Great Western Railway operates a train from Reading to Southall every 30 minutes. Tickets cost $15 - $28 and the journey takes 40 min. Alternatively, RailAir operates a bus from Reading to Southall every 15 minutes. Tickets cost $11 and the journey takes 50 min. London Buses also services this route every 5 minutes.
From Reading train to Southall. 40 min £13. From Reading Town Centre, Reading RailAir (Adj Reading Station RailAir) bus to Heathrow Central Bus Station then line 105 bus to Southall Station. 1 h 27 min £9. From Reading taxi to Southall. 35 min £129. From Reading drive to Southall. 35 min £5.