From Heathrow Terminal 1 train to Paddington (H&C Line)-Underground, Tube to London Liverpool St, train to Ipswich, then train to Felixstowe. 2hrs 34min £47. From Heathrow Terminals 1-2-3 Underground Station Tube to South Kensington Underground Station, Tube to Embankment, line 481 bus to Old Cattle Market Bus Station, then bus to Felixstowe, NatWest Bank. 4hrs 26min £22. From Heathrow Central Bus Station line 250 bus to Colchester Town Centre, Stanwell Street (Colch Bus Stn), line 93 bus to Old Cattle Market Bus Station, then bus to Felixstowe, NatWest Bank. 5hrs 45min £25. From London Heathrow drive to Felixstowe. 2hrs 27min £23.