The most accurate 2021 Seat Leons MPG estimates based on real world results of 70 thousand miles driven in 10 Seat Leons. Click here to see important news regarding the aCar App. Fuelly. Log In; Community . MPG Tips; Forums; Support 187 fuel-ups and 69,663 miles of driving, the 2021 Seat Leon gets a combined Avg MPG of 35.51 with a 0.80 MPG 1 Introduction 2 Driving 3 Interior 4 Practicality 5 Buying & owning Watch video Open Gallery What Car?'s Leon deals New car deals Target Price from £21,304 Save up to £2,798 or from £255pm .

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