How far is Dayton, OH from Harmony, OH?
The driving distance from Dayton, OH to Harmony, OH is about 33.4 miles (53.8 km), with a travel time of about 00h 40m by car.
- The straight-line flight distance is about 28.6 miles (46 km).
- For a round trip, plan for roughly 01h 21m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 7:00 AM to 7:00 PM EDT.
Reverse, save, or send this route
This is an easy same-day return drive. Copy the route link, send it to another device, or print a clean version before you head out.
This is an easy same-day return drive.
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 00h 40m.
This is a short drive, so your comfort window is wide. Traffic and current weather matter more than the clock.
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.
Census-designated place in Clark County, Ohio
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 Dayton and Harmony.
Turn-by-Turn Driving Directions
Step-by-step road directions between Dayton and Harmony.
-
1
Start on South Main Street
1.3 km · 2 min · South Main Street
-
2
Take the ramp right toward I 75 North, SR 4 North: Toledo, Springfield
43 m · 3 sec
-
3
Keep slight right to continue on SR 4 North: Springfield
1102 ft · 23 sec
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4
Merge slight left
10.4 mi · 13 min
-
5
Take the exit slight right toward US 70 East, SR 4 North: Columbus
5.8 mi · 7 min
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6
Keep slight left
15.1 mi · 16 min
-
7
Take the exit slight right toward US 40: Springfield
1976 ft · 56 sec
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8
Turn left onto East National Road
3060 ft · 1 min · East National Road
-
9
Turn left onto Center Street
113 m · 16 sec · Center Street
-
10
Arrive at your destination
0 m · 1 sec · Center Street
Car Route Details
A richer read on the saved driving route between Dayton and Harmony.
Turn-heavy local drive
The route has frequent decision points for its length, so lane choice and turn timing will matter more than cruising speed.
US 70 East
Keep slight left
15.1 mi · 00h 16m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A short regional drive
This route is short enough to handle as a quick errand, commute, or easy same-day return without much planning overhead.
Sunny leaving Dayton and Sunny near Harmony.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Dayton to Harmony?
The road trip is about 33.4 miles (53.8 km) and usually takes 00h 40m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is short enough to handle as a quick errand, commute, or easy same-day return without much planning overhead.
What is the halfway point on this route?
Green Meadows is a useful midpoint, sitting about 16.7 miles from Dayton and 16.7 miles from Harmony.
How much longer is the road route than the straight-line distance?
The direct path is about 28.6 miles (46 km), while the road route adds roughly 4.8 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 7:00 AM to 7:00 PM EDT. If you want a more comfortable same-day return, try to leave by 7:08 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $4.37 one way or $8.74 round trip. Estimated CO2 is about 10.5 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Dayton and Sunny near Harmony.
Stop Ideas Near Green Meadows
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Scene75 Entertainment Center | Dayton
Historic City Hall Bell
Springfield City Hall
Xenia City Hall
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Green Meadows.
Columbus, OH
Cincinnati, OH
Cincinnati Museum Center at Union Terminal
Connersville station
Flight Path Map
This map shows the direct air route between Dayton and Harmony. Straight-line distance: 28.57 mi (45.98 km).
#1 Dayton
The ninth most populous city in Ohio.
| Population | 139,907 |
| Coordinates | 39.7589500, -84.1916100 |
| Altitude | 225 |
| Country | United States |
#2 Harmony
Human settlement in United States of America
| Population | 2,649 |
| Coordinates | 39.9228400, -83.6971500 |
| Altitude | 325 |
| Country | United States |
End: Harmony (-83.69715, 39.92284)
Estimated Travel Time
Distance: 54 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 06m |
| 40 mph (64.37 km/h) | 00h 50m |
| 50 mph (80.47 km/h) | 00h 40m |
| 60 mph (96.56 km/h) | 00h 33m |
| 70 mph (112.65 km/h) | 00h 28m |
| 80 mph (129 km/h) | 00h 25m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.71 | $4.37 | $8.74 |
| Mid-grade | $4.24 | $5.01 | $10.01 |
| Premium | $4.79 | $5.65 | $11.30 |
| Diesel | $4.30 | $5.08 | $10.16 |
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 Ohio · 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.