How far is St. Marys, GA from Dayton, OH?
The driving distance from St. Marys, GA to Dayton, OH is about 811.5 miles (1306 km), with a travel time of about 15h 18m by car.
- The straight-line flight distance is about 641.3 miles (1032.1 km).
- For a round trip, plan for roughly 30h 36m 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 18m.
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.
Mostly Sunny
Slight Chance Rain Showers then Mostly Cloudy
Driving Route Map
The map below follows the saved road route between St. Marys and Dayton.
Turn-by-Turn Driving Directions
Step-by-step road directions between St. Marys and Dayton.
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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 left
99.5 mi · 1 hr 47 min
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8
Take the exit slight right toward I 26 West: Columbia
1864 ft · 1 min
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9
Merge slight left
57.1 mi · 1 hr 2 min
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10
Take the exit slight right toward US 1 North: West Columbia
1062 ft · 26 sec
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11
Merge slight left onto Augusta Road
2930 ft · 42 sec · Augusta Road
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12
Turn straight onto Jarvis Klapman Boulevard
2.7 mi · 3 min · Jarvis Klapman Boulevard
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13
Continue on Hampton Street
1.4 mi · 3 min · Hampton Street
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14
Turn left onto Bull Street
1.3 mi · 2 min · Bull Street
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15
Continue on I. DeQuincey Newman Freeway
7.6 mi · 9 min · I. DeQuincey Newman Freeway
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16
Merge slight left onto Charles F Bolden Freeway
71.9 mi · 1 hr 20 min · Charles F Bolden Freeway
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17
Continue on General Paul R Younts Expressway
5.9 mi · 8 min · General Paul R Younts Expressway
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18
Continue on Bill Lee Freeway
2.9 mi · 4 min · Bill Lee Freeway
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19
Continue on I-77 North
1.6 km · 1 min · I-77 North
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20
Continue on Bill Lee Freeway
886 ft · 14 sec · Bill Lee Freeway
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21
Continue on I-77 North
1.5 mi · 2 min · I-77 North
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22
Keep slight right to continue on I-77 North
3.5 mi · 5 min · I-77 North
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23
Keep slight right to continue on I-77 North
2.7 mi · 3 min · I-77 North
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24
Keep slight right to continue on I-77 North
2.6 mi · 3 min · I-77 North
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25
Continue on I 77 North
1.4 mi · 2 min · I 77 North
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26
Keep slight right to continue on I 77 North
2.7 mi · 3 min · I 77 North
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27
Keep slight right to continue on I 77 North
2 mi · 2 min · I 77 North
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28
Continue on I-77 North
2.6 mi · 3 min · I-77 North
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29
Keep slight right to continue on I-77 North
54.4 mi · 1 hr 1 min · I-77 North
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30
Keep slight right to continue on Charles M Shelton Highway
61.8 mi · 1 hr 9 min · Charles M Shelton Highway
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31
Continue straight
1.3 mi · 1 min
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32
Keep slight right to continue on I 77 North: Bluefield, Charleston W. Va.
127.1 mi · 2 hr 25 min
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33
Keep slight left to continue on I 64 West: Huntington
17.8 mi · 20 min
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34
Take the exit slight right toward US 35: Winfield, Point Pleasant
2419 ft · 59 sec
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35
Keep slight left to continue on Scott Depot
674 ft · 21 sec
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36
Turn right onto Fruth-Lanham Highway
96.3 mi · 1 hr 52 min · Fruth-Lanham Highway
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37
Keep slight left to continue on US 35 West: Dayton
76.3 mi · 1 hr 26 min
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38
Take the exit slight right toward SR 48: Main Street, Jefferson Street
3027 ft · 1 min
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39
Keep slight right to continue on Jefferson Street, Day Air Ballpark, Patterson boulevard
98 m · 8 sec
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40
Turn slight right onto South Jefferson Street
1801 ft · 45 sec · South Jefferson Street
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41
Turn left onto East 4th Street
157 m · 14 sec · East 4th Street
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42
Turn right onto South Main Street
92 m · 8 sec · South Main Street
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43
Arrive at your destination
0 m · 1 sec · South Main Street
Car Route Details
A richer read on the saved driving route between St. Marys and Dayton.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
I 77 North
Keep slight right to continue on I 77 North: Bluefield, Charleston W. Va.
127 mi · 02h 25m
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.
Mostly Sunny leaving St. Marys and Slight Chance Rain Showers then Mostly Cloudy near Dayton.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from St. Marys to Dayton?
The road trip is about 811.5 miles (1306 km) and usually takes 15h 18m 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 403.6 miles from St. Marys and 407.9 miles from Dayton.
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 170.2 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 $108.40 one way or $216.80 round trip. Estimated CO2 is about 254.5 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around St. Marys and Slight Chance Rain Showers then Mostly Cloudy near Dayton.
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 St. Marys and Dayton. Straight-line distance: 641.32 mi (1032.11 km).
#1 St. Marys
City in Camden County, Georgia, USA
| Population | 17,968 |
| Coordinates | 30.7305100, -81.5464900 |
| Altitude | 3 |
| Country | United States |
#2 Dayton
The ninth most populous city in Ohio.
| Population | 139,907 |
| Coordinates | 39.7589500, -84.1916100 |
| Altitude | 225 |
| Country | United States |
End: Dayton (-84.19161, 39.75895)
Estimated Travel Time
Distance: 1306 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 27h 02m |
| 40 mph (64.37 km/h) | 20h 17m |
| 50 mph (80.47 km/h) | 16h 13m |
| 60 mph (96.56 km/h) | 13h 31m |
| 70 mph (112.65 km/h) | 11h 35m |
| 80 mph (129 km/h) | 10h 07m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.79 | $108.40 | $216.80 |
| Mid-grade | $4.27 | $122.26 | $244.53 |
| Premium | $4.70 | $134.61 | $269.22 |
| Diesel | $5.75 | $164.54 | $329.07 |
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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