Las Vegas #2 2021 Green Flag Speeds
| Rank | Driver | Finish Pos. | Green Flag Speed |
|---|---|---|---|
| 1 | William Byron | 18 | 171.013 |
| 2 | Chase Elliott | 2 | 170.98 |
| 3 | Denny Hamlin | 1 | 170.952 |
| 4 | Kyle Busch | 3 | 170.699 |
| 5 | Kyle Larson | 10 | 170.696 |
| 6 | Ryan Blaney | 5 | 170.68 |
| 7 | Tyler Reddick | 6 | 170.147 |
| 8 | Martin Truex Jr | 4 | 170.042 |
| 9 | Matt DiBenedetto | 12 | 169.923 |
| 10 | Kevin Harvick | 9 | 169.777 |
| 11 | Alex Bowman | 22 | 169.706 |
| 12 | Brad Keselowski | 7 | 169.657 |
| 13 | Joey Logano | 11 | 169.543 |
| 14 | Kurt Busch | 8 | 169.532 |
| 15 | Austin Dillon | 13 | 169.159 |
| 16 | Christopher Bell | 24 | 168.971 |
| 17 | Chase Briscoe | 14 | 168.965 |
| 18 | Erik Jones | 26 | 168.886 |
| 19 | Chris Buescher | 25 | 168.776 |
| 20 | Bubba Wallace | 16 | 168.709 |
| 21 | Ross Chastain | 23 | 168.462 |
| 22 | Ricky Stenhouse Jr | 17 | 168.289 |
| 23 | Aric Almirola | 19 | 168.284 |
| 24 | Ryan Newman | 20 | 168.257 |
| 25 | Daniel Suarez | 15 | 168.193 |
| 26 | Michael McDowell | 21 | 168.121 |
| 27 | Anthony Alfredo | 27 | 168.105 |
| 28 | Ryan Preece | 28 | 167.987 |
| 29 | Corey Lajoie | 30 | 167.877 |
| 30 | Cole Custer | 29 | 167.715 |
| 31 | Justin Haley | 32 | 164.992 |
| 32 | Cody Ware | 31 | 164.635 |
| 33 | BJ McLeod | 33 | 162.475 |
| 34 | Quin Houff | 34 | 160.831 |
| 35 | Garrett Smithley | 35 | 160.545 |
| 36 | Josh Bilicki | 36 | 160.344 |
| 37 | Joey Gase | 37 | 158.594 |
| 38 | JJ Yeley | 38 | 157.79 |
