Boston to Chicago distance

Boston to Chicago by road

The fastest driving route is 991 miles (1,595 km) long and takes about 18 hr 45 min without stops or traffic. It runs mostly on I-80 (652 mi), I-84 (230 mi), and I-90 (69.1 mi).

It crosses 7 states: Massachusetts, Connecticut, New York, Pennsylvania, Ohio, Indiana, and Illinois. The longest stretch is in Pennsylvania, at 350 mi. That’s an average of 53 mph (85 km/h). AAA recommends a break every two hours or 100 miles: with 9 stops of 20 minutes, the trip takes about 21 hr 45 min. At about 8 hours behind the wheel a day, it’s a 3-day drive. The time is OSRM’s estimate with OpenStreetMap data: no traffic and speeds somewhat below the limits, so real trips can differ.

Straight-line distance and bearing

In a straight line, the shortest distance over the Earth’s surface, Boston and Chicago are 852 miles (1,371 km) apart. That’s the geodesic on the WGS84 ellipsoid, the distance “as the crow flies”.

The road is 16% longer: for every 100 miles in a straight line you drive 116. That’s a normal detour between two cities. Of the 110 US driving pairs in this series, it ranks 45th for detour (the average is 16%).

From Boston, Chicago lies to the west (bearing 273°), and from Chicago, Boston lies to the east. The straight line reaches Chicago on a bearing of 262°: on a sphere the bearing keeps changing along the way, which is why the shortest route looks slightly curved on a flat map.

Halfway between Boston and Chicago

Halfway along the straight line, 426 miles (686 km) from each city, is the point 42.4053° N, 79.3883° W. It falls near Cassadaga (New York, pop. 553), 5.7 mi away. The nearest town of 20,000 people or more is Welland (Ontario, Canada, pop. 52,293), 40.5 mi away.

By road, the halfway point is 496 miles (797 km) from each city, near Oklahoma (Pennsylvania, pop. 1,029), 11.2 mi away. The two midpoints are 89.8 mi apart: if you want to meet halfway, the one on the road is the useful one.

Time difference and flight

Chicago is 1 hour behind Boston all year (Central Time versus Eastern Time): when it’s 12:00 in Boston, it’s 11:00 in Chicago.

A direct flight would take about 2 hr 15 min. That’s an estimate: 30 minutes for takeoff, climb, descent and landing, plus the 1,371 km straight line at 800 km/h (about 497 mph), a typical airliner cruising speed. Real schedules depend on wind, routing and airports, and not every pair has a direct flight. Westbound flights usually take a little longer than eastbound ones because of high-altitude winds (the jet stream).

The two cities

Boston sits at 48 ft (15 m) and Chicago at 588 ft (179 m), 540 ft (165 m) higher.

Boston has 672,973 people and Chicago 2.7 million people (Census Bureau estimate for 2025).