Daniel Ricciardo et Max Verstappen ont été les plus rapide de la première séance d’essais libres à Singapour. On retrouve ensuite les Ferrari et Nico Hulkenberg. Lewis Hamilton est 6e.
| Pos | No | Pilote | Équipe | Temps | Écart | Tours |
|---|---|---|---|---|---|---|
| 1 | 3 | Daniel Ricciardo | Red Bull Racing TAG Heuer | 1:39.711 | 27 | |
| 2 | 33 | Max Verstappen | Red Bull Racing TAG Heuer | 1:39.912 | +0.201s | 27 |
| 3 | 5 | Sebastian Vettel | Ferrari | 1:39.997 | +0.286s | 23 |
| 4 | 7 | Kimi Räikkönen | Ferrari | 1:40.486 | +0.775s | 21 |
| 5 | 27 | Nico Hulkenberg | Renault | 1:41.105 | +1.394s | 26 |
| 6 | 44 | Lewis Hamilton | Mercedes | 1:41.232 | +1.521s | 28 |
| 7 | 55 | Carlos Sainz | Renault | 1:41.329 | +1.618s | 23 |
| 8 | 77 | Valtteri Bottas | Mercedes | 1:41.429 | +1.718s | 28 |
| 9 | 16 | Charles Leclerc | Sauber Ferrari | 1:42.035 | +2.324s | 24 |
| 10 | 8 | Romain Grosjean | Haas Ferrari | 1:42.108 | +2.397s | 21 |
| 11 | 9 | Marcus Ericsson | Sauber Ferrari | 1:42.408 | +2.697s | 23 |
| 12 | 11 | Sergio Perez | Force India Mercedes | 1:42.412 | +2.701s | 25 |
| 13 | 20 | Kevin Magnussen | Haas Ferrari | 1:42.452 | +2.741s | 20 |
| 14 | 14 | Fernando Alonso | McLaren Renault | 1:42.630 | +2.919s | 23 |
| 15 | 31 | Esteban Ocon | Force India Mercedes | 1:43.177 | +3.466s | 25 |
| 16 | 10 | Pierre Gasly | Scuderia Toro Rosso Honda | 1:43.240 | +3.529s | 25 |
| 17 | 28 | Brendon Hartley | Scuderia Toro Rosso Honda | 1:43.485 | +3.774s | 30 |
| 18 | 18 | Lance Stroll | Williams Mercedes | 1:43.849 | +4.138s | 30 |
| 19 | 35 | Sergey Sirotkin | Williams Mercedes | 1:44.036 | +4.325s | 29 |
| 20 | 2 | Stoffel Vandoorne | McLaren Renault | 1:45.160 | +5.449s | 11 |