Course disputée sur le circuit de Austin - Circuit of the Americas United
| Position | Numéro | Pilote | Team | Temps | Tours | Points | Départ |
|---|---|---|---|---|---|---|---|
| 1 | 5 | Romano Fenati | Sky Racing Team Vr46 | 16:27:48 | 18 | 25 | 5 |
| 2 | 9 | Jorge Navarro | Estrella Galicia 0,0 | 18:18:00 | 18 | 20 | 2 |
| 3 | 41 | Brad Binder | Red Bull KTM Ajo | 19:23:23 | 18 | 16 | 12 |
| 4 | 65 | Philipp Oettl | Schedl Gp Racing | 19:30:43 | 18 | 13 | 1 |
| 5 | 55 | Andrea Locatelli | Leopard Racing | 20:18:33 | 18 | 11 | 7 |
| 6 | 33 | Enea Bastianini | Gresini Racing Team Moto3 | 20:23:11 | 18 | 10 | 3 |
| 7 | 44 | Aron Canet | Estrella Galicia 0,0 | 20:59:37 | 18 | 9 | 22 |
| 8 | 11 | Livio Loi | Rw Racing Gp Bv | 22:31:49 | 18 | 8 | 10 |
| 9 | 95 | Jules Danilo | Ongetta-rivacold | 22:34:32 | 18 | 7 | 8 |
| 10 | 8 | Nicolo Bulega | Sky Racing Team Vr46 | 22:40:19 | 18 | 6 | 11 |
| 11 | 84 | Jakub Kornfeil | Drive M7 Sic | 22:46:22 | 18 | 5 | 4 |
| 12 | 58 | Juanfran Guevara | Rba Racing Team | 22:47:12 | 18 | 4 | 14 |
| 13 | 20 | Fabio Quartararo | Leopard Racing | 23:41:32 | 18 | 3 | 9 |
| 14 | 21 | Francesco Bagnaia | Aspar Mahindra Team Moto3 | 00:17:09 | 18 | 2 | 18 |
| 15 | 16 | Andrea Migno | Sky Racing Team Vr46 | 00:18:47 | 18 | 1 | 21 |
| 16 | 10 | Alexis Masbou | Peugeot Mc Saxoprint | 03:21:31 | 18 | 0 | 15 |
| 17 | 4 | Fabio Di Giannantonio | Gresini Racing Team Moto3 | 03:23:36 | 18 | 0 | 31 |
| 18 | 19 | Gabriel Rodrigo | Rba Racing Team | 03:30:07 | 18 | 0 | 24 |
| 19 | 24 | Tatsuki Suzuki | Cip-unicom Starker | 03:37:08 | 18 | 0 | 13 |
| 20 | 89 | Khairul Idham Pawi | Honda Team Asia | 05:49:35 | 18 | 0 | 32 |
| 21 | 17 | John Mcphee | Peugeot Mc Saxoprint | 05:53:22 | 18 | 0 | 17 |
| 22 | 64 | Bo Bendsneyder | Red Bull KTM Ajo | 05:55:10 | 18 | 0 | 23 |
| 23 | 6 | Maria Herrera | Mh6 Laglisse | 13:32:19 | 18 | 0 | 25 |
| 24 | 77 | Lorenzo Petrarca | Team Italia | 13:35:11 | 18 | 0 | 28 |
| 25 | 76 | Hiroki Ono | Honda Team Asia | 14:31:49 | 18 | 0 | 16 |
| 26 | 3 | Fabio Spiranelli | Cip-unicom Starker | 21:53:17 | 18 | 0 | 33 |
| 27 | 23 | Niccolo Antonelli | Ongetta-rivacold | 15:46:17 | 16 | 0 | 30 |
| 28 | 98 | Karel Hanika | Platinum Bay Real Estate | 11:27:18 | 11 | 0 | 19 |
| 29 | 43 | Stefano Valtulini | 3570 Team Italia | 23:29:57 | 9 | 0 | 26 |
| 30 | 88 | Jorge Martin | Aspar Mahindra Team Moto3 | 21:37:31 | 7 | 0 | 20 |
| 31 | 40 | Darryn Binder | Platinum Bay Real Estate | 16:11:11 | 5 | 0 | 29 |
| 32 | 36 | Joan Mir | Leopard Racing | 12:34:14 | 4 | 0 | 27 |
| 33 | 7 | Adam Norrodin | Drive M7 Sic | 15:54:53 | 1 | 0 | 6 |