How far is Rockford, IL from Sullivan, IL?
The driving distance from Rockford, IL to Sullivan, IL is about 207.5 miles (333.9 km), with a travel time of about 04h 07m by car.
- The straight-line flight distance is about 186.3 miles (299.9 km).
- For a round trip, plan for roughly 08h 14m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM CDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
Flight Distance
Driving Distance
Gas Cost Calculator
Leave and Arrive Planner
Pick a departure time to see your estimated arrival and same-day return window.
Drive time stays fixed at 04h 07m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
You are leaving earlier than the recommended window, which gives you extra margin for breaks and traffic.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
City in Woodford County, Illinois, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Chance Rain
Chance Rain Showers
Driving Route Map
The map below follows the saved road route between Rockford and Sullivan.
Turn-by-Turn Driving Directions
Step-by-step road directions between Rockford and Sullivan.
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1
Start on West State Street
546 ft · 23 sec · West State Street
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2
Turn left onto South Church Street
1519 ft · 37 sec · South Church Street
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3
Turn left onto Cedar Street
84 m · 5 sec · Cedar Street
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4
Turn right onto South Main Street
3.6 mi · 6 min · South Main Street
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5
Take the ramp left
1707 ft · 44 sec
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6
Merge slight left onto U.S. Grant Memorial Highway
4.3 mi · 5 min · U.S. Grant Memorial Highway
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7
Take the exit slight right
1.2 km · 2 min
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8
Merge slight right
118.2 mi · 2 hr 7 min
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9
Keep slight right to continue on I 55 South, US 51 South: Peoria, Champaign, Saint Louis, Decatur
7.6 mi · 8 min
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10
Keep slight left to continue on I 74 East, US 51 South, US 55 Business North: Indianapolis, Decatur
2.1 mi · 2 min
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11
Take the exit slight right toward US 51 South, US 51 Business North: Decatur, Bloomington
1616 ft · 40 sec
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12
Continue on North 1450 East Road
14.7 mi · 18 min · North 1450 East Road
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13
Continue on North Walnut Street
23.2 mi · 30 min · North Walnut Street
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14
Turn straight
4.3 mi · 7 min
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15
Turn left onto West Eldorado Street
1.4 mi · 2 min · West Eldorado Street
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16
Turn slight right
3.3 mi · 5 min
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17
Continue on South Mount Zion Road
2.1 mi · 3 min · South Mount Zion Road
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18
Continue on North State Route 121
20.9 mi · 30 min · North State Route 121
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19
Turn right onto North Hamilton Street
534 ft · 16 sec · North Hamilton Street
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20
Turn left onto West Harrison Street
134 m · 19 sec · West Harrison Street
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21
Arrive at your destination
0 m · 1 sec · West Harrison Street
Car Route Details
A richer read on the saved driving route between Rockford and Sullivan.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
U.S. Grant Memorial Highway
Merge slight right
118 mi · 02h 07m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Chance Rain leaving Rockford and Chance Rain Showers near Sullivan.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Rockford to Sullivan?
The road trip is about 207.5 miles (333.9 km) and usually takes 04h 07m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
Minonk is a useful midpoint, sitting about 103.8 miles from Rockford and 103.6 miles from Sullivan.
How much longer is the road route than the straight-line distance?
The direct path is about 186.3 miles (299.9 km), while the road route adds roughly 21.2 extra miles because roads do not follow the straight air line.
When is the best time to leave for this route?
A good departure window is usually 6:00 AM to 8:00 AM CDT. If you want a more comfortable same-day return, try to leave by 8:46 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $27.60 one way or $55.21 round trip. Estimated CO2 is about 65.1 kg one way.
What should you check before leaving?
Before you leave, expect Chance Rain around Rockford and Chance Rain Showers near Sullivan.
Stop Ideas Near Minonk
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Minonk.
Pontiac station
Uptown Station
Dwight station
Peoria, Illinois
Flight Path Map
This map shows the direct air route between Rockford and Sullivan. Straight-line distance: 186.33 mi (299.87 km).
#1 Rockford
The second most populous city in Illinois.
| Population | 144,835 |
| Coordinates | 42.2711300, -89.0940000 |
| Altitude | 218 |
| Country | United States |
#2 Sullivan
City in Illinois
| Population | 4,400 |
| Coordinates | 39.5994800, -88.6078400 |
| Altitude | 205 |
| Country | United States |
End: Sullivan (-88.60784, 39.59948)
Estimated Travel Time
Distance: 334 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 06h 54m |
| 40 mph (64.37 km/h) | 05h 11m |
| 50 mph (80.47 km/h) | 04h 08m |
| 60 mph (96.56 km/h) | 03h 27m |
| 70 mph (112.65 km/h) | 02h 57m |
| 80 mph (129 km/h) | 02h 35m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $27.60 | $55.21 |
| Mid-grade | $4.25 | $31.13 | $62.26 |
| Premium | $4.65 | $34.07 | $68.13 |
| Diesel | $5.30 | $38.83 | $77.65 |
Assumes 8.3 L/100 km (about 28.3 MPG). CO2 is an estimate and varies by vehicle, fuel blend, traffic, and terrain.
Prices in Illinois · May 13, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.