Hasil Latihan Bebas 1 MotoGP Aragon Spanyol 2018, Alcañiz hari Jumat 21 September 2018 :
| Pos. | Num. | Pembalap | Negara | Tim | Motor | Km/h | Waktu | Gap 1st/Prev. |
| 1 | 4 | Andrea DOVIZIOSO | ITA | Ducati Team | Ducati | 336.6 | 1’48.020 | |
| 2 | 9 | Danilo PETRUCCI | ITA | Alma Pramac Racing | Ducati | 337.9 | 1’48.210 | 0.190 / 0.190 |
| 3 | 43 | Jack MILLER | AUS | Alma Pramac Racing | Ducati | 329.3 | 1’48.734 | 0.714 / 0.524 |
| 4 | 99 | Jorge LORENZO | SPA | Ducati Team | Ducati | 336 | 1’48.751 | 0.731 / 0.017 |
| 5 | 25 | Maverick VIÑALES | SPA | Movistar Yamaha MotoGP | Yamaha | 334.4 | 1’48.803 | 0.783 / 0.052 |
| 6 | 93 | Marc MARQUEZ | SPA | Repsol Honda Team | Honda | 336.1 | 1’48.804 | 0.784 / 0.001 |
| 7 | 46 | Valentino ROSSI | ITA | Movistar Yamaha MotoGP | Yamaha | 332.5 | 1’48.958 | 0.938 / 0.154 |
| 8 | 5 | Johann ZARCO | FRA | Monster Yamaha Tech 3 | Yamaha | 333.3 | 1’49.003 | 0.983 / 0.045 |
| 9 | 35 | Cal CRUTCHLOW | GBR | LCR Honda CASTROL | Honda | 340.8 | 1’49.128 | 1.108 / 0.125 |
| 10 | 29 | Andrea IANNONE | ITA | Team SUZUKI ECSTAR | Suzuki | 334.4 | 1’49.241 | 1.221 / 0.113 |
| 11 | 42 | Alex RINS | SPA | Team SUZUKI ECSTAR | Suzuki | 333.1 | 1’49.439 | 1.419 / 0.198 |
| 12 | 44 | Pol ESPARGARO | SPA | Red Bull KTM Factory Racing | KTM | 335.2 | 1’49.526 | 1.506 / 0.087 |
| 13 | 41 | Aleix ESPARGARO | SPA | Aprilia Racing Team Gresini | Aprilia | 333.5 | 1’49.637 | 1.617 / 0.111 |
| 14 | 19 | Alvaro BAUTISTA | SPA | Angel Nieto Team | Ducati | 336.6 | 1’49.639 | 1.619 / 0.002 |
| 15 | 17 | Karel ABRAHAM | CZE | Angel Nieto Team | Ducati | 334.8 | 1’49.648 | 1.628 / 0.009 |
| 16 | 45 | Scott REDDING | GBR | Aprilia Racing Team Gresini | Aprilia | 328.5 | 1’49.780 | 1.760 / 0.132 |
| 17 | 38 | Bradley SMITH | GBR | Red Bull KTM Factory Racing | KTM | 330.8 | 1’49.900 | 1.880 / 0.120 |
| 18 | 26 | Dani PEDROSA | SPA | Repsol Honda Team | Honda | 338.8 | 1’49.944 | 1.924 / 0.044 |
| 19 | 30 | Takaaki NAKAGAMI | JPN | LCR Honda IDEMITSU | Honda | 327.3 | 1’50.070 | 2.050 / 0.126 |
| 20 | 12 | Thomas LUTHI | SWI | EG 0,0 Marc VDS | Honda | 328.2 | 1’50.219 | 2.199 / 0.149 |
| 21 | 10 | Xavier SIMEON | BEL | Reale Avintia Racing | Ducati | 325.9 | 1’50.314 | 2.294 / 0.095 |
| 22 | 21 | Franco MORBIDELLI | ITA | EG 0,0 Marc VDS | Honda | 331.5 | 1’50.377 | 2.357 / 0.063 |
| 23 | 55 | Hafizh SYAHRIN | MAL | Monster Yamaha Tech 3 | Yamaha | 329.5 | 1’50.694 | 2.674 / 0.317 |
| 24 | 81 | Jordi TORRES | SPA | Reale Avintia Racing | Ducati | 332.6 | 1’52.823 | 4.803 / 2.129 |
