How far is Dayton, OH from Decatur, OH?
The driving distance from Dayton, OH to Decatur, OH is about 89.4 miles (143.9 km), with a travel time of about 02h 12m by car.
- The straight-line flight distance is about 70.2 miles (113 km).
- For a round trip, plan for roughly 04h 25m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM EDT.
Reverse, save, or send this route
This route works well as a day trip with time at the destination. Copy the route link, send it to another device, or print a clean version before you head out.
This route works well as a day trip with time at the destination.
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 02h 12m.
A morning start gives you useful time at the destination and keeps the return out of the late evening.
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 Clinton County, Ohio, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Dayton and Decatur.
Turn-by-Turn Driving Directions
Step-by-step road directions between Dayton and Decatur.
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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
16.4 mi · 23 min
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6
Take the exit slight right toward US 68: Home Avenue, Wilmington
1437 ft · 38 sec
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7
Turn right
14.8 mi · 22 min
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8
Take the ramp left toward SR 73 East: Hillsboro
1451 ft · 36 sec
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9
Merge slight left onto Wilmington Bypass
14 mi · 18 min · Wilmington Bypass
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10
Continue on High Street
9.4 mi · 14 min · High Street
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11
Turn left onto West Main Street
710 ft · 16 sec · West Main Street
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12
Turn right onto South High Street
16.6 mi · 24 min · South High Street
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13
Continue on Main Street
10.2 mi · 15 min · Main Street
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14
Turn left onto East Main Street
1.2 km · 1 min · East Main Street
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15
Keep slight right
4.9 mi · 9 min
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16
Keep slight left
1.2 km · 1 min
-
17
Turn left onto Eagle Street
26 m · 2 sec · Eagle Street
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18
Arrive at your destination
0 m · 1 sec · Eagle Street
Car Route Details
A richer read on the saved driving route between Dayton and Decatur.
Interchange-aware route
The drive includes several ramps, exits, or merges, so checking the next few maneuvers before busy interchanges is useful.
South High Street
Turn right onto South High Street
16.6 mi · 00h 25m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A comfortable day-trip route
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
Mostly Sunny leaving Dayton and Mostly Sunny near Decatur.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Dayton to Decatur?
The road trip is about 89.4 miles (143.9 km) and usually takes 02h 12m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
What is the halfway point on this route?
New Vienna is a useful midpoint, sitting about 44.7 miles from Dayton and 44.7 miles from Decatur.
How much longer is the road route than the straight-line distance?
The direct path is about 70.2 miles (113 km), while the road route adds roughly 19.2 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 8:00 AM to 10:00 AM EDT. If you want a more comfortable same-day return, try to leave by 2:04 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $11.71 one way or $23.42 round trip. Estimated CO2 is about 28.1 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Dayton and Mostly Sunny near Decatur.
Stop Ideas Near New Vienna
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 New Vienna.
Cincinnati, OH
Maysville
Cincinnati Museum Center at Union Terminal
South Portsmouth–South Shore station
Flight Path Map
This map shows the direct air route between Dayton and Decatur. Straight-line distance: 70.2 mi (112.98 km).
#1 Dayton
The ninth most populous city in Ohio.
| Population | 139,907 |
| Coordinates | 39.7589500, -84.1916100 |
| Altitude | 225 |
| Country | United States |
#2 Decatur
Human settlement in Ohio, United States of America
| Population | 1,266 |
| Coordinates | 38.8156300, -83.7038100 |
| Altitude | 282 |
| Country | United States |
End: Decatur (-83.70381, 38.81563)
Estimated Travel Time
Distance: 144 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 02h 58m |
| 40 mph (64.37 km/h) | 02h 14m |
| 50 mph (80.47 km/h) | 01h 47m |
| 60 mph (96.56 km/h) | 01h 29m |
| 70 mph (112.65 km/h) | 01h 16m |
| 80 mph (129 km/h) | 01h 06m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.71 | $11.71 | $23.42 |
| Mid-grade | $4.24 | $13.40 | $26.81 |
| Premium | $4.79 | $15.14 | $30.27 |
| Diesel | $4.30 | $13.60 | $27.20 |
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 · May 30, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.