How far is Decatur, IL from Roswell, GA?
The driving distance from Decatur, IL to Roswell, GA is about 589.8 miles (949.2 km), with a travel time of about 11h 06m by car.
- The straight-line flight distance is about 475.1 miles (764.6 km).
- For a round trip, plan for roughly 22h 13m 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 11h 06m.
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 Kentucky, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Chance Showers And Thunderstorms
Sunny
Driving Route Map
The map below follows the saved road route between Decatur and Roswell.
Turn-by-Turn Driving Directions
Step-by-step road directions between Decatur and Roswell.
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1
Start on East Wood Street
91 m · 16 sec · East Wood Street
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2
Turn left onto South Main Street
1.4 mi · 2 min · South Main Street
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3
Continue on South Business Route 51
3.8 mi · 6 min · South Business Route 51
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4
Take the ramp straight toward South Business Route 51
19.6 mi · 24 min · South Business Route 51
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5
Continue on North 2600 East Rd
7.9 mi · 9 min · North 2600 East Rd
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6
Turn right onto North 2600 East Road
1.6 km · 2 min · North 2600 East Road
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7
Continue on Jackson Street
2668 ft · 2 min · Jackson Street
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8
Turn left onto Cedar Street
142 m · 8 sec · Cedar Street
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9
Turn right onto East 1st Street
2150 ft · 1 min · East 1st Street
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10
Turn left onto South Poplar Street
2138 ft · 30 sec · South Poplar Street
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11
Turn straight onto Fair Avenue
3070 ft · 2 min · Fair Avenue
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12
Continue on County Road 2400 E
2 mi · 3 min · County Road 2400 E
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13
Continue on 300 East Road
15.1 mi · 17 min · 300 East Road
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14
Continue on County Road 875 East
11.1 mi · 13 min · County Road 875 East
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15
Continue on North Kennedy Boulevard
1.5 mi · 2 min · North Kennedy Boulevard
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16
Turn left onto West Gallatin Street
2405 ft · 34 sec · West Gallatin Street
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17
Turn right
554 ft · 7 sec
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18
Continue on United States Highway 51
13.4 mi · 15 min · United States Highway 51
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19
Continue on 250E
10.4 mi · 12 min · 250E
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20
Turn left
7.6 mi · 9 min
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21
Take the exit left
1847 ft · 45 sec
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22
Merge slight left
24.5 mi · 27 min
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23
Keep slight right to continue on Ken Gray Expressway
47.2 mi · 51 min · Ken Gray Expressway
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24
Take the exit slight right toward I 24 East: Nashville
1.4 mi · 1 min
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25
Continue straight
175.1 mi · 3 hr 8 min
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26
Keep slight right to continue on I 24 East, I 65 South: Nashville
2.3 mi · 3 min
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27
Continue on I 24 East: Chattanooga, Knoxville
2.8 mi · 4 min
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28
Keep slight left to continue on I 40 East, I 24 East: Knoxville, Chattanooga
2.1 mi · 3 min
-
29
Take the exit slight right toward I 24 East: Chattanooga
133.7 mi · 2 hr 30 min
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30
Keep slight right to continue on I 75 South: Atlanta
2869 ft · 49 sec
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31
Merge slight left
90.7 mi · 1 hr 38 min
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32
Take the exit slight right toward GA 120 Alternate: Marietta, Roswell
1531 ft · 26 sec
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33
Merge slight right onto North Marietta Parkway
1.3 mi · 2 min · North Marietta Parkway
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34
Take the exit slight right toward GA 3 Connector West, GA 120 East: Roswell, Marietta
1854 ft · 35 sec
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35
At the end of the road, turn straight onto Roswell Road
7.2 mi · 13 min · Roswell Road
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36
Continue on Marietta Highway
2 mi · 4 min · Marietta Highway
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37
Turn left onto North Atlanta Street
2899 ft · 1 min · North Atlanta Street
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38
Keep slight left to continue on North Atlanta Street
120 m · 10 sec · North Atlanta Street
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39
Arrive at your destination
0 m · 1 sec · North Atlanta Street
Car Route Details
A richer read on the saved driving route between Decatur and Roswell.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
I 24 East
Continue straight
175 mi · 03h 08m
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.
Chance Showers And Thunderstorms leaving Decatur and Sunny near Roswell.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Decatur to Roswell?
The road trip is about 589.8 miles (949.2 km) and usually takes 11h 06m 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?
Oak Grove is a useful midpoint, sitting about 294.3 miles from Decatur and 295.5 miles from Roswell.
How much longer is the road route than the straight-line distance?
The direct path is about 475.1 miles (764.6 km), while the road route adds roughly 114.7 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 $97.74 one way or $195.49 round trip. Estimated CO2 is about 184.9 kg one way.
Do you cross a time zone on this route?
Yes. There is about a 1 hour time difference between Decatur and Roswell, so arrival and return times should be read in local time.
What should you check before leaving?
Before you leave, expect Chance Showers And Thunderstorms around Decatur and Sunny near Roswell.
Stop Ideas Near Oak Grove
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 Oak Grove.
Clarksville, TN
Madisonville, KY
Nashville, TN
Paducah, KY
Flight Path Map
This map shows the direct air route between Decatur and Roswell. Straight-line distance: 475.12 mi (764.63 km).
#1 Decatur
The most populous city in Macon County, Illinois.
| Population | 70,007 |
| Coordinates | 39.8403100, -88.9548000 |
| Altitude | 205 |
| Country | United States |
#2 Roswell
A city in Fulton County, Georgia.
| Population | 95,434 |
| Coordinates | 34.0231600, -84.3615900 |
| Altitude | 328 |
| Country | United States |
End: Roswell (-84.36159, 34.02316)
Estimated Travel Time
Distance: 949 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 19h 39m |
| 40 mph (64.37 km/h) | 14h 44m |
| 50 mph (80.47 km/h) | 11h 47m |
| 60 mph (96.56 km/h) | 09h 49m |
| 70 mph (112.65 km/h) | 08h 25m |
| 80 mph (129 km/h) | 07h 21m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.70 | $97.74 | $195.49 |
| Mid-grade | $5.32 | $110.73 | $221.46 |
| Premium | $5.87 | $122.09 | $244.18 |
| Diesel | $6.58 | $136.89 | $273.78 |
Assumes 8.3 L/100 km (about 28.3 MPG). CO2 is an estimate and varies by vehicle, fuel blend, traffic, and terrain.
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