How far is Saint Simon Mills, GA from Dunwoody, GA?
The driving distance from Saint Simon Mills, GA to Dunwoody, GA is about 326 miles (524.7 km), with a travel time of about 06h 06m by car.
- The straight-line flight distance is about 256.6 miles (412.9 km).
- For a round trip, plan for roughly 12h 13m 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 06h 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 Treutlen County, Georgia, United States of America
Route Weather Snapshot
Check the forecast at both ends before you head out.
Partly Sunny
Chance Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between Saint Simon Mills and Dunwoody.
Turn-by-Turn Driving Directions
Step-by-step road directions between Saint Simon Mills and Dunwoody.
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1
Start on Arthur J. Moore Drive
115 m · 19 sec · Arthur J. Moore Drive
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2
Turn left onto Hamilton Road
1085 ft · 49 sec · Hamilton Road
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3
At the end of the road, turn right onto Sea Island Road
157 m · 13 sec · Sea Island Road
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4
Turn straight
992 ft · 27 sec
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5
Keep slight right
1046 ft · 20 sec
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6
Continue on F. J. Torras Causeway
2.1 mi · 3 min · F. J. Torras Causeway
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7
Continue on Fernando Joseph Torras Causeway
2 mi · 3 min · Fernando Joseph Torras Causeway
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8
Turn right onto Glynn Avenue
1.6 mi · 3 min · Glynn Avenue
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9
Continue on Golden Isles Parkway
4.3 mi · 7 min · Golden Isles Parkway
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10
Take the exit slight right toward I 95 North: I 95 North
2923 ft · 1 min
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11
Merge slight left
60 mi · 1 hr 5 min
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12
Keep slight right
3075 ft · 48 sec
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13
Take the exit slight right toward I 16 West: Macon
1192 ft · 51 sec
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14
Merge slight left onto Jim Gillis Historic Savannah Parkway
155.9 mi · 2 hr 47 min · Jim Gillis Historic Savannah Parkway
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15
Continue on Fall Line Freeway
2560 ft · 40 sec · Fall Line Freeway
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16
Keep slight right to continue on I 75 North: Atlanta
2746 ft · 43 sec
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17
Merge slight left
62.1 mi · 1 hr 7 min
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18
Keep slight right to continue on Terrell Starr Parkway
10.1 mi · 12 min · Terrell Starr Parkway
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19
Keep slight right to continue on I 285 East: Augusta, Greenville
1 km · 1 min
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20
Merge slight left onto Atlanta Bypass / The Perimeter
21 mi · 24 min · Atlanta Bypass / The Perimeter
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21
Take the exit slight right toward North Peachtree Road, North Shallowford Road, Chamblee-Dunwoody Road
1509 ft · 39 sec
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22
Continue on Cotillion Drive
2585 ft · 1 min · Cotillion Drive
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23
Turn right onto North Shallowford Road
1.3 km · 2 min · North Shallowford Road
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24
Continue on Chamblee Dunwoody Way
123 m · 11 sec · Chamblee Dunwoody Way
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25
Continue on Chamblee Dunwoody Road
1.5 mi · 3 min · Chamblee Dunwoody Road
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26
Turn left
28 m · 3 sec
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27
Turn right
24 m · 6 sec
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28
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Saint Simon Mills and Dunwoody.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
Jim Gillis Historic Savannah Parkway
Merge slight left onto Jim Gillis Historic Savannah Parkway
156 mi · 02h 47m
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.
Partly Sunny leaving Saint Simon Mills and Chance Showers And Thunderstorms near Dunwoody.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Saint Simon Mills to Dunwoody?
The road trip is about 326 miles (524.7 km) and usually takes 06h 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?
Soperton is a useful midpoint, sitting about 163 miles from Saint Simon Mills and 163 miles from Dunwoody.
How much longer is the road route than the straight-line distance?
The direct path is about 256.6 miles (412.9 km), while the road route adds roughly 69.4 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 $45.55 one way or $91.10 round trip. Estimated CO2 is about 102.2 kg one way.
What should you check before leaving?
Before you leave, expect Partly Sunny around Saint Simon Mills and Chance Showers And Thunderstorms near Dunwoody.
Stop Ideas Near Soperton
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 Soperton.
Jesup
Flight Path Map
This map shows the direct air route between Saint Simon Mills and Dunwoody. Straight-line distance: 256.55 mi (412.88 km).
#1 Saint Simon Mills
City in Glynn County, Georgia, United States of America
| Population | 13,915 |
| Coordinates | 31.1707900, -81.4073200 |
| Altitude | 3 |
| Country | United States |
#2 Dunwoody
Town in DeKalb County, Georgia, USA
| Population | 49,326 |
| Coordinates | 33.9462100, -84.3346500 |
| Altitude | 345 |
| Country | United States |
End: Dunwoody (-84.33465, 33.94621)
Estimated Travel Time
Distance: 525 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 10h 51m |
| 40 mph (64.37 km/h) | 08h 09m |
| 50 mph (80.47 km/h) | 06h 31m |
| 60 mph (96.56 km/h) | 05h 26m |
| 70 mph (112.65 km/h) | 04h 39m |
| 80 mph (129 km/h) | 04h 04m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.96 | $45.55 | $91.10 |
| Mid-grade | $4.43 | $50.93 | $101.87 |
| Premium | $4.78 | $54.95 | $109.89 |
| Diesel | $5.62 | $64.68 | $129.35 |
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 · Apr 19, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.