Thameslink operates a train from Sutton to Brixton every 30 minutes. Tickets cost $8 - $12 and the journey takes 40 min. Southern also services this route 5 times a day. Alternatively, London Buses operates a bus from Sutton to Brixton every 5 minutes. Tickets cost $3 and the journey takes 22 min. London Buses also services this route every 20 minutes.
From Sutton (London) train to Loughborough Junction. 40 min £7. From Sutton Station The Quadrant line 164 bus to Morden then bus to Stockwell, Clapham Road Bedford Road. 49 min £2. From Sutton taxi to Brixton. 22 min £46. From Sutton drive to Brixton. 22 min £1. From Sutton Uber to Brixton. 22 min £25. From Sutton walk to Brixton. 3 h 20 min.