Origin
Harmony, OH
Morning in Harmony on Tuesday
Local time
6:12 AM
EDT
Current temp
71°F
Unavailable
Live forecast
Trip from Harmony, OH to Dayton, OH
Pin this tripCompiled and reviewed by the US Trip Planner planning team at COD Solutions Oy · Last reviewed Apr 21, 2026 · Editorial standards
Drive Time
40m
Distance
33.5 mi
54 km
Drive Score
6/10
Good drive
Same Day?
Yes, doable
Fuel Cost
$5
one way
EV Charging
Unknown
Best Time to Leave
4 AM
0h 37m
★
6 AM
0h 41m
8 AM
0h 47m
10 AM
0h 43m
12 PM
0h 42m
3 PM
0h 43m
5 PM
0h 47m
8 PM
0h 39m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Harmony, OH
Wikimedia Commons
Dayton, OH
Wikimedia Commons
Trip Overview
Traveling from Harmony to Dayton covers a short 33.5-mile distance that you can easily complete in about 35 minutes. This Midwest route is perfectly suited for a quick day trip, requiring no overnight stays or complex logistics. With a fuel budget of just $5, it remains an incredibly affordable excursion for your schedule. You will navigate via East National Road, I-70 West, and SR 4 to reach your destination. Because the journey is brief and straightforward, it serves as an efficient connection between these two Ohio locations.
Main Roads
| Road | Distance | Duration |
|---|---|---|
| I 70 | 20.2 mi | 21m |
| SR 4 | 11.4 mi | 14m |
| North Main Street | 0.8 mi | 1m |
| East National Road | 0.4 mi | <1m |
| Center Street | <0.1 mi | <1m |
| South Main Street | — | — |
Some road-level metrics are being recalculated.
Longest stretch:
I 70
— 20.2 mi, about 21m
Turn-by-Turn Driving Directions
Step-by-step road directions between Harmony, OH and Dayton, 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 41
Toward SR 4, SR 235: Dayton, New Carlisle
Use the straight / slight right lanes.
6
Keep slight left at fork onto SR 4
11 mi
·
14 min
·
SR 4
Toward SR 4, SR 235 South: Dayton
Use the slight left / slight right lanes.
7
Take the exit
0.2 mi
·
29 sec
Toward SR 48: Main Street, Grand Avenue
Use the straight / slight right lanes.
8
Turn left onto SR 48
0.8 mi
·
1 min
·
North Main Street
Use the left / straight lanes.
9
Arrive at destination
South Main Street
Heads-up: tricky spots
5 of 75 decision points cluster between mile 0.5 and 32.4 — 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
5
0.8 mi into trip
|
~1m in
|
I 70
Merge onto I 70
Merge point - match speed before joining. Lane positioning matters here
Use the straight / slight right lanes.
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
7
32.4 mi into trip
|
~38m in
Take the exit toward SR 48: Main Street, Grand Avenue
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.
Toward SR 48: Main Street, Grand Avenue
Fuel & Cost
Regular Gas
$5.20 one way
$10.40 round trip
$3.94/gal
25.4 MPG avg
12 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.38 | $5.77 | $11.54 |
| premium | $4.91 | $6.47 | $12.95 |
| diesel | $5.61 | $7.40 | $14.79 |
No toll roads detected on this route.
Drive Cost (one way)
Fuel
$5
Estimated CO2 emission: 11.7 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $4 in charging · 0 stops · 67% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 10 | 0 | $3.52 | $1.61 |
| Efficient EV | 8.4 | 0 | $2.93 | $1.34 |
| EV Truck/SUV | 13.4 | 0 | $4.69 | $2.14 |
Gas CO2
12 kg
EV CO2
4 kg (67% 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.
Destination
Dayton, OH
Morning in Dayton on Tuesday
Local time
6:12 AM
EDT
Current temp
51°F
Unavailable
Live forecast
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
40m 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.
What kind of drive is this?
Expect a turn-heavy local drive that keeps you engaged behind the wheel rather than settling into a monotonous interstate rhythm. While you will utilize I-70 West and SR 4, the route maintains a 0% highway share, emphasizing local roads over long-haul stretches. You won't find any extended straightaways here, as the longest stretch is 0 miles on East National Road. The personality of this drive is defined by constant transitions and maneuvering through local terrain. It provides a practical, hands-on driving experience that differs significantly from a high-speed highway commute.
94% highway — fuel and pacing are the main things to plan.
9 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 20.2 mi on I 70.
How Hard Is This Drive?
4/10
This is a straightforward highway drive that stays mostly on I 70 and SR 4. There are only a few real navigation decisions along the way. The trickiest moment comes around 0.5 miles in.
Driving Effort
4/10
Easy - simple navigation with a manageable amount of wheel time
Balances navigation complexity with total wheel time.
This is a straightforward 40m drive. You will face about 7 decision points, but nothing that requires special attention if you follow navigation.
Where does it get tricky?
The main spots that need attention: at 0.5 miles: Navigation decision point; at 0.8 miles (I 70): Merge point - match speed before joining. Lane positioning matters here; at 21 miles (SR 4): Exit ramp - move to the correct lane early. 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.
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 Dayton, OH, road signs begin pointing toward New Carlisle along the way.
New Carlisle
21 mi in
|
~23m
|
via SR 4
About the Cities
Arriving in Dayton, OH
Full guide →Founded 1796
Top landmarks
- • National Museum of the United States Air Force — aerospace museum at Wright-Patterson Air Force Base in Ohio, United States
- • Wright Flyer III — third powered aircraft built by the Wright brothers
- • Dayton Art Institute — art museum and school in Dayton, Ohio
City content from Wikivoyage (CC BY-SA 4.0) and Wikidata (CC0).
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 40m. Total distance: 33.5 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
40m drive, comfortable solo distance.
EV Driver
0 DC fast chargers along the route. Coverage: unknown.
First-Time Driver
Mostly highway driving (94%). Straightforward navigation.
Frequently Asked Questions
The longest stretch is about 20.2 miles on I 70. The full list of main roads is in the Roads section above.
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 0.8 miles (I 70): Merge point - match speed before joining. Lane positioning matters here; at 21 miles (SR 4): Exit ramp - move to the correct lane early. 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 Dayton, OH before heading back.
How this page is built
Compiled by the US Trip Planner planning team at COD Solutions Oy from open government datasets — OSRM over OpenStreetMap for geometry, EIA for fuel prices, and NPS for national parks. See our methodology for refresh cadence and limitations.
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