How far is Roswell, GA from Decatur, IL?
The driving distance from Roswell, GA to Decatur, IL is about 591.6 miles (952.1 km), with a travel time of about 11h 10m by car.
- The straight-line flight distance is about 475.1 miles (764.6 km).
- For a round trip, plan for roughly 22h 21m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 7:30 AM EDT.
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 10m.
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
Driving Route Map
The map below follows the saved road route between Roswell and Decatur.
Turn-by-Turn Driving Directions
Step-by-step road directions between Roswell and Decatur.
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1
Start on North Atlanta Street
3155 ft · 1 min · North Atlanta Street
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2
Turn right onto Marietta Highway
2 mi · 3 min · Marietta Highway
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3
Continue on Roswell Road
7.1 mi · 13 min · Roswell Road
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4
Continue straight
1613 ft · 20 sec
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5
Continue on North Marietta Parkway
1.2 mi · 2 min · North Marietta Parkway
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6
Take the exit slight right toward I 75 North: Chattanooga
2372 ft · 33 sec
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7
Merge slight left onto Larry McDonald Memorial Highway
2.7 mi · 3 min · Larry McDonald Memorial Highway
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8
Keep slight left to continue on Larry McDonald Memorial Highway
87.8 mi · 1 hr 35 min · Larry McDonald Memorial Highway
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9
Take the exit slight right toward I 24 West: Chattanooga, Nashville
1.2 km · 1 min
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10
Continue on Chattanooga, Nashville
134.5 mi · 2 hr 32 min
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11
Keep slight left to continue on I 24West, I 40 West: Nashville
2.2 mi · 3 min
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12
Keep slight right to continue on I 24 West: Clarksville, Louisville
1725 ft · 28 sec
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13
Merge slight left onto Downtown Loop
2.3 mi · 3 min · Downtown Loop
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14
Continue on I 24 West, I 65 North: Clarksville, Louisville
2.1 mi · 3 min
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15
Take the exit slight left toward I 24 West: Clarksville
112.7 mi · 2 hr 1 min
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16
Keep slight right
63.4 mi · 1 hr 10 min
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17
Keep slight left to continue on I 57 North: Chicago
1935 ft · 47 sec
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18
Merge slight left onto Ken Gray Expressway
51.7 mi · 56 min · Ken Gray Expressway
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19
Keep slight right to continue on Ken Gray Expressway
20.5 mi · 22 min · Ken Gray Expressway
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20
Take the exit slight right toward US 50: Salem, Sandoval
2199 ft · 54 sec
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21
Merge slight left onto West Main Street
2.4 mi · 3 min · West Main Street
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22
Continue on East Poplar Street
2.7 mi · 3 min · East Poplar Street
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23
Continue on Poplar
2.7 mi · 3 min · Poplar
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24
Turn right onto 150E
10.4 mi · 12 min · 150E
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25
Continue on 300E
13.5 mi · 15 min · 300E
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26
Turn left
2405 ft · 35 sec
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27
Turn right onto North Kennedy Boulevard
1.6 mi · 2 min · North Kennedy Boulevard
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28
Continue on County Road 875 East
11.1 mi · 13 min · County Road 875 East
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29
Continue on South Superior Street
15.1 mi · 17 min · South Superior Street
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30
Continue on County Road 2400 East
2 mi · 3 min · County Road 2400 East
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31
Continue on Fair Avenue
3070 ft · 2 min · Fair Avenue
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32
Continue on South Poplar Street
2138 ft · 32 sec · South Poplar Street
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33
Turn right onto East 1st Street
2150 ft · 1 min · East 1st Street
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34
Turn left onto Cedar Street
116 m · 5 sec · Cedar Street
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35
Turn right onto Jackson Street
2709 ft · 2 min · Jackson Street
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36
Continue on North 2600 East Road
1.6 km · 2 min · North 2600 East Road
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37
Turn left
28.7 mi · 33 min
-
38
Take the exit slight right toward Decatur
2582 ft · 1 min
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39
Keep slight right to continue on Decatur
44 m · 4 sec
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40
Turn straight onto South Business Route 51
2.6 mi · 4 min · South Business Route 51
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41
Continue on South Main Street
769 ft · 19 sec · South Main Street
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42
Continue on South Franklin Street
1.2 mi · 2 min · South Franklin Street
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43
Turn left onto East Wood Street
155 m · 16 sec · East Wood Street
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44
Arrive at your destination
0 m · 1 sec · East Wood Street
Car Route Details
A richer read on the saved driving route between Roswell and Decatur.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
Chattanooga
Continue on Chattanooga, Nashville
134 mi · 02h 32m
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.
Sunny leaving Roswell and Chance Showers And Thunderstorms near Decatur.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Roswell to Decatur?
The road trip is about 591.6 miles (952.1 km) and usually takes 11h 10m 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 295.2 miles from Roswell and 296.5 miles from Decatur.
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 116.5 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 EDT. 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 $79.41 one way or $158.82 round trip. Estimated CO2 is about 185.5 kg one way.
Do you cross a time zone on this route?
Yes. There is about a 1 hour time difference between Roswell and Decatur, so arrival and return times should be read in local time.
What should you check before leaving?
Before you leave, expect Sunny around Roswell and Chance Showers And Thunderstorms near Decatur.
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 Roswell and Decatur. Straight-line distance: 475.12 mi (764.63 km).
#1 Roswell
A city in Fulton County, Georgia.
| Population | 95,434 |
| Coordinates | 34.0231600, -84.3615900 |
| Altitude | 328 |
| Country | United States |
#2 Decatur
The most populous city in Macon County, Illinois.
| Population | 70,007 |
| Coordinates | 39.8403100, -88.9548000 |
| Altitude | 205 |
| Country | United States |
End: Decatur (-88.9548, 39.84031)
Estimated Travel Time
Distance: 952 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 19h 42m |
| 40 mph (64.37 km/h) | 14h 47m |
| 50 mph (80.47 km/h) | 11h 49m |
| 60 mph (96.56 km/h) | 09h 51m |
| 70 mph (112.65 km/h) | 08h 27m |
| 80 mph (129 km/h) | 07h 22m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.81 | $79.41 | $158.82 |
| Mid-grade | $4.26 | $88.99 | $177.98 |
| Premium | $4.69 | $97.80 | $195.59 |
| Diesel | $5.73 | $119.50 | $239.00 |
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 Georgia · Oct 13, 2026