How far is Cincinnati, OH from Saint Marys, OH?
The driving distance from Cincinnati, OH to Saint Marys, OH is about 112.2 miles (180.5 km), with a travel time of about 02h 23m by car.
- The straight-line flight distance is about 98 miles (157.7 km).
- For a round trip, plan for roughly 04h 46m 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 23m.
A morning start gives you useful time at the destination and keeps the return out of the late evening.
This departure sits inside the recommended comfort window for the route.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
Neighborhood of Los Angeles, California, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Chance Rain Showers
Driving Route Map
The map below follows the saved road route between Cincinnati and Saint Marys.
Turn-by-Turn Driving Directions
Step-by-step road directions between Cincinnati and Saint Marys.
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1
Start on Ohio Avenue
30 m · 6 sec · Ohio Avenue
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2
Turn right onto West McMillan Avenue
876 ft · 27 sec · West McMillan Avenue
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3
Turn left onto Vine Street
86 m · 10 sec · Vine Street
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4
Continue on Jefferson Avenue
2889 ft · 1 min · Jefferson Avenue
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5
Continue on Vine Street
2 mi · 5 min · Vine Street
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6
Turn left onto West Mitchell Avenue
1490 ft · 40 sec · West Mitchell Avenue
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7
Take the ramp right toward I 75 North: Dayton
1927 ft · 49 sec
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8
Merge slight left onto Mill Creek Expressway
47.4 mi · 57 min · Mill Creek Expressway
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9
Keep slight left to continue on I 75 North: Toledo
39.3 mi · 44 min
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10
Take the exit slight right toward SR 29: Saint Marys, Sidney
1338 ft · 36 sec
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11
Turn left onto Saint Marys Avenue
11.8 mi · 16 min · Saint Marys Avenue
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12
Turn right
8.9 mi · 16 min
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13
At the end of the road, turn left onto East Spring Street
1.2 mi · 2 min · East Spring Street
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14
Turn left onto South Front Street
32 m · 5 sec · South Front Street
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15
Arrive at your destination
0 m · 1 sec · South Front Street
Car Route Details
A richer read on the saved driving route between Cincinnati and Saint Marys.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Mill Creek Expressway
Merge slight left onto Mill Creek Expressway
47.4 mi · 00h 57m
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 Cincinnati and Chance Rain Showers near Saint Marys.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Cincinnati to Saint Marys?
The road trip is about 112.2 miles (180.5 km) and usually takes 02h 23m 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?
Northridge is a useful midpoint, sitting about 56.1 miles from Cincinnati and 56 miles from Saint Marys.
How much longer is the road route than the straight-line distance?
The direct path is about 98 miles (157.7 km), while the road route adds roughly 14.2 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 1:44 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $14.67 one way or $29.34 round trip. Estimated CO2 is about 35.2 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Cincinnati and Chance Rain Showers near Saint Marys.
Stop Ideas Near Northridge
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Scene75 Entertainment Center | Dayton
City of Riverside Administration Offices
Town Hall Theatre
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Northridge.
Connersville station
Cincinnati, OH
Cincinnati Museum Center at Union Terminal
Columbus, OH
Flight Path Map
This map shows the direct air route between Cincinnati and Saint Marys. Straight-line distance: 98 mi (157.72 km).
#1 Cincinnati
The third most populous city in Ohio and the center of the Cincinnati metropolitan area.
| Population | 304,548 |
| Coordinates | 39.1271100, -84.5143900 |
| Altitude | 191 |
| Country | United States |
#2 Saint Marys
City in Ohio, United States
| Population | 8,113 |
| Coordinates | 40.5422700, -84.3894000 |
| Altitude | 264 |
| Country | United States |
End: Saint Marys (-84.3894, 40.54227)
Estimated Travel Time
Distance: 181 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 03h 44m |
| 40 mph (64.37 km/h) | 02h 48m |
| 50 mph (80.47 km/h) | 02h 14m |
| 60 mph (96.56 km/h) | 01h 52m |
| 70 mph (112.65 km/h) | 01h 36m |
| 80 mph (129 km/h) | 01h 23m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.71 | $14.67 | $29.34 |
| Mid-grade | $4.24 | $16.80 | $33.60 |
| Premium | $4.79 | $18.97 | $37.94 |
| Diesel | $4.30 | $17.04 | $34.09 |
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 19, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.