Firestone Grand Prix of St.
Petersburg
St. Petersburg Street Circuit
1.8 Mile Street Course
110 Laps/198 Miles
March 11, 2018
| Finish | Start | Driver | Car # | Sponsor/Name | Chassis | Engine | Laps | Status | Points |
| 1 | 14 | Sébastien Bourdais | 18 | SealMaster | Dallara UAK 18 | Honda | 110 | 2:17:48.4954 86.207 | 51 |
| 2 | 24 | Graham Rahal | 15 | United Rentals | Dallara UAK 18 | Honda | 110 | 2:17:48.6223 86.205 | 40 |
| 3 | 12 | Alexander Rossi | 27 | NAPA Auto Parts | Dallara UAK 18 | Honda | 110 | 2:17:49.2063 86.199 | 36 |
| 4 | 7 | James Hinchcliffe | 5 | Arrow Electronics/Lucas Oil | Dallara UAK 18 | Honda | 110 | 2:17:50.0129 86.191 | 32 |
| 5 | 6 | Ryan Hunter-Reay | 28 | DHL | Dallara UAK 18 | Honda | 110 | 2:17:50.4861 86.186 | 31 |
| 6 | 9 | Scott Dixon | 9 | PNC Bank | Dallara UAK 18 | Honda | 110 | 2:17:50.7670 86.183 | 28 |
| 7 | 13 | Josef Newgarden | 1 | Hitachi | Dallara UAK 18 | Chevy | 110 | 2:17:51.8796 86.171 | 26 |
| 8 | 17 | Ed Jones | 10 | NTT DATA | Dallara UAK 18 | Honda | 110 | 2:17:52.7946 86.162 | 24 |
| 9 | 18 | Marco Andretti | 98 | Ruoff Home Mortgage/Curb Records | Dallara UAK 18 | Honda | 110 | 2:17:53.3317 86.156 | 22 |
| 10 | 2 | Will Power | 12 | Verizon | Dallara UAK 18 | Chevy | 110 | 2:17:54.6226 86.143 | 20 |
| 11 | 10 | Tony Kanaan | 14 | ABC Supply | Dallara UAK 18 | Chevy | 110 | 2:17:55.0130 86.139 | 19 |
| 12 | 5 | Takuma Sato | 30 | Panasonic/Mi-Jack | Dallara UAK 18 | Honda | 110 | 2:17:55.8959 86.130 | 18 |
| 13 | 11 | Simon Pagenaud | 22 | Menards | Dallara UAK 18 | Chevy | 110 | 2:17:56.4857 86.124 | 17 |
| 14 | 8 | Gabby Chaves | 88 | Harding Group | Dallara UAK 18 | Chevy | 110 | 2:17:57.7226 86.111 | 16 |
| 15 | 16 | Spencer Pigot | 21 | Autogeek | Dallara UAK 18 | Chevy | 109 | Flagged | 15 |
| 16 | 15 | Zach Veach | 26 | Group One Thousand One | Dallara UAK 18 | Honda | 109 | Flagged | 14 |
| 17 | 22 | Zachary Claman DeMelo | 19 | Paysafe/Embratel/Claro | Dallara UAK 18 | Honda | 109 | Flagged | 13 |
| 18 | 1 | Robert Wickens | 6 | Lucas Oil | Dallara UAK 18 | Honda | 108 | Wrecked | 16 |
| 19 | 20 | Max Chilton | 59 | Gallagher | Dallara UAK 18 | Chevy | 108 | Flagged | 11 |
| 20 | 21 | Charlie Kimball | 23 | Tresiba | Dallara UAK 18 | Chevy | 107 | Flagged | 10 |
| 21 | 4 | Jordan King | 20 | Fuzzy's Ultra Premium Vodka | Dallara UAK 18 | Chevy | 107 | Flagged | 10 |
| 22 | 23 | René Binder | 32 | binderholz tiptop timber | Dallara UAK 18 | Chevy | 100 | Wrecked | 8 |
| 23 | 19 | Jack Harvey | 60 | SiriusXM/AutoNation | Dallara UAK 18 | Honda | 38 | Wrecked | 7 |
| 24 | 3 | Matheus Leist | 4 | ABC Supply | Dallara UAK 18 | Chevy | 16 | Wrecked | 6 |
| Lap Leaders | Total | Laps |
| Robert Wickens | 69 | 1-5, 11-24, 39-59, 77-81, 85-108 |
| Sébastien Bourdais | 30 | 25-38, 63-76, 109-110 |
| Jordan King | 5 | 6-10 |
| Alexander Rossi | 5 | 60-62, 82-83 |
| Ryan Hunter-Reay | 1 | 84 |