Jimmie Johnson topped the final practice session for the NASCAR Cup Series Pennzoil 400 at Las Vegas Motor Speedway.
Click to view practice speeds at NASCAR.com
Click to view practice speeds and best 10 consecutive lap averages – pdf
Click to view best lap averages at NASCAR.com
| Pos | Car | Driver | Make | Time | Speed | Lap # | # Laps | -Fastest | -Next |
| 1 | 48 | Jimmie Johnson | Chevrolet | 30.095 | 179.432 | 6 | 46 | —.— | —.— |
| 2 | 14 | Clint Bowyer | Ford | 30.122 | 179.271 | 2 | 39 | -0.027 | -0.027 |
| 3 | 10 | Aric Almirola | Ford | 30.139 | 179.170 | 5 | 43 | -0.044 | -0.017 |
| 4 | 4 | Kevin Harvick | Ford | 30.165 | 179.015 | 3 | 41 | -0.070 | -0.026 |
| 5 | 21 | Matt DiBenedetto | Ford | 30.199 | 178.814 | 2 | 34 | -0.104 | -0.034 |
| 6 | 6 | Ross Chastain | Ford | 30.225 | 178.660 | 4 | 51 | -0.130 | -0.026 |
| 7 | 42 | Kyle Larson | Chevrolet | 30.265 | 178.424 | 40 | 48 | -0.170 | -0.040 |
| 8 | 12 | Ryan Blaney | Ford | 30.276 | 178.359 | 48 | 65 | -0.181 | -0.011 |
| 9 | 38 | John Hunter | Ford | 30.293 | 178.259 | 6 | 43 | -0.198 | -0.017 |
| 10 | 88 | Alex Bowman | Chevrolet | 30.322 | 178.089 | 8 | 36 | -0.227 | -0.029 |
| 11 | 19 | Martin Truex Jr. | Toyota | 30.332 | 178.030 | 27 | 46 | -0.237 | -0.010 |
| 12 | 24 | William Byron | Chevrolet | 30.347 | 177.942 | 31 | 42 | -0.252 | -0.015 |
| 13 | 22 | Joey Logano | Ford | 30.349 | 177.930 | 2 | 48 | -0.254 | -0.002 |
| 14 | 1 | Kurt Busch | Chevrolet | 30.350 | 177.924 | 4 | 63 | -0.255 | -0.001 |
| 15 | 17 | Chris Buescher | Ford | 30.354 | 177.901 | 2 | 40 | -0.259 | -0.004 |
| 16 | 13 | Ty Dillon | Chevrolet | 30.361 | 177.860 | 3 | 48 | -0.266 | -0.007 |
| 17 | 41 | Cole Custer # | Ford | 30.366 | 177.830 | 5 | 55 | -0.271 | -0.005 |
| 18 | 2 | Brad Keselowski | Ford | 30.380 | 177.749 | 4 | 50 | -0.285 | -0.014 |
| 19 | 11 | Denny Hamlin | Toyota | 30.418 | 177.526 | 7 | 45 | -0.323 | -0.038 |
| 20 | 95 | Christopher Bell # | Toyota | 30.420 | 177.515 | 24 | 51 | -0.325 | -0.002 |
| 21 | 3 | Austin Dillon | Chevrolet | 30.442 | 177.387 | 2 | 38 | -0.347 | -0.022 |
| 22 | 9 | Chase Elliott | Chevrolet | 30.461 | 177.276 | 27 | 31 | -0.366 | -0.019 |
| 23 | 8 | Tyler Reddick # | Chevrolet | 30.474 | 177.200 | 4 | 56 | -0.379 | -0.013 |
| 24 | 47 | Ricky Stenhouse Jr. | Chevrolet | 30.481 | 177.160 | 4 | 29 | -0.386 | -0.007 |
| 25 | 37 | Ryan Preece | Chevrolet | 30.491 | 177.101 | 2 | 29 | -0.396 | -0.010 |
| 26 | 34 | Michael McDowell | Ford | 30.520 | 176.933 | 4 | 39 | -0.425 | -0.029 |
