How far is Defiance, OH from Dayton, OH?
The driving distance from Defiance, OH to Dayton, OH is about 117.5 miles (189.1 km), with a travel time of about 02h 04m by car.
- The straight-line flight distance is about 105.8 miles (170.2 km).
- For a round trip, plan for roughly 04h 08m 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 04m.
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.
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Defiance and Dayton.
Turn-by-Turn Driving Directions
Step-by-step road directions between Defiance and Dayton.
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1
Start on Auglaize Street
8 m · 7 sec · Auglaize Street
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2
Turn left onto East 2nd Street
1386 ft · 24 sec · East 2nd Street
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3
Turn right onto Douglas Street
584 ft · 12 sec · Douglas Street
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4
Continue on Ottawa Avenue
1.5 km · 1 min · Ottawa Avenue
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5
Enter the roundabout and take exit 2 toward Ottawa Avenue;Cleveland Avenue
38 m · 2 sec · Ottawa Avenue
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6
Exit the rotary onto Ottawa Avenue
25.5 mi · 38 min · Ottawa Avenue
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7
Continue on North Perry Street
1033 ft · 18 sec · North Perry Street
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8
Turn straight onto North Elm Street
13.5 mi · 18 min · North Elm Street
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9
Continue on North Perrysburg Road
816 ft · 14 sec · North Perrysburg Road
-
10
Continue on Ottawa Road - South Perrysburg Road
2.5 mi · 4 min · Ottawa Road - South Perrysburg Road
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11
Continue on North West Street
3.2 mi · 5 min · North West Street
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12
Turn left onto West Grand Avenue
145 m · 10 sec · West Grand Avenue
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13
Turn right onto North Elizabeth Street
2531 ft · 47 sec · North Elizabeth Street
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14
Turn right onto West Wayne Street
84 m · 10 sec · West Wayne Street
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15
Turn left onto North West Street
2451 ft · 49 sec · North West Street
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16
Turn right onto West Elm Street
1529 ft · 31 sec · West Elm Street
-
17
Turn left onto South Metcalf Street
1.5 mi · 3 min · South Metcalf Street
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18
Continue on South Dixie Highway
2.1 mi · 4 min · South Dixie Highway
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19
Turn left onto West Breese Road
1135 ft · 36 sec · West Breese Road
-
20
Take the ramp right toward I 75 South: Dayton
1279 ft · 31 sec
-
21
Merge slight left
65.5 mi · 1 hr 12 min
-
22
Merge slight left
51 m · 2 sec
-
23
Take the exit slight right toward SR 48: Main Street, Grand Avenue
1108 ft · 29 sec
-
24
Turn left onto North Main Street
1.4 km · 2 min · North Main Street
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25
Arrive at your destination
0 m · 1 sec · South Main Street
Car Route Details
A richer read on the saved driving route between Defiance and Dayton.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
I 75 South
Merge slight left
65.5 mi · 01h 12m
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.
Partly Sunny leaving Defiance and Mostly Sunny near Dayton.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Defiance to Dayton?
The road trip is about 117.5 miles (189.1 km) and usually takes 02h 04m 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?
Wapakoneta is a useful midpoint, sitting about 59.3 miles from Defiance and 58.2 miles from Dayton.
How much longer is the road route than the straight-line distance?
The direct path is about 105.8 miles (170.2 km), while the road route adds roughly 11.7 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 2:22 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $15.34 one way or $30.68 round trip. Estimated CO2 is about 36.8 kg one way.
What should you check before leaving?
Before you leave, expect Partly Sunny around Defiance and Mostly Sunny near Dayton.
Stop Ideas Near Wapakoneta
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 Wapakoneta.
Bryan
Waterloo
Flight Path Map
This map shows the direct air route between Defiance and Dayton. Straight-line distance: 105.76 mi (170.2 km).
#1 Defiance
City in and the county seat of Defiance County, Ohio, United States
| Population | 16,482 |
| Coordinates | 41.2844900, -84.3557800 |
| Altitude | 206 |
| 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: South Main Street (-84.191655, 39.758942)
Estimated Travel Time
Distance: 189 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 03h 54m |
| 40 mph (64.37 km/h) | 02h 56m |
| 50 mph (80.47 km/h) | 02h 20m |
| 60 mph (96.56 km/h) | 01h 57m |
| 70 mph (112.65 km/h) | 01h 40m |
| 80 mph (129 km/h) | 01h 27m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.71 | $15.34 | $30.68 |
| Mid-grade | $4.24 | $17.56 | $35.12 |
| Premium | $4.79 | $19.83 | $39.66 |
| Diesel | $4.30 | $17.82 | $35.64 |
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 18, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.