From Slough train to London Paddington, walk to Lancaster Gate Underground Station, then Tube to Leytonstone Underground Station. 54 min £12. From Slough Town Centre, Wellington Street (Brunel Way) line 702 bus to Victoria Bus Station then bus to Walthamstow Central, Rochdale Road. 2 h 18 min £8. From Slough taxi to Leyton. 50 min £145. From Slough drive to Leyton. 50 min £6.
Bus from Slough to Leyton
Green Line (operated by First in Berkshire) operates a bus from Slough to Leyton every 30 minutes. Tickets cost $8 and the journey takes 1 h 12 min. London Buses also services this route every 30 minutes.