How far is Dayton, OH from St. Marys, GA?
The driving distance from Dayton, OH to St. Marys, GA is about 812.4 miles (1307.4 km), with a travel time of about 15h 19m by car.
- The straight-line flight distance is about 641.3 miles (1032.1 km).
- For a round trip, plan for roughly 30h 39m 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 15h 19m.
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.
Town in north Carolina
Route Weather Snapshot
Check the forecast at both ends before you head out.
Slight Chance Rain Showers then Mostly Cloudy
Sunny
Driving Route Map
The map below follows the saved road route between Dayton and St. Marys.
Turn-by-Turn Driving Directions
Step-by-step road directions between Dayton and St. Marys.
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1
Start on South Main Street
92 m · 12 sec · South Main Street
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2
Turn right onto West 4th Street
156 m · 18 sec · West 4th Street
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3
Turn left onto South Ludlow Street
2095 ft · 41 sec · South Ludlow Street
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4
Take the ramp straight toward US 35 East: Xenia
2382 ft · 58 sec
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5
Merge slight left
33.9 mi · 42 min
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6
Keep slight left to continue on US 35 East: Washington Court House
44.7 mi · 49 min
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7
Keep slight left
58.6 mi · 1 hr 8 min
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8
Keep slight right
9.8 mi · 11 min
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9
Continue on US 35
14.3 mi · 16 min · US 35
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10
Continue on Fruth-Lanham Highway
11.8 mi · 14 min · Fruth-Lanham Highway
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11
Continue straight
119 m · 7 sec
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12
Take the ramp slight right
2603 ft · 1 min
-
13
Merge slight left
137.4 mi · 2 hr 36 min
-
14
Continue straight
16 mi · 18 min
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15
Keep slight right to continue on I 77 South: Charlotte North Carolina
37.1 mi · 43 min
-
16
Keep slight right to continue on Charles M Shelton Highway
66.4 mi · 1 hr 13 min · Charles M Shelton Highway
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17
Keep slight right
5.7 mi · 7 min
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18
Keep slight right to continue on I-77 South
2.5 mi · 3 min · I-77 South
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19
Continue on I 77 South
2.1 mi · 2 min · I 77 South
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20
Keep slight right to continue on I 77 South
2.3 mi · 3 min · I 77 South
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21
Continue on I-77 South
1990 ft · 26 sec · I-77 South
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22
Keep slight right to continue on I-77 South
4 mi · 5 min · I-77 South
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23
Keep slight right to continue on I-77 South
2.9 mi · 3 min · I-77 South
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24
Keep slight right to continue on I-77 South
5.5 mi · 8 min · I-77 South
-
25
Continue on Bill Lee Freeway
2.9 mi · 4 min · Bill Lee Freeway
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26
Continue on General Paul R Younts Expressway
6 mi · 8 min · General Paul R Younts Expressway
-
27
Continue on B. Bayles Mack Highway
47.7 mi · 54 min · B. Bayles Mack Highway
-
28
Continue straight
24.5 mi · 26 min
-
29
Keep slight left to continue on Charles F Bolden Freeway
3.3 mi · 4 min · Charles F Bolden Freeway
-
30
Continue on William Earle Berne Beltway
12.3 mi · 14 min · William Earle Berne Beltway
-
31
Continue on Veterans Memorial Freeway
2.8 mi · 3 min · Veterans Memorial Freeway
-
32
Keep slight left to continue on I 26 East: Charleston
1.3 km · 2 min
-
33
Merge slight right
51.9 mi · 56 min
-
34
Take the exit slight right toward I 95 South: Savannah
1.4 km · 2 min
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35
Merge slight left
193.4 mi · 3 hr 28 min
-
36
Take the exit slight right toward GA 40: Kingsland, St Marys
1675 ft · 43 sec
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37
Turn left onto East King Avenue
2.5 mi · 4 min · East King Avenue
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38
Continue on Kingsland Saint Marys Road
3 mi · 5 min · Kingsland Saint Marys Road
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39
Continue on Osborne Road
3 mi · 5 min · Osborne Road
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40
Turn right onto West Hall Street
24 m · 3 sec · West Hall Street
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41
Arrive at your destination
0 m · 1 sec · West Hall Street
Car Route Details
A richer read on the saved driving route between Dayton 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 95 South
Merge slight left
193 mi · 03h 28m
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.
Slight Chance Rain Showers then Mostly Cloudy leaving Dayton 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 Dayton to St. Marys?
The road trip is about 812.4 miles (1307.4 km) and usually takes 15h 19m 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?
Harmony is a useful midpoint, sitting about 404.1 miles from Dayton and 408.3 miles from St. Marys.
How much longer is the road route than the straight-line distance?
The direct path is about 641.3 miles (1032.1 km), while the road route adds roughly 171.1 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 $109.81 one way or $219.61 round trip. Estimated CO2 is about 254.8 kg one way.
What should you check before leaving?
Before you leave, expect Slight Chance Rain Showers then Mostly Cloudy around Dayton and Sunny near St. Marys.
Stop Ideas Near Harmony
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 Harmony.
Salisbury
Lexington
Winston-Salem, North Carolina
Winston-Salem State Univ, Winston-Salem, North Car
Flight Path Map
This map shows the direct air route between Dayton and St. Marys. Straight-line distance: 641.32 mi (1032.11 km).
#1 Dayton
The ninth most populous city in Ohio.
| Population | 139,907 |
| Coordinates | 39.7589500, -84.1916100 |
| Altitude | 225 |
| 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: 1307 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 27h 04m |
| 40 mph (64.37 km/h) | 20h 18m |
| 50 mph (80.47 km/h) | 16h 14m |
| 60 mph (96.56 km/h) | 13h 32m |
| 70 mph (112.65 km/h) | 11h 36m |
| 80 mph (129 km/h) | 10h 08m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.83 | $109.81 | $219.61 |
| Mid-grade | $4.38 | $125.66 | $251.32 |
| Premium | $4.93 | $141.26 | $282.51 |
| Diesel | $6.07 | $173.97 | $347.94 |
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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