Course disputée sur le circuit de Austin - Circuit of the Americas United
| Position | Numéro | Pilote | Team | Temps | Tours | Points | Départ |
|---|---|---|---|---|---|---|---|
| 1 | 5 | Romano Fenati | Marinelli Rivacold Snipers | 23:24:01 | 12 | 25 | 3 |
| 2 | 88 | Jorge Martin | Del Conca Gresini Racing Moto3 | 00:39:05 | 12 | 20 | 5 |
| 3 | 21 | Fabio Di Giannantonio | Del Conca Gresini Racing Moto3 | 00:39:28 | 12 | 16 | 6 |
| 4 | 33 | Enea Bastianini | Estrella Galicia 0,0 | 00:41:54 | 12 | 13 | 7 |
| 5 | 8 | Nicolo Bulega | Sky Racing Team Vr46 | 00:46:49 | 12 | 11 | 4 |
| 6 | 58 | Juanfran Guevara | Rba Racing Team | 00:57:39 | 12 | 10 | 13 |
| 7 | 17 | John Mcphee | British Talent Team | 00:58:48 | 12 | 9 | 9 |
| 8 | 36 | Joan Mir | Leopard Racing | 01:01:33 | 12 | 8 | 2 |
| 9 | 65 | Philipp Oettl | Südmetall Schedl Gp Racing | 01:13:55 | 12 | 7 | 15 |
| 10 | 40 | Darryn Binder | Platinum Bay Real Estate | 02:55:50 | 12 | 6 | 11 |
| 11 | 19 | Gabriel Rodrigo | Rba Racing Team | 03:04:41 | 12 | 5 | 14 |
| 12 | 16 | Andrea Migno | Sky Racing Team Vr46 | 03:05:26 | 12 | 4 | 19 |
| 13 | 95 | Jules Danilo | Marinelli Rivacold Snipers | 03:05:31 | 12 | 3 | 21 |
| 14 | 23 | Niccolo Antonelli | Red Bull KTM Ajo | 03:07:33 | 12 | 2 | 8 |
| 15 | 11 | Livio Loi | Leopard Racing | 03:08:52 | 12 | 1 | 16 |
| 16 | 42 | Marcos Ramirez | Platinum Bay Real Estate | 06:02:43 | 12 | 0 | 20 |
| 17 | 12 | Marco Bezzecchi | Cip | 06:09:48 | 12 | 0 | 26 |
| 18 | 71 | Ayumu Sasaki | Sic Racing Team | 06:14:51 | 12 | 0 | 17 |
| 19 | 7 | Adam Norrodin | Sic Racing Team | 06:17:16 | 12 | 0 | 25 |
| 20 | 14 | Tony Arbolino | Sic58 Squadra Corse | 06:23:27 | 12 | 0 | 12 |
| 21 | 75 | Albert Arenas | Aspar Mahindra Team Moto3 | 06:50:52 | 12 | 0 | 22 |
| 22 | 6 | Maria Herrera | Agr Team | 07:01:12 | 12 | 0 | 24 |
| 23 | 84 | Jakub Kornfeil | Peugeot Mc Saxoprint | 09:56:41 | 12 | 0 | 23 |
| 24 | 41 | Nakarin Atiratphuvapat | Honda Team Asia | 10:54:09 | 12 | 0 | 32 |
| 25 | 96 | Manuel Pagliani | Cip | 11:33:50 | 12 | 0 | 29 |
| 26 | 48 | Lorenzo Dalla Porta | Aspar Mahindra Team Moto3 | 11:37:25 | 12 | 0 | 28 |
| 27 | 4 | Patrik Pulkkinen | Peugeot Mc Saxoprint | 13:35:12 | 12 | 0 | 30 |
| 28 | 18 | Gabriel Martinez-abrego | Motomex Team Moto3 | 13:41:19 | 12 | 0 | 31 |
| 29 | 24 | Tatsuki Suzuki | Sic58 Squadra Corse | 08:21:41 | 9 | 0 | 18 |
| 30 | 27 | Kaito Toba | Honda Team Asia | 04:56:18 | 3 | 0 | 27 |
| 31 | 44 | Aron Canet | Estrella Galicia 0,0 | 18:18:52 | 3 | 0 | 1 |