Großer Preis der USA 2018 / Austin
3. Training
| Pos. | Nr. | Fahrer | Team | Zeit | Rückstand | Rdn. |
|---|---|---|---|---|---|---|
| 1 | 5 |  | Ferrari | 1.33.797 | --- | 20 |
| 2 | 7 | | Ferrari | 1.33.843 | + 0.046 | 20 |
| 3 | 44 | | Mercedes | 1.33.870 | + 0.073 | 23 |
| 4 | 77 | | Mercedes | 1.34.556 | + 0.759 | 21 |
| 5 | 33 | | Red Bull | 1.34.703 | + 0.906 | 21 |
| 6 | 3 | | Red Bull | 1.34.910 | + 1.113 | 20 |
| 7 | 16 | | Sauber | 1.35.365 | + 1.568 | 21 |
| 8 | 11 | | Force India (Racing Point) | 1.35.411 | + 1.614 | 21 |
| 9 | 55 | | Renault | 1.35.450 | + 1.653 | 21 |
| 10 | 8 | | Haas F1 | 1.35.468 | + 1.671 | 19 |
| 11 | 31 | | Force India (Racing Point) | 1.35.562 | + 1.765 | 22 |
| 12 | 10 | | Toro Rosso | 1.35.713 | + 1.916 | 27 |
| 13 | 20 | | Haas F1 | 1.35.770 | + 1.973 | 19 |
| 14 | 27 | | Renault | 1.35.882 | + 2.085 | 19 |
| 15 | 9 | | Sauber | 1.36.000 | + 2.203 | 21 |
| 16 | 18 | | Williams | 1.36.188 | + 2.391 | 21 |
| 17 | 35 | | Williams | 1.36.193 | + 2.396 | 20 |
| 18 | 2 | | McLaren | 1.36.302 | + 2.505 | 23 |
| 19 | 28 | | Toro Rosso | 1.36.330 | + 2.533 | 26 |
| 20 | 14 | | McLaren | 1.36.332 | + 2.535 | 20 |
