Las Vegas #1 2021 NASCAR Speed By Segment
| Rank | Driver | Finish | Q1 | Q2 | Q3 | Q4 | Total |
|---|---|---|---|---|---|---|---|
| 1 | William Byron | 33 | 1.802 | 2.042 | 0.938 | 4.265 | 2.262 |
| 2 | Kyle Busch | 20 | 1.269 | 1.59 | 0.88 | 2.286 | 1.506 |
| 3 | Kyle Larson | 3 | 1.821 | 2.275 | 1.278 | 0.572 | 1.487 |
| 4 | Chase Elliott | 4 | 2.126 | 1.884 | 1.127 | 0.476 | 1.403 |
| 5 | Joey Logano | 34 | 1.366 | 0.036 | 0.3 | 3.175 | 1.219 |
| 6 | Martin Truex Jr | 15 | 0.834 | 1.228 | 0.974 | 0.778 | 0.954 |
| 7 | Cole Custer | 25 | 1.03 | 1.356 | 0.507 | 0.399 | 0.823 |
| 8 | Chase Briscoe | 26 | 1.821 | 1.557 | -0.089 | -0.354 | 0.734 |
| 9 | Christopher Bell | 36 | -0.01 | 0.363 | 0.365 | 1.292 | 0.503 |
| 10 | Tyler Reddick | 21 | 0.822 | 0.303 | 0.239 | 0.618 | 0.496 |
| 11 | Denny Hamlin | 23 | 0.505 | 1.317 | 0.859 | -0.742 | 0.485 |
| 12 | Kurt Busch | 6 | 0.273 | 0.844 | 0.317 | 0.126 | 0.39 |
| 13 | Ryan Blaney | 2 | 0.585 | 0.05 | 0.251 | 0.28 | 0.292 |
| 14 | Alex Bowman | 17 | -0.151 | 0.5 | 0.591 | 0.022 | 0.241 |
| 15 | AJ Allmendinger | 1 | 0.978 | -0.649 | 0.336 | 0.204 | 0.217 |
| 16 | Kevin Harvick | 14 | -0.387 | 0.215 | 0.069 | 0.606 | 0.126 |
| 17 | Ross Chastain | 29 | 0.231 | 0.262 | 0.158 | -0.175 | 0.119 |
| 18 | Austin Dillon | 31 | 0.331 | 0.217 | -0.167 | -0.169 | 0.053 |
| 19 | Ryan Preece | 35 | -0.255 | 0.087 | -0.042 | 0.321 | 0.028 |
| 20 | Austin Cindric | 9 | -0.527 | 0.326 | 0.149 | 0.145 | 0.023 |
| 21 | Michael McDowell | 30 | 0.581 | -0.928 | 0.352 | -0.01 | -0.001 |
| 22 | Ricky Stenhouse Jr | 11 | -0.448 | -0.785 | 0.005 | 0.071 | -0.289 |
| 23 | Daniel Suarez | 37 | 1.029 | -0.058 | -0.108 | -2.055 | -0.298 |
| 24 | Justin Haley | 8 | -0.494 | -0.23 | -0.424 | -0.056 | -0.301 |
| 25 | Matt DiBenedetto | 5 | -0.109 | -0.402 | -0.872 | 0.07 | -0.328 |
| 26 | Chris Buescher | 12 | -0.527 | -1.129 | 0.008 | -0.141 | -0.447 |
| 27 | Bubba Wallace | 13 | -1.027 | -0.777 | 0.013 | -0.193 | -0.496 |
| 28 | Erik Jones | 7 | -0.301 | -1.477 | -0.741 | -0.08 | -0.65 |
| 29 | Corey Lajoie | 16 | -0.99 | -0.479 | -0.583 | -0.77 | -0.706 |
| 30 | Ryan Newman | 10 | -1.19 | -1.22 | -2.032 | 1.097 | -0.836 |
| 31 | James Davison | 32 | -1.067 | -1.536 | -1.344 | 0.305 | -0.911 |
| 32 | Josh Bilicki | 18 | -1.196 | -1.457 | -1.369 | -0.614 | -1.159 |
| 33 | Aric Almirola | 19 | -0.862 | -1.902 | -1.274 | -0.77 | -1.202 |
| 34 | Quin Houff | 22 | -2.718 | -2.149 | -1.867 | 0.116 | -1.655 |
| 35 | Brad Keselowski | 24 | -0.389 | -1.973 | -2.731 | -1.83 | -1.731 |
| 36 | Garrett Smithley | 28 | -3.328 | -3.216 | -2.758 | -0.8 | -2.526 |
| 37 | Timmy Hill | 27 | -3.338 | -4.032 | -4.465 | -0.432 | -3.067 |
| 38 | Anthony Alfredo | 38 | -2.296 | -1.309 | -1.853 | ||
| 39 | Andy Lally | 39 | -1.098 | -0.84 | -1.835 | ||
| 40 | Cody Ware | 40 | -2.076 | -2.758 |
