How far is St. Marys, GA from Alpharetta, GA?
The driving distance from St. Marys, GA to Alpharetta, GA is about 373.6 miles (601.2 km), with a travel time of about 05h 52m by car.
- The straight-line flight distance is about 281.2 miles (452.6 km).
- For a round trip, plan for roughly 11h 44m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 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 05h 52m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
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
Mostly Sunny
Driving Route Map
The map below follows the saved road route between St. Marys and Alpharetta.
Turn-by-Turn Driving Directions
Step-by-step road directions between St. Marys and Alpharetta.
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1
Start on West Hall Street
24 m · 9 sec · West Hall Street
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2
Turn left onto Osborne Street
3 mi · 5 min · Osborne Street
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3
Continue on Kingsland Saint Marys Road
3 mi · 5 min · Kingsland Saint Marys Road
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4
Continue on East King Avenue
2.2 mi · 3 min · East King Avenue
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5
Take the ramp slight right toward I 95 North: I 95 North
2798 ft · 1 min
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6
Merge slight left
94.3 mi · 1 hr 42 min
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7
Keep slight right
3075 ft · 48 sec
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8
Take the exit slight right toward I 16 West: Macon
1192 ft · 51 sec
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9
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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10
Continue on Fall Line Freeway
2560 ft · 40 sec · Fall Line Freeway
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11
Keep slight right to continue on I 75 North: Atlanta
2746 ft · 43 sec
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12
Merge slight left
62.1 mi · 1 hr 7 min
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13
Keep slight left to continue on I 75 North: Atlanta, Birmingham
22.8 mi · 28 min
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14
Keep slight left to continue on Northeast Expressway
2.7 mi · 4 min · Northeast Expressway
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15
Keep slight right to continue on T Harvey Mathis Parkway
7.1 mi · 9 min · T Harvey Mathis Parkway
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16
Continue on Turner McDonald Parkway
11 mi · 14 min · Turner McDonald Parkway
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17
Take the exit slight right toward Alpharetta, Haynes Bridge Road
1424 ft · 33 sec
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18
Turn left onto Haynes Bridge Road
1.3 mi · 2 min · Haynes Bridge Road
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19
Turn left onto Old Milton Parkway
869 ft · 21 sec · Old Milton Parkway
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20
Turn right onto South Main Street
1764 ft · 53 sec · South Main Street
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21
Turn right onto Academy Street
42 m · 4 sec · Academy Street
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22
Arrive at your destination
0 m · 1 sec · Academy Street
Car Route Details
A richer read on the saved driving route between St. Marys and Alpharetta.
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.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Partly Sunny leaving St. Marys and Mostly Sunny near Alpharetta.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from St. Marys to Alpharetta?
The road trip is about 373.6 miles (601.2 km) and usually takes 05h 52m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
Soperton is a useful midpoint, sitting about 184.3 miles from St. Marys and 189.3 miles from Alpharetta.
How much longer is the road route than the straight-line distance?
The direct path is about 281.2 miles (452.6 km), while the road route adds roughly 92.4 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 8:00 AM EDT. If you want a more comfortable same-day return, try to leave by 5:16 AM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $52.21 one way or $104.41 round trip. Estimated CO2 is about 117.1 kg one way.
What should you check before leaving?
Before you leave, expect Partly Sunny around St. Marys and Mostly Sunny near Alpharetta.
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 St. Marys and Alpharetta. Straight-line distance: 281.22 mi (452.58 km).
#1 St. Marys
City in Camden County, Georgia, USA
| Population | 17,968 |
| Coordinates | 30.7305100, -81.5464900 |
| Altitude | 3 |
| Country | United States |
#2 Alpharetta
The most populous city in Fulton County, Georgia.
| Population | 67,897 |
| Coordinates | 34.0753800, -84.2940900 |
| Altitude | 347 |
| Country | United States |
End: Academy Street (-84.29408, 34.075615)
Estimated Travel Time
Distance: 601 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 12h 26m |
| 40 mph (64.37 km/h) | 09h 20m |
| 50 mph (80.47 km/h) | 07h 28m |
| 60 mph (96.56 km/h) | 06h 13m |
| 70 mph (112.65 km/h) | 05h 20m |
| 80 mph (129 km/h) | 04h 39m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.96 | $52.21 | $104.41 |
| Mid-grade | $4.43 | $58.37 | $116.75 |
| Premium | $4.78 | $62.97 | $125.95 |
| Diesel | $5.62 | $74.12 | $148.25 |
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 23, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.