Hamilton was 0.332 seconds quicker than Mercedes team-mate Valtteri Bottas after two almost-perfect laps.
Ferrari's Vettel was 0.472secs off the pace but will start alongside Hamilton on the front row because Bottas received a five-place grid penalty for a gearbox change.
Hamilton and Vettel will be battling on their own as the German's team-mate Kimi Raikkonen also drops down the grid after a penalty.
Sunday's race is live on BBC Radio 5 live and the BBC Sport website.
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