This 84.6-mile journey from Harmony to Cincinnati, Ohio, is designed for a single day, taking approximately 1 hour and 29 minutes to complete. You'll navigate primarily via East National Road and SR 4, with a brief stint on I-70 West. Given its relatively short duration and a fuel cost estimated at $13, this route is perfect for a straightforward day trip without the need for an overnight stay. The drive offers a local feel, making it a practical way to travel within the Midwest region.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Midpoint
41.7 miles from Harmony, OH
A natural place for your longest stop of the day
, about 48m into the drive
.
Main Roads
Road
Distance
Duration
SR 4
59.1 mi
1h 11m
I 70
20.2 mi
21m
Vine Street
1.9 mi
4m
Jefferson Avenue
0.5 mi
1m
East National Road
0.4 mi
<1m
West Mitchell Avenue
0.3 mi
<1m
Calhoun Street
0.2 mi
<1m
Center Street
<0.1 mi
<1m
Longest stretch:
SR 4
— 59.1 mi, about 1h 11m
Turn-by-Turn Driving Directions
Step-by-step road directions between Harmony, OH and Cincinnati, OH.
1
Start on Center Street
342 ft·17 sec·Center Street
2
Turn right onto US 40
0.4 mi·40 sec·East National Road
3
Take the ramp
0.4 mi·46 sec
Toward I 70 West: Dayton
4
Merge onto I 70
20 mi·21 min·I 70
Use the straight / slight right lanes.
5
Take the exit onto SR 4
0.3 mi·42 sec·SR 4
Exit 41Toward SR 4, SR 235: Dayton, New CarlisleUse the straight / slight right lanes.
6
Keep slight left at fork onto SR 4
59 mi·1 hr 11 min·SR 4
Toward SR 4, SR 235 South: DaytonUse the slight left / slight right lanes.
7
Take the exit
0.2 mi·21 sec
Exit 6Toward Mitchell Avenue, Saint BernardUse the slight right lane.
8
Keep slight left at fork
248 ft·13 sec
Toward Saint Bernard, Xavier University, Veterans Affairs Medical Center, Zoo
9
Turn left onto West Mitchell Avenue
0.3 mi·41 sec·West Mitchell Avenue
10
Turn slight right
195 ft·8 sec
11
Turn slight right onto Vine Street
1.9 mi·4 min·Vine Street
12
Continue on Jefferson Avenue
0.5 mi·1 min·Jefferson Avenue
Use the left / straight / right lanes.
13
Turn slight right
339 ft·8 sec
14
Turn slight right onto Calhoun Street
0.2 mi·33 sec·Calhoun Street
15
Turn left onto Ohio Avenue
340 ft·13 sec·Ohio Avenue
16
Arrive at destination
Ohio Avenue
Trip Plan
With a drive time of under 1.5 hours and a fuel cost of around $13, this trip offers flexibility. Aim to depart Harmony when you feel most comfortable, as there are no designated "longest stretches" requiring careful pacing. Since this is a local drive with 0% highway share, plan for potential traffic lights and varied speed limits as you traverse East National Road and SR 4. Taking your time to enjoy the local scenery is feasible, and you won't need to worry about extensive fuel stops for this short distance.
Morning Departure
Leave by 9 AM and you'll arrive before lunch.
Evening Departure
Even a 4 PM departure gets you there before dark in summer.
You can normally do this drive in one day.
You may only need one short stretch break if traffic stays light.
The halfway point lands around 41.7 miles from Harmony, OH, or about 48m into the drive.
The longest continuous stretch on this route runs about 59.1 miles.
This is a comfortable same-day trip.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 18 miles or 20m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 41.7 miles or 48m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 1h 24m
Traffic, exits, and arrival timing usually matter more near Cincinnati, OH than in the middle of the route.
Before You Leave
+
Open the route before leaving Harmony, OH so your first major turns are already loaded.
Day 1
Settle into the route from Harmony, OH
This is one driving day of about 83.4 miles and 1h 43m.
Your first comfortable stop window is around 18 miles from Harmony, OH.
This route can stay practical as a one-day drive if traffic stays reasonable.
The longest stretch is on SR 4 for about 59.1 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Place data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 9
5 decision points cluster between mile 0.5 and 80.3 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
5
0.5 mi into trip|~0m in
Take the ramp toward I 70 West: Dayton
Navigation decision point
Toward I 70 West: Dayton
8
21 mi into trip|~23m in|SR 4
Take the exit onto SR 4 toward SR 4, SR 235: Dayton, New Carlisle
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Exit 41
Toward SR 4, SR 235: Dayton, New Carlisle
8
21.3 mi into trip|~24m in|SR 4
Keep slight left at fork onto SR 4 toward SR 4, SR 235 South: Dayton
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight left / slight right lanes.
Toward SR 4, SR 235 South: Dayton
8
80.1 mi into trip|~1h 35m in
Take the exit toward Mitchell Avenue, Saint Bernard
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Exit 6
Toward Mitchell Avenue, Saint Bernard
7
80.3 mi into trip|~1h 35m in
Keep slight left at fork toward Saint Bernard, Xavier University, Veterans Affairs Medical Center, Zoo
Highway fork - watch signs carefully. Multiple destination signs - pick the right one
Toward Saint Bernard, Xavier University, Vetera...
