London Buses operates a bus from Uxbridge to Isleworth every 10 minutes. Tickets cost $3 and the journey takes 56 min.
How to get from Uxbridge to Isleworth
From Uxbridge, Belmont Road bus to Heathrow Terminals 1-2-3 Underground Station then Tube to Hounslow East Underground Station. 32 min £5. From Uxbridge Underground Station Tube to Acton Town Underground Station then Tube to Osterley Underground Station. 48 min £4. From Uxbridge, Hinton Road line 222 bus to Hounslow Bus Station. 56 min £2. From Uxbridge taxi to Isleworth. 16 min £42. From Uxbridge drive to Isleworth. 16 min £1.