Monster Energy Cup Series – Dover International Speedway
See Also: First Practice Speeds | Second Practice Canceled
| Pos | Car | Driver | Make | Time | Speed | Lap # | # Laps | -Fastest | -Next |
| 1 | 48 | Jimmie Johnson | Chevrolet | 22.241 | 161.863 | 4 | 59 | —.— | —.— |
| 2 | 19 | Martin Truex Jr. | Toyota | 22.261 | 161.718 | 2 | 66 | -0.020 | -0.020 |
| 3 | 20 | Erik Jones | Toyota | 22.300 | 161.435 | 1 | 63 | -0.059 | -0.039 |
| 4 | 42 | Kyle Larson | Chevrolet | 22.341 | 161.139 | 18 | 60 | -0.100 | -0.041 |
| 5 | 10 | Aric Almirola | Ford | 22.373 | 160.908 | 1 | 39 | -0.132 | -0.032 |
| 6 | 41 | Daniel Suarez | Ford | 22.379 | 160.865 | 3 | 68 | -0.138 | -0.006 |
| 7 | 24 | William Byron | Chevrolet | 22.384 | 160.829 | 4 | 71 | -0.143 | -0.005 |
| 8 | 1 | Kurt Busch | Chevrolet | 22.443 | 160.406 | 3 | 42 | -0.202 | -0.059 |
| 9 | 14 | Clint Bowyer | Ford | 22.458 | 160.299 | 4 | 69 | -0.217 | -0.015 |
| 10 | 9 | Chase Elliott | Chevrolet | 22.471 | 160.206 | 5 | 64 | -0.230 | -0.013 |
| 11 | 11 | Denny Hamlin | Toyota | 22.478 | 160.157 | 2 | 58 | -0.237 | -0.007 |
| 12 | 18 | Kyle Busch | Toyota | 22.505 | 159.964 | 2 | 62 | -0.264 | -0.027 |
| 13 | 12 | Ryan Blaney | Ford | 22.522 | 159.844 | 4 | 52 | -0.281 | -0.017 |
| 14 | 4 | Kevin Harvick | Ford | 22.530 | 159.787 | 4 | 60 | -0.289 | -0.008 |
| 15 | 2 | Brad Keselowski | Ford | 22.537 | 159.737 | 4 | 56 | -0.296 | -0.007 |
| 16 | 22 | Joey Logano | Ford | 22.547 | 159.666 | 5 | 81 | -0.306 | -0.010 |
| 17 | 21 | Paul Menard | Ford | 22.578 | 159.447 | 3 | 50 | -0.337 | -0.031 |
| 18 | 3 | Austin Dillon | Chevrolet | 22.581 | 159.426 | 5 | 47 | -0.340 | -0.003 |
| 19 | 17 | Ricky Stenhouse Jr. | Ford | 22.617 | 159.172 | 7 | 35 | -0.376 | -0.036 |
| 20 | 6 | Ryan Newman | Ford | 22.629 | 159.088 | 1 | 31 | -0.388 | -0.012 |
| 21 | 88 | Alex Bowman | Chevrolet | 22.631 | 159.074 | 7 | 47 | -0.390 | -0.002 |
| 22 | 43 | Bubba Wallace | Chevrolet | 22.670 | 158.800 | 6 | 55 | -0.429 | -0.039 |
| 23 | 8 | Daniel Hemric # | Chevrolet | 22.692 | 158.646 | 5 | 47 | -0.451 | -0.022 |
| 24 | 37 | Chris Buescher | Chevrolet | 22.743 | 158.290 | 2 | 46 | -0.502 | -0.051 |
| 25 | 13 | Ty Dillon | Chevrolet | 22.826 | 157.715 | 10 | 42 | -0.585 | -0.083 |
| 26 | 95 | Matt DiBenedetto | Toyota | 22.853 | 157.529 | 1 | 30 | -0.612 | -0.027 |
| 27 | 47 | Ryan Preece # | Chevrolet | 22.934 | 156.972 | 2 | 19 | -0.693 | -0.081 |
| 28 | 32 | Corey LaJoie | Ford | 22.941 | 156.924 | 1 | 27 | -0.700 | -0.007 |
| 29 | 34 | Michael McDowell | Ford | 22.968 | 156.740 | 3 | 20 | -0.727 | -0.027 |
| 30 | 38 | David Ragan | Ford | 23.027 | 156.338 | 16 | 44 | -0.786 | -0.059 |
| 31 | 15 | Ross Chastain | Chevrolet | 23.264 | 154.746 | 2 | 16 | -1.023 | -0.237 |
| 32 | 36 | Matt Tifft # | Ford | 23.354 | 154.149 | 14 | 19 | -1.113 | -0.090 |
| 33 | 00 | Landon Cassill | Chevrolet | 23.466 | 153.413 | 28 | 45 | -1.225 | -0.112 |
| 34 | 52 | BJ McLeod | Chevrolet | 23.506 | 153.152 | 7 | 10 | -1.265 | -0.040 |
| 35 | 51 | Cody Ware | Ford | 23.617 | 152.433 | 12 | 15 | -1.376 | -0.111 |
| 36 | 77 | Quin Houff | Chevrolet | 23.965 | 150.219 | 6 | 7 | -1.724 | -0.348 |
| 37 | 27 | Reed Sorenson | Chevrolet | 24.171 | 148.939 | 12 | 14 | -1.930 | -0.206 |
Best 10 Consecutive Lap Average
| Pos | Car | Driver | From Lap | To Lap | Avg Speed |
| 1 | 42 | Kyle Larson | 18 | 27 | 159.747 |
| 2 | 20 | Erik Jones | 1 | 10 | 159.562 |
| 3 | 19 | Martin Truex Jr. | 1 | 10 | 159.442 |
| 4 | 4 | Kevin Harvick | 3 | 12 | 159.417 |
| 5 | 2 | Brad Keselowski | 3 | 12 | 159.145 |
| 6 | 41 | Daniel Suarez | 1 | 10 | 159.069 |
| 7 | 9 | Chase Elliott | 4 | 13 | 158.858 |
| 8 | 18 | Kyle Busch | 2 | 11 | 158.754 |
| 9 | 22 | Joey Logano | 1 | 10 | 158.732 |
| 10 | 24 | William Byron | 20 | 29 | 158.589 |
| 11 | 10 | Aric Almirola | 10 | 19 | 158.445 |
| 12 | 14 | Clint Bowyer | 3 | 12 | 158.432 |
| 13 | 12 | Ryan Blaney | 1 | 10 | 158.328 |
| 14 | 11 | Denny Hamlin | 1 | 10 | 158.127 |
| 15 | 88 | Alex Bowman | 14 | 23 | 158.025 |
| 16 | 48 | Jimmie Johnson | 32 | 41 | 157.984 |
| 17 | 21 | Paul Menard | 1 | 10 | 157.686 |
| 18 | 1 | Kurt Busch | 20 | 29 | 157.107 |
| 19 | 8 | Daniel Hemric # | 2 | 11 | 156.257 |
| 20 | 38 | David Ragan | 14 | 23 | 155.815 |
| 21 | 43 | Bubba Wallace | 21 | 30 | 155.668 |
| 22 | 13 | Ty Dillon | 27 | 36 | 155.566 |
| 23 | 6 | Ryan Newman | 20 | 29 | 154.582 |
| 24 | 00 | Landon Cassill | 5 | 14 | 152.384 |
| 25 | 51 | Cody Ware | 5 | 14 | 150.964 |
| 26 | 3 | Austin Dillon | 32 | 41 | 150.082 |
