT3 | Magnus Racing | 1:47.4360 | 191.9690 |
| 36th | 58 | Patrick Long / Robert Renauer / Mathieu Jaminet / Christina Nielsen | Porsche 991 GT3 R | Wright Motorsports | 1:47.4810 | 191.8885 |
| 37th | 14 | Kyle Marcelli / Dominik Baumann / Bruno Junqueira | Lexus RCF GT3 | 3GT Racing | 1:47.4960 | 191.8612 |
| 38th | 73 | Patrick Lindsey / Jörg Bergmeister / Tim Pappas | Porsche 991 GT3 R | Park Place Motorsports | 1:47.5370 | 191.7887 |
| 39th | 48 | Bryan Sellers / Andrea Caldarelli / Madison Snow / Bryce Miller | Lamborghini Huracán GT3 | Paul Miller Racing | 1:47.5700 | 191.7292 |
| 40th | 15 | Jack Hawksworth / Dominik Farnbacher / Scott Pruett / David Heinemeier Hansson | Lexus RCF GT3 | 3GT Racing | 1:47.5900 | 191.6938 |
| 41st | 86 | Alvaro Parente / A. J. Allmendinger / Trent Hindman / Katherine Legge | Acura NSX GT3 | Michael Shank Racing | 1:47.6050 | 191.6664 |
| 42nd | 33 | Jeroen Bleekemolen / Adam Christodoulou / Ben Keating / Luca Stolz | Mercedes-AMG GT3 | Mercedes-AMG Team Riley Motorsports | 1:47.6520 | 191.5827 |
| 43rd | 69 | Ryan Eversley / Sean Rayhall / John Falb / Chad Gilsinger | Acura NSX GT3 | HART | 1:47.6650 | 191.5602 |
| 44th | 63 | Alessandro Balzan / Jeff Segal / Gunnar Jeannette / Cooper MacNeil | Ferrari 488 GT3 | Scuderia Corsa | 1:47.7260 | 191.4508 |
| 45th | 51 | Daniel Serra / Pedro Lamy / Mathias Lauda / Paul Dalla Lana | Ferrari 488 GT3 | Spirit of Race | 1:47.7520 | 191.4057 |
| 46th | 96 | Jens Klingmann / Mark Kvamme / Don Yount | BMW M6 GT3 | Turner Motorsport | 1:47.7700 | 191.3735 |
| 47th | 82 | Miguel Molina / Martin Fuentes / Ricardo Pérez de Lara / Santiago Creel | Ferrari 488 GT3 | Risi Competizione | 1:47.8140 | 191.2947 |
| 48th | 75 | Maro Engel / Thomas Jäger / Mikael Grenier / Kenny Habul | Mercedes-AMG GT3 | SunEnergy1 Racing | 1:47.9120 | 191.1209 |
| 49th | 64 | Townsend Bell / Frankie Montecalvo / Bill Sweedler / Sam Bird | Ferrari 488 GT3 | Scuderia Corsa | 1:48.0420 | 190.8923 |
| 50th | 71 | Loris Spinelli / Kenton Koch / Robby Foley / Juan Perez | Mercedes-AMG GT3 | P1 Motorsports | 1:48.0940 | 190.7990 |