Answer: The driving distance between Cincinnati, OH and Montreal, QC, Canada is approximately 820 miles. The driving time would be approximately 13 hours 15 minutes if you were to travel non-stop in good driving conditions. (The driving time does not take into consideration conditions which may extend trip time such as weather, road work, border crossings and rush hour traffic in urban areas.)
From Kansas City, MO to the Blue Water Bridge border x-ing @ PORT HURON, MI it is 850 miles taking this route:
Take I-35 NORTH (towards DES MOINES), from Kansas City, to I-80 EAST to DAVENPORT, at Des Moines, IOWA.
Continue on I-80 EAST to I-94 EAST to DETROIT, in northwestern INDIANA, outside of Chicago.
Continue on I-94 EAST to I-69 NORTH to LANSING off EXIT 108 in MICHIGAN.
Take I-69 NORTH (& EAST, past Lansing), to CANADA, via the BLUE WATER BRIDGE (toll), crossing from PORT HURON, MICHIGAN, U.S.A. into SARNIA (technically Point Edward), ONTARIO, CANADA.
From Sarnia, ON to Montréal, QC, it is 820 km (510 miles) taking this route:
From Sarnia, you will continue HIGHWAY 402 - EAST towards LONDON.
Take HIGHWAY 402 - EAST to HIGHWAY 401 - EAST to TORONTO, near London.
Take HIGHWAY 401 - EAST, thru Toronto, to QUÉBEC, where the highway will continue as AUTOROUTE 20 - EST.
Continue on AUTOROUTE 20 - EST to AUTOROUTE 40 - EST to MONTRÉAL off SORTIE [exit] 29, and then take AUTOROUTE 40 - EST to Montréal. Or, if you are going to Montréal CENTRE-VILLE (the city centre), stay on AUTOROUTE 20 - EST to Montréal.
Answer: 567 miles (912 kilometres) taking this route:
Take I-95 NORTH from BALTIMORE to the NJ TURNPIKE (green shield) to NJ-NY in DELAWARE; EXIT, then follow signs to NJ TURNPIKE NORTH to NEW YORK. Continue on the TURNPIKE (toll) NORTH to I-287 NORTH at EXIT 10.
Follow signs to I-287 NORTH to METUCHEN.
Take I-287 NORTH to I-87 New York State THRUWAY (toll) NORTH to ALBANY just as you enter into New York state.
Follow I-87 NORTH all the way up to CANADA. You will be crossing from CHAMPLAIN, NEW YORK, U.S.A. into SAINT-BERNARD-de-LACOLLE, QUÉBEC, CANADA.
Once you have crossed the border, continue NORTH on AUTOROUTE 15. Continue on AUTOROUTE 15 NORD to MONTRÉAL.