Take HIGHWAY 402 WEST from London to the BRIDGE TO U.S.A. in SARNIA. Cross the BLUE WATER BRIDGE (toll) from Sarnia, Ontario, Canada into PORT HURON, Michigan, U.S.A. Once you have crossed, follow signs to I-69 WEST towards FLINT.
Follow I-69 WEST to I-75 NORTH to SAGINAW via I-475 NORTH (EXIT 137 off I-69) in Flint.