How far is West Unity, OH from Dayton, OH?
The driving distance from West Unity, OH to Dayton, OH is about 150.9 miles (242.9 km), with a travel time of about 02h 47m by car.
- The straight-line flight distance is about 126.9 miles (204.2 km).
- For a round trip, plan for roughly 05h 34m 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 47m.
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.
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
Sunny
Driving Route Map
The map below follows the saved road route between West Unity and Dayton.
Turn-by-Turn Driving Directions
Step-by-step road directions between West Unity and Dayton.
-
1
Start on South High Street
36 m · 11 sec · South High Street
-
2
Turn left onto West Jackson Street
48 m · 3 sec · West Jackson Street
-
3
Turn left onto South Defiance Street
10.3 mi · 12 min · South Defiance Street
-
4
Turn left onto North Main Street
3.8 mi · 5 min · North Main Street
-
5
Turn slight right
14.4 mi · 22 min
-
6
Turn left
6.5 mi · 10 min
-
7
Turn left onto East Perry Street
16.6 mi · 23 min · East Perry Street
-
8
Enter the roundabout and take exit 1 toward the route
4 m · 1 sec
-
9
Exit the roundabout
16.4 mi · 25 min
-
10
Continue straight
42.2 mi · 53 min
-
11
Take the exit slight right
1236 ft · 41 sec
-
12
Turn left
21.8 mi · 25 min
-
13
Keep slight right to continue on SR 49 South: Clayton, Trotwood
10 mi · 15 min
-
14
Continue on West 1st Street
116 m · 7 sec · West 1st Street
-
15
Continue on West 1st Street
11 m · 1 sec · West 1st Street
-
16
Continue on West 1st Street
2425 ft · 58 sec · West 1st Street
-
17
Turn right onto North Ludlow Street
1052 ft · 27 sec · North Ludlow Street
-
18
Turn left onto West 3rd Street
157 m · 13 sec · West 3rd Street
-
19
Turn right onto South Main Street
68 m · 6 sec · South Main Street
-
20
Arrive at your destination
0 m · 1 sec · South Main Street
Car Route Details
A richer read on the saved driving route between West Unity and Dayton.
Straightforward drive
The saved road route has a manageable number of maneuvers and should be easy to follow with normal attention to signs.
East Perry Street
Continue straight
42.2 mi · 00h 53m
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 West Unity and Sunny near Dayton.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from West Unity to Dayton?
The road trip is about 150.9 miles (242.9 km) and usually takes 02h 47m 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?
Mendon is a useful midpoint, sitting about 71.6 miles from West Unity and 79.3 miles from Dayton.
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 24 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 12:56 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $19.75 one way or $39.50 round trip. Estimated CO2 is about 47.4 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around West Unity and Sunny near Dayton.
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 West Unity and Dayton. Straight-line distance: 126.89 mi (204.21 km).
#1 West Unity
City in Williams County, Ohio, United States of America
| Population | 1,670 |
| Coordinates | 41.5861600, -84.4349500 |
| Altitude | 240 |
| 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: 243 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 05h 01m |
| 40 mph (64.37 km/h) | 03h 46m |
| 50 mph (80.47 km/h) | 03h 01m |
| 60 mph (96.56 km/h) | 02h 30m |
| 70 mph (112.65 km/h) | 02h 09m |
| 80 mph (129 km/h) | 01h 52m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.71 | $19.75 | $39.50 |
| Mid-grade | $4.24 | $22.61 | $45.22 |
| Premium | $4.79 | $25.53 | $51.06 |
| Diesel | $4.30 | $22.94 | $45.88 |
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.