Lewis lead away from pole and despite some early pressure, was never headed, leading every lap and clocking the fastest laptime of the race to complete his fourth career Grand Slam and the second of this season.
“It's been such an incredible weekend,” said Lewis. “I just couldn't be happier with how it's gone and I'm so grateful for this result.
“We came away from Monaco and we were scratching our heads, but we pulled together and look what we achieved. We came here with a much better understanding of the car and we delivered a real blow to the Ferraris.
“Valtteri did a fantastic job too and this is our first one-two finish together. We've scored a big load of solid points and it's well deserved.
“It's crazy to think I had my first pole and win here 10 years ago. The race actually felt very reminiscent of 2007, in terms of how it unfolded. It's a long race here, especially when you're out there on your own, but I knew the car would hold together and it did perfectly.”