Hasil Latihan Bebas 1 Moto3 Aragon Spanyol, Alcañiz 21 September 2018 :
| Pos. | Num. | Pembalap | Negara | Tim | Motor | Km/h | Waktu | Gap 1st/Prev. |
| 1 | 84 | Jakub KORNFEIL | CZE | Redox PruestelGP | KTM | 233.7 | 1’59.206 | |
| 2 | 19 | Gabriel RODRIGO | ARG | RBA BOE Skull Rider | KTM | 230.2 | 1’59.434 | 0.228 / 0.228 |
| 3 | 12 | Marco BEZZECCHI | ITA | Redox PruestelGP | KTM | 231.9 | 1’59.835 | 0.629 / 0.401 |
| 4 | 65 | Philipp OETTL | GER | Sudmetal Schedl GP Racing | KTM | 226.2 | 1’59.885 | 0.679 / 0.050 |
| 5 | 88 | Jorge MARTIN | SPA | Del Conca Gresini Moto3 | Honda | 230.1 | 1’59.982 | 0.776 / 0.097 |
| 6 | 22 | Kazuki MASAKI | JPN | RBA BOE Skull Rider | KTM | 230.2 | 2’00.163 | 0.957 / 0.181 |
| 7 | 77 | Vicente PEREZ | SPA | Reale Avintia Academy 77 | KTM | 229.7 | 2’00.190 | 0.984 / 0.027 |
| 8 | 33 | Enea BASTIANINI | ITA | Leopard Racing | Honda | 229.2 | 2’00.206 | 1.000 / 0.016 |
| 9 | 8 | Nicolo BULEGA | ITA | SKY Racing Team VR46 | KTM | 233.1 | 2’00.216 | 1.010 / 0.010 |
| 10 | 75 | Albert ARENAS | SPA | Angel Nieto Team Moto3 | KTM | 226.5 | 2’00.341 | 1.135 / 0.125 |
| 11 | 10 | Dennis FOGGIA | ITA | SKY Racing Team VR46 | KTM | 228.6 | 2’00.421 | 1.215 / 0.080 |
| 12 | 17 | John MCPHEE | GBR | CIP – Green Power | KTM | 229.9 | 2’00.426 | 1.220 / 0.005 |
| 13 | 14 | Tony ARBOLINO | ITA | Marinelli Snipers Team | Honda | 231.2 | 2’00.473 | 1.267 / 0.047 |
| 14 | 16 | Andrea MIGNO | ITA | Angel Nieto Team Moto3 | KTM | 231.3 | 2’00.562 | 1.356 / 0.089 |
| 15 | 5 | Jaume MASIA | SPA | Bester Capital Dubai | KTM | 227.3 | 2’00.575 | 1.369 / 0.013 |
| 16 | 25 | Raul FERNANDEZ | SPA | Angel Nieto Team | KTM | 225.9 | 2’00.666 | 1.460 / 0.091 |
| 17 | 44 | Aron CANET | SPA | Estrella Galicia 0,0 | Honda | 220.5 | 2’00.722 | 1.516 / 0.056 |
| 18 | 48 | Lorenzo DALLA PORTA | ITA | Leopard Racing | Honda | 229.7 | 2’00.904 | 1.698 / 0.182 |
| 19 | 81 | Stefano NEPA | ITA | CIP – Green Power | KTM | 230 | 2’00.986 | 1.780 / 0.082 |
| 20 | 42 | Marcos RAMIREZ | SPA | Bester Capital Dubai | KTM | 226.7 | 2’01.214 | 2.008 / 0.228 |
| 21 | 23 | Niccolò ANTONELLI | ITA | SIC58 Squadra Corse | Honda | 227.5 | 2’01.495 | 2.289 / 0.281 |
| 22 | 40 | Darryn BINDER | RSA | Red Bull KTM Ajo | KTM | 226 | 2’01.739 | 2.533 / 0.244 |
| 23 | 7 | Adam NORRODIN | MAL | Petronas Sprinta Racing | Honda | 223.9 | 2’01.856 | 2.650 / 0.117 |
| 24 | 24 | Tatsuki SUZUKI | JPN | SIC58 Squadra Corse | Honda | 229.5 | 2’01.923 | 2.717 / 0.067 |
| 25 | 72 | Alonso LOPEZ | SPA | Estrella Galicia 0,0 | Honda | 221.5 | 2’01.942 | 2.736 / 0.019 |
| 26 | 21 | Fabio DI GIANNANTONIO | ITA | Del Conca Gresini Moto3 | Honda | 228.7 | 2’01.982 | 2.776 / 0.040 |
| 27 | 41 | Nakarin ATIRATPHUVAPAT | THA | Honda Team Asia | Honda | 224.8 | 2’02.160 | 2.954 / 0.178 |
| 28 | 27 | Kaito TOBA | JPN | Honda Team Asia | Honda | 227 | 2’03.372 | 4.166 / 1.212 |
| 29 | 52 | Jeremy ALCOBA | SPA | Junior Team Estrella Galicia 0,0 | Honda | 221.5 | 2’03.555 | 4.349 / 0.183 |
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