| 27 | 20 | Erik Jones | Toyota | 30.524 | 176.910 | 31 | 44 | -0.429 | -0.004 |
| 28 | 18 | Kyle Busch | Toyota | 30.543 | 176.800 | 8 | 50 | -0.448 | -0.019 |
| 29 | 43 | Bubba Wallace | Chevrolet | 30.653 | 176.165 | 34 | 35 | -0.558 | -0.110 |
| 30 | 96 | Daniel Suarez | Toyota | 30.833 | 175.137 | 1 | 33 | -0.738 | -0.180 |
| 31 | 32 | Corey LaJoie | Ford | 31.020 | 174.081 | 9 | 25 | -0.925 | -0.187 |
| 32 | 15 | Brennan Poole # | Chevrolet | 31.179 | 173.193 | 4 | 6 | -1.084 | -0.159 |
| 33 | 00 | Quin Houff # | Chevrolet | 31.370 | 172.139 | 8 | 8 | -1.275 | -0.191 |
| 34 | 52 | JJ Yeley | Ford | 31.378 | 172.095 | 9 | 11 | -1.283 | -0.008 |
| 35 | 77 | Reed Sorenson | Chevrolet | 31.480 | 171.537 | 2 | 13 | -1.385 | -0.102 |
| 36 | 53 | Joey Gase | Ford | 31.980 | 168.856 | 7 | 9 | -1.885 | -0.500 |
| 37 | 51 | Garrett Smithley | Chevrolet | 32.274 | 167.317 | 2 | 7 | -2.179 | -0.294 |
| 38 | 66 | Timmy Hill | Toyota | 32.905 | 164.109 | 7 | 10 | -2.810 | -0.631 |
Best 10 Consecutive Lap Averages
| Pos | Car | Driver | From Lap | To Lap | Avg Speed |
| 1 | 4 | Kevin Harvick | 27 | 36 | 177.636 |
| 2 | 48 | Jimmie Johnson | 2 | 11 | 177.500 |
| 3 | 6 | Ross Chastain | 2 | 11 | 177.416 |
| 4 | 88 | Alex Bowman | 1 | 10 | 177.375 |
| 5 | 1 | Kurt Busch | 2 | 11 | 177.084 |
| 6 | 14 | Clint Bowyer | 1 | 10 | 176.927 |
| 7 | 24 | William Byron | 2 | 11 | 176.838 |
| 8 | 11 | Denny Hamlin | 7 | 16 | 176.831 |
| 9 | 42 | Kyle Larson | 2 | 11 | 176.822 |
| 10 | 10 | Aric Almirola | 24 | 33 | 176.723 |
| 11 | 38 | John Hunter Nemechek # | 1 | 10 | 176.599 |
| 12 | 13 | Ty Dillon | 2 | 11 | 176.582 |
| 13 | 95 | Christopher Bell # | 24 | 33 | 176.581 |
| 14 | 2 | Brad Keselowski | 3 | 12 | 176.553 |
| 15 | 18 | Kyle Busch | 2 | 11 | 176.459 |
| 16 | 9 | Chase Elliott | 3 | 12 | 176.345 |
| 17 | 41 | Cole Custer # | 1 | 10 | 176.205 |
| 18 | 12 | Ryan Blaney | 46 | 55 | 176.193 |
| 19 | 8 | Tyler Reddick # | 2 | 11 | 176.193 |
| 20 | 22 | Joey Logano | 1 | 10 | 176.150 |
| 21 | 17 | Chris Buescher | 2 | 11 | 175.972 |
| 22 | 19 | Martin Truex Jr. | 10 | 19 | 175.937 |
| 23 | 47 | Ricky Stenhouse Jr. | 10 | 19 | 175.651 |
| 24 | 3 | Austin Dillon | 28 | 37 | 175.301 |
| 25 | 20 | Erik Jones | 28 | 37 | 174.984 |
| 26 | 34 | Michael McDowell | 22 | 31 | 174.804 |
| 27 | 43 | Bubba Wallace | 9 | 18 | 174.672 |
| 28 | 96 | Daniel Suarez | 7 | 16 | 173.596 |
| 29 | 32 | Corey LaJoie | 6 | 15 | 173.425 |
