How far is Mentor, OH from Portsmouth, OH?
The driving distance from Mentor, OH to Portsmouth, OH is about 252.3 miles (406.1 km), with a travel time of about 05h 06m by car.
- The straight-line flight distance is about 220.8 miles (355.4 km).
- For a round trip, plan for roughly 10h 13m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM EDT.
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 05h 06m.
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.
Human settlement in Morrow County, Ohio, United States of America
Route Weather Snapshot
Check the forecast at both ends before you head out.
Rain Showers Likely
Driving Route Map
The map below follows the saved road route between Mentor and Portsmouth.
Turn-by-Turn Driving Directions
Step-by-step road directions between Mentor and Portsmouth.
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1
Start on the route
35 m · 13 sec
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2
At the end of the road, turn left onto Center Street
1.2 mi · 3 min · Center Street
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3
Take the ramp right toward I 90 West: Cleveland
2251 ft · 55 sec
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4
Merge slight left
5 mi · 6 min
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5
Keep slight left
13.9 mi · 17 min
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6
Merge slight right onto Outerbelt East Freeway
3.6 mi · 4 min · Outerbelt East Freeway
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7
Keep slight left
24.3 mi · 27 min
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8
Merge slight left
113.2 mi · 2 hr 3 min
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9
Keep slight right
5.1 mi · 6 min
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10
Take the exit slight right toward I 270: Stringtown Road, Grove City
1678 ft · 41 sec
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11
Keep slight left to continue on I 270 East: Stringtown Road, Grove City
1011 ft · 25 sec
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12
Keep slight left to continue on I 270 East
1.3 km · 2 min
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13
Merge slight left onto Jack Nicklaus Freeway
1.1 mi · 1 min · Jack Nicklaus Freeway
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14
Take the exit slight right toward US 23 North, US 23 South: High Street, Circleville
1639 ft · 31 sec
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15
Keep slight right to continue on US 23 South: Circleville
1087 ft · 27 sec
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16
Keep slight right
901 ft · 22 sec
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17
Merge slight left onto South High Street
2.8 mi · 4 min · South High Street
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18
Continue on Portsmouth - Columbus Road
36.5 mi · 47 min · Portsmouth - Columbus Road
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19
Keep slight right
42.6 mi · 1 hr 1 min
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20
Keep slight left to continue on Chillicothe Street
3222 ft · 1 min · Chillicothe Street
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21
Turn right onto 2nd Street
63 m · 9 sec · 2nd Street
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22
Turn right
23 m · 11 sec
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23
Turn left
22 m · 5 sec
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24
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Mentor and Portsmouth.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Outerbelt East Freeway
Merge slight left
113 mi · 02h 03m
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.
Mostly Cloudy leaving Mentor and Rain Showers Likely near Portsmouth.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Mentor to Portsmouth?
The road trip is about 252.3 miles (406.1 km) and usually takes 05h 06m 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?
Marengo is a useful midpoint, sitting about 126.2 miles from Mentor and 126.1 miles from Portsmouth.
How much longer is the road route than the straight-line distance?
The direct path is about 220.8 miles (355.4 km), while the road route adds roughly 31.5 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 EDT. If you want a more comfortable same-day return, try to leave by 6:46 AM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $34.13 one way or $68.25 round trip. Estimated CO2 is about 79.2 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Cloudy around Mentor and Rain Showers Likely near Portsmouth.
Stop Ideas Near Marengo
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 Marengo.
Columbus, OH
Sandusky
Flight Path Map
This map shows the direct air route between Mentor and Portsmouth. Straight-line distance: 220.82 mi (355.37 km).
#1 Mentor
A city in Lake County, Ohio.
| Population | 47,090 |
| Coordinates | 41.6661600, -81.3395500 |
| Altitude | 211 |
| Country | United States |
#2 Portsmouth
City in Ohio
| Population | 19,744 |
| Coordinates | 38.7317400, -82.9976700 |
| Altitude | 162 |
| Country | United States |
End: Portsmouth (-82.99767, 38.73174)
Estimated Travel Time
Distance: 406 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 08h 24m |
| 40 mph (64.37 km/h) | 06h 18m |
| 50 mph (80.47 km/h) | 05h 02m |
| 60 mph (96.56 km/h) | 04h 12m |
| 70 mph (112.65 km/h) | 03h 36m |
| 80 mph (129 km/h) | 03h 08m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.83 | $34.13 | $68.25 |
| Mid-grade | $4.38 | $39.05 | $78.11 |
| Premium | $4.93 | $43.90 | $87.80 |
| Diesel | $6.07 | $54.07 | $108.13 |
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 · Oct 15, 2026