How far is Dunwoody, GA from St. Marys, GA?
The driving distance from Dunwoody, GA to St. Marys, GA is about 358 miles (576.2 km), with a travel time of about 06h 38m by car.
- The straight-line flight distance is about 275.4 miles (443.2 km).
- For a round trip, plan for roughly 13h 17m 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 38m.
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.
Human settlement in Emanuel County, Georgia, United States of America
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Driving Route Map
The map below follows the saved road route between Dunwoody and St. Marys.
Turn-by-Turn Driving Directions
Step-by-step road directions between Dunwoody and St. Marys.
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1
Start on the route
36 m · 10 sec
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2
Turn right onto Chamblee Dunwoody Road
1.6 mi · 3 min · Chamblee Dunwoody Road
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3
Continue on Chamblee Dunwoody Way
668 ft · 20 sec · Chamblee Dunwoody Way
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4
Continue on North Shallowford Road
1.4 km · 2 min · North Shallowford Road
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5
Turn left onto Savoy Drive
2451 ft · 1 min · Savoy Drive
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6
Take the ramp straight toward I 285 East
1782 ft · 43 sec
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7
Merge slight left onto Atlanta Bypass / The Perimeter
20.9 mi · 24 min · Atlanta Bypass / The Perimeter
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8
Take the exit slight right toward I 675 South: Macon
1.1 mi · 2 min
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9
Continue on Terrell Starr Parkway
10.2 mi · 12 min · Terrell Starr Parkway
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10
Merge slight left
49.3 mi · 53 min
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11
Keep slight left to continue on Macon, Savannah
12.3 mi · 13 min
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12
Take the exit slight right toward I 16 East: Jim Gillis Highway, Savannah
1.1 mi · 1 min
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13
Continue straight
155.9 mi · 2 hr 48 min
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14
Take the exit slight right toward I 95 South: Brunswick, Jacksonville
2418 ft · 32 sec
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15
Merge slight left
94.5 mi · 1 hr 42 min
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16
Take the exit slight right toward GA 40: Kingsland, St Marys
1675 ft · 43 sec
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17
Turn left onto East King Avenue
2.5 mi · 4 min · East King Avenue
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18
Continue on Kingsland Saint Marys Road
3 mi · 5 min · Kingsland Saint Marys Road
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19
Continue on Osborne Road
3 mi · 5 min · Osborne Road
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20
Turn right onto West Hall Street
24 m · 3 sec · West Hall Street
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21
Arrive at your destination
0 m · 1 sec · West Hall Street
Car Route Details
A richer read on the saved driving route between Dunwoody and St. Marys.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
I 16 East
Continue straight
156 mi · 02h 48m
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 Dunwoody and Sunny near St. Marys.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Dunwoody to St. Marys?
The road trip is about 358 miles (576.2 km) and usually takes 06h 38m 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?
Nunez is a useful midpoint, sitting about 179.1 miles from Dunwoody and 179 miles from St. Marys.
How much longer is the road route than the straight-line distance?
The direct path is about 275.4 miles (443.2 km), while the road route adds roughly 82.6 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 $50.03 one way or $100.05 round trip. Estimated CO2 is about 112.2 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Dunwoody and Sunny near St. Marys.
Stop Ideas Near Nunez
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 Nunez.
Jesup
Flight Path Map
This map shows the direct air route between Dunwoody and St. Marys. Straight-line distance: 275.39 mi (443.2 km).
#1 Dunwoody
Town in DeKalb County, Georgia, USA
| Population | 49,326 |
| Coordinates | 33.9462100, -84.3346500 |
| Altitude | 345 |
| Country | United States |
#2 St. Marys
City in Camden County, Georgia, USA
| Population | 17,968 |
| Coordinates | 30.7305100, -81.5464900 |
| Altitude | 3 |
| Country | United States |
End: St. Marys (-81.54649, 30.73051)
Estimated Travel Time
Distance: 576 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 11h 55m |
| 40 mph (64.37 km/h) | 08h 57m |
| 50 mph (80.47 km/h) | 07h 09m |
| 60 mph (96.56 km/h) | 05h 58m |
| 70 mph (112.65 km/h) | 05h 06m |
| 80 mph (129 km/h) | 04h 27m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.96 | $50.03 | $100.05 |
| Mid-grade | $4.43 | $55.94 | $111.88 |
| Premium | $4.78 | $60.35 | $120.69 |
| Diesel | $5.62 | $71.03 | $142.06 |
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 15, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.