Fuel & Cost
Regular Gas
$12.94 one way
$25.89 round trip
$3.94/gal25.4 MPG avg29 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.38
$14.37
$28.73
premium
$4.91
$16.12
$32.24
diesel
$5.61
$18.41
$36.83
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$13
Meals
$25–$50
Total
$38–$63
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 29.2 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $9 in charging
· 0 stops
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
25
0
$8.76
$4.00
Efficient EV
20.9
0
$7.30
$3.34
EV Truck/SUV
33.4
0
$11.68
$5.34
Gas CO2
29 kg
EV CO2
10 kg (66% less)
This trip is well within single-charge range for most EVs. No charging stops needed if you start fully charged.
DC fast charging avg $0.35/kWh. Home charging avg $0.16/kWh. US grid CO2: 0.39 kg/kWh.
Travel Intel
Current conditions at both ends of the drive.
Forecast as of Apr 20, 2026
Origin
Harmony, OH
Morning
in Harmony on Tuesday
Local time
6:38 AM
EDT
Current temp
71°F
Unavailable
Live forecast
Destination
Cincinnati, OH
Morning
in Cincinnati on Tuesday
Local time
6:38 AM
EDT
Current temp
51°F
Unavailable
Live forecast
Seasonal Notes
Summer travel usually means heavier construction, hotter rest stops, and busier weekend traffic around major cities.
Winter travel shortens daylight, so a route that looks manageable on paper can feel much longer after dark.
Holiday weekends tend to make both departure and arrival windows slower than the raw route time suggests.
Time zone
Same local time
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
Temperature spread
20 degrees cooler at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
1h 43m on the road
Use the two city cards together: check the sky where you start, then compare it with the local time and temperature at arrival.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
National Parks Near This Route
Worth a detour if your schedule allows.
Dayton Aviation Heritage National Historical Park
National Historical Park
Dayton Aviation Heritage National Historical Park was established to honor the lives and achievements of poet and author Paul Laurence Dunbar and aviation pioneers Wilbur and Orville Wright. Through p...
Throughout his life, Charles Young overcame countless obstacles in his ascent to prominence. In spite of overt racism and stifling inequality, Young rose through the military ranks to become one of th...
12 mi from route
~30 min detour
Free
near mile 17.3
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
Expect a "turn-heavy local drive" on this route, with no highway miles contributing to the total. This means you'll be experiencing a more connected, ground-level perspective for the entire 84.6 miles. While there isn't a "longest stretch" to report due to its local nature, be prepared for frequent changes in speed and road conditions as you move through various communities. The profile suggests a route that emphasizes local roads over high-speed travel.
95% highway — fuel and pacing are the main things to plan.
16 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 59.1 mi on SR 4.
How Hard Is This Drive?
6/10
This is a straightforward highway drive that stays mostly on SR 4 and I 70. You will hit about 9 points where you need to pay attention to lane position or signs. The trickiest moment comes around 0.5 miles in.
Driving Effort6/10
Moderate - straightforward overall, but long enough or busy enough to require pacing
Balances navigation complexity with total wheel time.
This drive requires moderate attention. Across 83.4 miles you will encounter 9 spots where lane choice or exit timing matters. Not difficult for experienced highway drivers, but worth previewing the tricky sections before you go.
Where does it get tricky?
The main spots that need attention: at 0.5 miles: Navigation decision point; at 21 miles (SR 4): Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 21.3 miles (SR 4): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
On the drive from Harmony, OH to Cincinnati, OH, road signs begin pointing toward New Carlisle along the way.
Cincinnati is Ohio's third largest city and the largest metro region, and lies on the north bank of the Ohio River in Southwest Ohio in the United States of America.
Cincinnati is distinct amongst Midwestern cities. Its culture is a mixture of the Northeast, Old South, Midwest, and Appalachia blended with a strong German-Catholic heritage. It was one of the United States' early boomtowns, and the Over-the-Rhine neighborhood is the largest National Historic District in the country. Today, it's part of a fast-growing metro area, and home to a remarkable blend of industry and architecture. Downtown Cincinnati is surrounded by picturesque foothills that add a beautiful backdrop to the Queen City and its legendary skyline – celebrated in the opening credits of television show WKRP in Cincinnati.
Top landmarks
•Carew Tower — skyscraper in Cincinnati, Ohio, United States
•Cathedral Basilica of St. Peter in Chains — cathedral of the Roman Catholic Archdiocese of Cincinnati in downtown Cincinnati...
•Cincinnati Observatory — other organization in Cincinnati, United States
Doable as a same-day drive at 1h 43m. Total distance: 83.4 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
1h 43m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (95%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 59.1 miles on SR 4. The full list of main roads is in the Roads section above.
It helps. This route has a higher-than-average number of complex decision points, which get harder in the dark. If the last hour of the trip is on surface roads or mountain grades, aim to arrive at Cincinnati, OH before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.
Yes. At under 2 hours behind the wheel, this works well for families — plan one quick stop if you have younger kids.
The main spots that need attention: at 0.5 miles: Navigation decision point; at 21 miles (SR 4): Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 21.3 miles (SR 4): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Yes — Dayton Aviation Heritage National Historical Park and Charles Young Buffalo Soldiers National Monument. See the National Parks section for detour distances and tips on detours.
Yes. A round trip is manageable in a single day if you plan a break at Cincinnati, OH before heading back.
