Great Western Railway operates a train from Oxford to Chippenham hourly. Tickets cost $23 - $45 and the journey takes 30 min. Alternatively, National Express operates a bus from Oxford to Chippenham once daily. Tickets cost $8 - $13 and the journey takes 1 h 30 min.
From Oxford train to Didcot Parkway then train to Chippenham. 1 h 18 min £25. From Oxford bus to Chippenham. 1 h 30 min £8. From Oxford City Centre, Frideswide Square (Oxford Rail Station) bus to Swindon, Bus Station then line 55 bus to Chippenham, Railway Station. 2 h 51 min £9. From Oxford drive to Chippenham. 1 h 4 min £10.