From Oxford train to Reading then train to Feltham. 1 h 33 min £25. From Oxford City Centre, Queens Lane (Stop K5) bus to Heathrow Airport Terminal 5, Heathrow Terminal 5 then line 490 bus to Feltham. 1 h 44 min £13. From Oxford taxi to Feltham. 58 min £208. From Oxford drive to Feltham. 58 min £9.
Great Western Railway operates a train from Oxford to Feltham every 30 minutes. Tickets cost $15 - $28 and the journey takes 22 min. South Western Railway also services this route every 30 minutes. Alternatively, Oxford Bus Company operates a bus from Oxford to Feltham every 15 minutes. Tickets cost $12 - $18 and the journey takes 1 h 14 min. London Buses also services this route every 5 minutes.