How far is Marion, OH from Dayton, OH?
The driving distance from Marion, OH to Dayton, OH is about 91 miles (146.4 km), with a travel time of about 01h 44m by car.
- The straight-line flight distance is about 80.2 miles (129.1 km).
- For a round trip, plan for roughly 03h 29m 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 01h 44m.
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 Champaign County, Ohio, United States of America
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Driving Route Map
The map below follows the saved road route between Marion and Dayton.
Turn-by-Turn Driving Directions
Step-by-step road directions between Marion and Dayton.
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1
Start on East Center Street
157 m · 18 sec · East Center Street
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2
Turn left onto South Prospect Street
1.8 mi · 3 min · South Prospect Street
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3
Continue on Marion-Marysville Road
24.5 mi · 36 min · Marion-Marysville Road
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4
Take the ramp right
1463 ft · 36 sec
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5
Keep slight left to continue on US 33 West, US 36 West, SR 4 South
1.5 mi · 2 min
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6
Take the exit slight right toward US 36 West, SR 4 South: Urbana, Springfield
564 ft · 14 sec
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7
Keep slight left to continue on US 36 West, SR 4 South: Urbana, Springfield
28.5 mi · 34 min
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8
Turn right onto State Route 334
3.7 mi · 4 min · State Route 334
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9
Turn left
2639 ft · 1 min
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10
Merge slight left onto US Route 68
4.3 mi · 5 min · US Route 68
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11
Take the exit slight right toward US 40 West, SR 4 West: Dayton
1024 ft · 30 sec
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12
Turn left onto Upper Valley Pike
154 m · 11 sec · Upper Valley Pike
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13
Turn right onto West Main Street
810 ft · 11 sec · West Main Street
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14
Continue on West National Road
928 ft · 12 sec · West National Road
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15
Keep slight left
11 mi · 12 min
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16
Take the exit slight right toward SR 4, SR 235: Dayton, New Carlisle
1730 ft · 42 sec
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17
Keep slight left to continue on SR 4, SR 235 South: Dayton
11.1 mi · 14 min
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18
Take the exit slight right toward SR 48: Main Street, Grand Avenue
1108 ft · 29 sec
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19
Turn left onto North Main Street
1.4 km · 2 min · North Main Street
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20
Arrive at your destination
0 m · 1 sec · South Main Street
Car Route Details
A richer read on the saved driving route between Marion and Dayton.
Interchange-aware route
The drive includes several ramps, exits, or merges, so checking the next few maneuvers before busy interchanges is useful.
US 36 West
Keep slight left to continue on US 36 West, SR 4 South: Urbana, Springfield
28.5 mi · 00h 34m
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.
Sunny leaving Marion and Sunny near Dayton.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Marion to Dayton?
The road trip is about 91 miles (146.4 km) and usually takes 01h 44m 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?
Mutual is a useful midpoint, sitting about 44.7 miles from Marion and 46.3 miles from Dayton.
How much longer is the road route than the straight-line distance?
The direct path is about 80.2 miles (129.1 km), while the road route adds roughly 10.8 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 8:00 AM to 10:00 AM EDT. If you want a more comfortable same-day return, try to leave by 3:00 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $11.89 one way or $23.79 round trip. Estimated CO2 is about 28.5 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Marion and Sunny near Dayton.
Stop Ideas Near Mutual
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
London City Hall
South Vienna Town Hall
Town Hall Emporium
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Mutual.
Columbus, OH
Flight Path Map
This map shows the direct air route between Marion and Dayton. Straight-line distance: 80.23 mi (129.11 km).
#1 Marion
County seat of Marion County, Ohio, United States
| Population | 35,516 |
| Coordinates | 40.5886700, -83.1285200 |
| Altitude | 299 |
| 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: 146 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 03h 01m |
| 40 mph (64.37 km/h) | 02h 16m |
| 50 mph (80.47 km/h) | 01h 49m |
| 60 mph (96.56 km/h) | 01h 30m |
| 70 mph (112.65 km/h) | 01h 17m |
| 80 mph (129 km/h) | 01h 08m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.71 | $11.89 | $23.79 |
| Mid-grade | $4.24 | $13.62 | $27.23 |
| Premium | $4.79 | $15.38 | $30.75 |
| Diesel | $4.30 | $13.82 | $27.63 |
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.