Distance between cities › USA › Connecticut › Cornwall, CT › Distance from Cornwall to Markham Book Hotels

Distance from Cornwall, CT to Markham, IL

Distance

839 mi

Time

15 hours 56 mins

Gas Cost

$78 - $152

There are 740.21 miles from Cornwall to Markham in west direction and 839 miles (1,350.24 kilometers) by car, following the I-80 route.

Cornwall and Markham are 15 hours 56 mins far apart, if you drive non-stop .

This is the fastest route from Cornwall, CT to Markham, IL.

Please note the time difference between Cornwall, CT and Markham, IL is 1 hour. The current time in Cornwall is 8:14 pm and the current time in Markham is 7:14 pm.

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Lowest Price Rental Cars in Cornwall, CT

Planning on renting a car to go from Cornwall, CT to Markham, IL? Here there are some offers to rent a car in Cornwall, CT

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Cornwall »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 33.71 gallons of gas to cover the route between Cornwall, CT and Markham, IL.

The estimated cost of gas to go from Cornwall to Markham is $109.98.

During the route, an average car will release 660.53 pounds of CO₂ to the atmosphere. The carbon footprint would be 0.79 pounds of CO₂ per mile.

Average USA gas price used for calculation is $3.26 per gallon of regular gas. Price last updated on March 12, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Cornwall, CT and Markham, IL

If you want to meet halfway between Cornwall, CT and Markham, IL or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 41.185512 and -80.264415, or 41º 11' 7.8432" N, 80º 15' 51.894" W. This location is 419.74 miles away from Cornwall, CT and Markham, IL and it would take approximately 7 hours 58 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Mercer, PA, situated 428 miles from Cornwall, CT and 416 miles from Markham, IL. It would take 8 hours 23 mins to go from Cornwall to Mercer and 7 hours 41 mins to go from Markham to Mercer.