Three strikes in the opening half secured a comprehensive lead at the break, while Chris Whelpdale scored a fourth in the second period to make it nine wins from their first 12 league matches.
© PA Photos
Burton Albion also remain in the playoff picture despite drawing 1-1 with Bristol Rovers. Meanwhile, Southend United and Torquay United scored three apiece as they recorded wins over Rotherham United and Accrington Stanley respectively.
League Two results: AFC Wimbledon 1-2 Cheltenham Town, Barnet 1-4 Plymouth Argyle, Bradford 1-1 York, Burton Albion 1-1 Bristol Rovers, Chesterfield 1-2 Dagenham & Redbridge, Fleetwood Town 0-1 Wycombe Wanderers, Gillingham 4-0 Aldershot, Northampton Town 3-0 Exeter, Rochdale 1-2 Morecambe, Rotherham 0-3 Southend, Torquay 3-1 Accrington