Bearman bounced back after a tricky weekend last time out in Monaco to take another victory, having secured a clean sweep at the previous round in Baku.
It marked Prema’s second win of the weekend, with team-mate Frederik Vesti taking victory in Saturday’s sprint race.
Fighting off a challenge from Enzo Fittipaldi (Rodin Carlin) at the start, Bearman was able to break the DRS chain by lap six to hold a 1.6s lead as Fittipaldi fought ART driver Theo Pourchaire for second.
As the field cycled through pitstops, Bearman was able to hold out later than his rivals as he managed his tyres well before stopping for the hard compound on lap 13 and emerging in 12th.
He cut through those ahead who were yet to stop with ease, and took back control on lap 25 as Victor Martins, running on the alternate strategy having started seventh, pitted from the lead.
Bearman led by 4.4s from Fittipaldi by lap 30, with another six seconds to Ayumu Iwasa (DAMS), before Martins took advantage of his soft tyres to secure third with two laps remaining.
Iwasa had a strong start, with Fittipaldi almost attempting a move on Bearman at Turn 1 before running wide and heading around the bollard.
Fittipaldi and Pourchaire tussled for second, while Iwasa attempted to get in on the top three but settled for fourth, as Doohan fell back to fifth.
The stops began on lap six, with Campos Racing driver Ralph Boschung the first to take new tyres.
Source: Autosport