How far is Joliet, IL from Somerset, IL?
The driving distance from Joliet, IL to Somerset, IL is about 322 miles (518.2 km), with a travel time of about 06h 27m by car.
- The straight-line flight distance is about 268.2 miles (431.6 km).
- For a round trip, plan for roughly 12h 55m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 7:30 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 06h 27m.
Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
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 Illinois
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Sunny
Driving Route Map
The map below follows the saved road route between Joliet and Somerset.
Turn-by-Turn Driving Directions
Step-by-step road directions between Joliet and Somerset.
-
1
Start on the route
34 m · 10 sec
-
2
Turn right onto Ottawa Street
1397 ft · 44 sec · Ottawa Street
-
3
Continue on Ottawa Street
758 ft · 22 sec · Ottawa Street
-
4
Continue on Chicago Street
1 mi · 3 min · Chicago Street
-
5
Turn left onto Doris Avenue
686 ft · 15 sec · Doris Avenue
-
6
Turn right onto Gardner Street
1482 ft · 36 sec · Gardner Street
-
7
Continue on Manhattan Road
2.2 mi · 4 min · Manhattan Road
-
8
Continue on Manhattan Road
3.1 mi · 4 min · Manhattan Road
-
9
Continue on West North Street
2.3 mi · 4 min · West North Street
-
10
Continue on South State Street
1.9 mi · 3 min · South State Street
-
11
Continue on US Route 52
1.2 mi · 2 min · US Route 52
-
12
Continue on South Cedar Road
3.1 mi · 5 min · South Cedar Road
-
13
Continue on West Arsenal Road
1.9 mi · 3 min · West Arsenal Road
-
14
Continue on West Joliet Road
1.3 mi · 2 min · West Joliet Road
-
15
Turn right onto South La Grange Road
10.1 mi · 14 min · South La Grange Road
-
16
Turn left onto Bourbonnais Parkway
2017 ft · 40 sec · Bourbonnais Parkway
-
17
Take the ramp slight right toward I-57 South: Kankakee
2192 ft · 54 sec
-
18
Merge slight left
160.5 mi · 2 hr 52 min
-
19
Keep slight left to continue on I 57 South: Memphis
65.7 mi · 1 hr 11 min
-
20
Keep slight right to continue on Ken Gray Expressway
20 mi · 22 min · Ken Gray Expressway
-
21
Take the exit slight right toward IL 14: Christopher, Benton
1972 ft · 50 sec
-
22
Turn left onto West Main Street
1.4 km · 1 min · West Main Street
-
23
Enter the roundabout and take exit 2 toward Public Square
115 m · 8 sec · East Main Street
-
24
Exit the rotary onto East Main Street
31.6 mi · 48 min · East Main Street
-
25
Turn left
1 km · 51 sec
-
26
Turn right onto North Commercial Street
1.2 mi · 2 min · North Commercial Street
-
27
Turn left onto Highway 145
5.9 mi · 10 min · Highway 145
-
28
Turn left
2.8 mi · 4 min
-
29
Turn left onto Deneal Road
1.4 mi · 5 min · Deneal Road
-
30
Continue on Deneal Road
1.3 km · 3 min · Deneal Road
-
31
Continue on Deneal Road
1894 ft · 1 min · Deneal Road
-
32
Turn sharp right onto Somerset Road
35 m · 5 sec · Somerset Road
-
33
Arrive at your destination
0 m · 1 sec · Somerset Road
Car Route Details
A richer read on the saved driving route between Joliet and Somerset.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
I-57 South
Merge slight left
161 mi · 02h 52m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
Better with a longer stop
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
Mostly Sunny leaving Joliet and Sunny near Somerset.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Joliet to Somerset?
The road trip is about 322 miles (518.2 km) and usually takes 06h 27m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
What is the halfway point on this route?
Mattoon is a useful midpoint, sitting about 161.1 miles from Joliet and 160.9 miles from Somerset.
How much longer is the road route than the straight-line distance?
The direct path is about 268.2 miles (431.6 km), while the road route adds roughly 53.8 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 7:30 AM CDT. Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $42.84 one way or $85.68 round trip. Estimated CO2 is about 101 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Joliet and Sunny near Somerset.
Stop Ideas Near Mattoon
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 Mattoon.
Mattoon station
Effingham
Illinois Terminal
Rantoul
Flight Path Map
This map shows the direct air route between Joliet and Somerset. Straight-line distance: 268.18 mi (431.59 km).
#1 Joliet
The second most populous city in Will County, Illinois.
| Population | 85,583 |
| Coordinates | 41.5251900, -88.0834000 |
| Altitude | 165 |
| Country | United States |
#2 Somerset
Unincorporated community in Illinois
| Population | 3,955 |
| Coordinates | 37.6544900, -88.4572700 |
| Altitude | 139 |
| Country | United States |
End: Somerset (-88.45727, 37.65449)
Estimated Travel Time
Distance: 518 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 10h 43m |
| 40 mph (64.37 km/h) | 08h 02m |
| 50 mph (80.47 km/h) | 06h 26m |
| 60 mph (96.56 km/h) | 05h 21m |
| 70 mph (112.65 km/h) | 04h 35m |
| 80 mph (129 km/h) | 04h 01m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $42.84 | $85.68 |
| Mid-grade | $4.25 | $48.31 | $96.63 |
| Premium | $4.65 | $52.87 | $105.74 |
| Diesel | $5.30 | $60.25 | $120.51 |
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 · Apr 30, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.