How far is Dayton, OH from West Unity, OH?
The driving distance from Dayton, OH to West Unity, OH is about 142.9 miles (230 km), with a travel time of about 03h 11m by car.
- The straight-line flight distance is about 126.9 miles (204.2 km).
- For a round trip, plan for roughly 06h 23m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 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 03h 11m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
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.
Human settlement in Mercer County, Ohio, United States of America
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 Dayton and West Unity.
Turn-by-Turn Driving Directions
Step-by-step road directions between Dayton and West Unity.
-
1
Start on South Main Street
757 ft · 30 sec · South Main Street
-
2
Turn left onto West 2nd Street
2417 ft · 1 min · West 2nd Street
-
3
Continue on West 2nd Street
668 ft · 13 sec · West 2nd Street
-
4
Continue on West 1st Street
116 m · 7 sec · West 1st Street
-
5
Continue on Salem Avenue
11.4 mi · 17 min · Salem Avenue
-
6
Take the exit slight right toward SR 49 North: Phillipsburg, Greenville
1806 ft · 44 sec
-
7
Keep slight right to continue on SR 49 North: Phillipsburg, Greenville
19.9 mi · 23 min
-
8
Take the exit right
1374 ft · 38 sec
-
9
Merge slight left
41.2 mi · 51 min
-
10
Continue straight
16.2 mi · 25 min
-
11
Continue straight
1.2 mi · 2 min
-
12
Enter the roundabout and take exit 3 toward the route
65 m · 4 sec
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13
Exit the roundabout
16.6 mi · 23 min
-
14
Turn right onto North Williams Street
6.5 mi · 10 min · North Williams Street
-
15
Continue straight
14.3 mi · 21 min
-
16
At the end of the road, turn left
1.4 km · 1 min
-
17
Continue straight
3 mi · 4 min
-
18
Turn right
10.3 mi · 12 min
-
19
Turn right onto South High Street
36 m · 5 sec · South High Street
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20
Arrive at your destination
0 m · 1 sec · South High Street
Car Route Details
A richer read on the saved driving route between Dayton and West Unity.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
SR 49 North
Merge slight left
41.2 mi · 00h 51m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Sunny leaving Dayton and Mostly Sunny near West Unity.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Dayton to West Unity?
The road trip is about 142.9 miles (230 km) and usually takes 03h 11m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
Mendon is a useful midpoint, sitting about 71.5 miles from Dayton and 71.4 miles from West Unity.
How much longer is the road route than the straight-line distance?
The direct path is about 126.9 miles (204.2 km), while the road route adds roughly 16 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 8:00 AM EDT. If you want a more comfortable same-day return, try to leave by 10:36 AM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $18.67 one way or $37.35 round trip. Estimated CO2 is about 44.8 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Dayton and Mostly Sunny near West Unity.
Stop Ideas Near Mendon
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 Mendon.
Bryan
Waterloo
Flight Path Map
This map shows the direct air route between Dayton and West Unity. Straight-line distance: 126.89 mi (204.21 km).
#1 Dayton
The ninth most populous city in Ohio.
| Population | 139,907 |
| Coordinates | 39.7589500, -84.1916100 |
| Altitude | 225 |
| Country | United States |
#2 West Unity
City in Williams County, Ohio, United States of America
| Population | 1,670 |
| Coordinates | 41.5861600, -84.4349500 |
| Altitude | 240 |
| Country | United States |
End: West Unity (-84.43495, 41.58616)
Estimated Travel Time
Distance: 230 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 04h 45m |
| 40 mph (64.37 km/h) | 03h 34m |
| 50 mph (80.47 km/h) | 02h 51m |
| 60 mph (96.56 km/h) | 02h 22m |
| 70 mph (112.65 km/h) | 02h 02m |
| 80 mph (129 km/h) | 01h 46m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.71 | $18.67 | $37.35 |
| Mid-grade | $4.24 | $21.38 | $42.76 |
| Premium | $4.79 | $24.14 | $48.28 |
| Diesel | $4.30 | $21.69 | $43.38 |
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.