How far is Smithfield, OH from Dayton, OH?
The driving distance from Smithfield, OH to Dayton, OH is about 207.7 miles (334.3 km), with a travel time of about 03h 35m by car.
- The straight-line flight distance is about 183.9 miles (295.9 km).
- For a round trip, plan for roughly 07h 11m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM EST.
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 35m.
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.
Census-designated place in Licking County, Ohio
Route Weather Snapshot
Check the forecast at both ends before you head out.
Partly Cloudy
Driving Route Map
The map below follows the saved road route between Smithfield and Dayton.
Turn-by-Turn Driving Directions
Step-by-step road directions between Smithfield and Dayton.
-
1
Start on the route
27 m · 9 sec
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2
Turn right onto Tanner Street
21 m · 9 sec · Tanner Street
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3
Turn left onto Main Street
1315 ft · 32 sec · Main Street
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4
Turn left onto Wood Street
7.9 mi · 14 min · Wood Street
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5
Continue on Miller Street
2678 ft · 56 sec · Miller Street
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6
Turn left onto Miller Street
1176 ft · 28 sec · Miller Street
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7
Take the ramp left
1599 ft · 39 sec
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8
Merge slight left onto Cadiz-Steubenville Road
6.5 mi · 8 min · Cadiz-Steubenville Road
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9
Continue on Cadiz-Piedmont Road
16.8 mi · 23 min · Cadiz-Piedmont Road
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10
Continue on Cadiz Road
21.6 mi · 25 min · Cadiz Road
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11
Continue on Highland Avenue
1.2 mi · 2 min · Highland Avenue
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12
Turn slight right onto Wheeling Avenue
3188 ft · 1 min · Wheeling Avenue
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13
Turn slight left onto Dewey Avenue
1345 ft · 26 sec · Dewey Avenue
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14
Turn right onto John Glenn Highway
1.8 mi · 3 min · John Glenn Highway
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15
Turn left
1527 ft · 26 sec
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16
Take the ramp slight right
2194 ft · 54 sec
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17
Merge slight left
75.9 mi · 1 hr 24 min
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18
Keep slight left to continue on South Innerbelt
1.5 km · 1 min · South Innerbelt
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19
Continue on West Freeway
57.6 mi · 1 hr 3 min · West Freeway
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20
Take the exit slight right toward SR 4, SR 235: Dayton, New Carlisle
1730 ft · 42 sec
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21
Keep slight left to continue on SR 4, SR 235 South: Dayton
11.1 mi · 14 min
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22
Take the exit slight right toward SR 48: Main Street, Grand Avenue
1108 ft · 29 sec
-
23
Turn left onto North Main Street
1.4 km · 2 min · North Main Street
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24
Arrive at your destination
0 m · 1 sec · South Main Street
Car Route Details
A richer read on the saved driving route between Smithfield 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.
John Glenn Highway
Merge slight left
75.9 mi · 01h 24m
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.
Partly Cloudy leaving Smithfield and Sunny near Dayton.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Smithfield to Dayton?
The road trip is about 207.7 miles (334.3 km) and usually takes 03h 35m 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?
Harbor Hills is a useful midpoint, sitting about 102.7 miles from Smithfield and 105.1 miles from Dayton.
How much longer is the road route than the straight-line distance?
The direct path is about 183.9 miles (295.9 km), while the road route adds roughly 23.8 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 6:00 AM to 8:00 AM EST. If you want a more comfortable same-day return, try to leave by 9:48 AM EST.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $28.09 one way or $56.18 round trip. Estimated CO2 is about 65.1 kg one way.
What should you check before leaving?
Before you leave, expect Partly Cloudy around Smithfield and Sunny near Dayton.
Stop Ideas Near Harbor Hills
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 Harbor Hills.
Columbus, OH
Flight Path Map
This map shows the direct air route between Smithfield and Dayton. Straight-line distance: 183.88 mi (295.92 km).
#1 Smithfield
City in Jefferson County, Ohio, United States of America
| Population | 786 |
| Coordinates | 40.2709000, -80.7814700 |
| Altitude | 380 |
| 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 (-84.191659, 39.758956)
Estimated Travel Time
Distance: 334 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 06h 55m |
| 40 mph (64.37 km/h) | 05h 11m |
| 50 mph (80.47 km/h) | 04h 09m |
| 60 mph (96.56 km/h) | 03h 27m |
| 70 mph (112.65 km/h) | 02h 58m |
| 80 mph (129 km/h) | 02h 35m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.83 | $28.09 | $56.18 |
| Mid-grade | $4.41 | $32.35 | $64.69 |
| Premium | $4.95 | $36.31 | $72.61 |
| Diesel | $6.31 | $46.28 | $92.56 |
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 · Nov 09, 2026