How far is Decatur, IN from Portage, IN?
The driving distance from Decatur, IN to Portage, IN is about 155.8 miles (250.7 km), with a travel time of about 02h 52m by car.
- The straight-line flight distance is about 127.6 miles (205.4 km).
- For a round trip, plan for roughly 05h 44m 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 52m.
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.
Town in Indiana, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Chance Rain Showers
Partly Sunny
Driving Route Map
The map below follows the saved road route between Decatur and Portage.
Turn-by-Turn Driving Directions
Step-by-step road directions between Decatur and Portage.
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1
Start on West Monroe Street
2422 ft · 46 sec · West Monroe Street
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2
Turn right onto North 13th Street
15.9 mi · 18 min · North 13th Street
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3
Continue on Lafayette Street
4.7 mi · 6 min · Lafayette Street
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4
Keep slight right to continue on Lafayette Street
1.4 km · 1 min · Lafayette Street
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5
Continue on Spy Run Avenue
1.1 mi · 2 min · Spy Run Avenue
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6
Continue on North Clinton Street
2084 ft · 28 sec · North Clinton Street
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7
Turn straight onto Lima Road
1.1 mi · 1 min · Lima Road
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8
Turn left onto West Coliseum Boulevard
1.6 mi · 2 min · West Coliseum Boulevard
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9
Take the exit slight right toward SR 930 West
863 ft · 24 sec
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10
Merge slight left onto Goshen Road
1625 ft · 21 sec · Goshen Road
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11
Continue straight
12.7 mi · 16 min
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12
Continue straight
88.8 mi · 1 hr 56 min
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13
Take the exit slight right toward SR 49 North, SR 2 East: Valparaiso, Chesterton
9.2 mi · 13 min
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14
Turn left onto I 80, I 90: Toll Road
120 m · 10 sec
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15
Continue straight
757 ft · 18 sec
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16
Continue on I 80, I 90: Toll Road
125 m · 10 sec
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17
Keep slight right to continue on I 80 West, I 90 West: Chicago
1246 ft · 31 sec
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18
Merge slight left onto Indiana Toll Road
6.5 mi · 8 min · Indiana Toll Road
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19
Take the exit slight right toward Portage
3121 ft · 1 min
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20
Keep slight left
47 m · 11 sec
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21
Turn left onto Willowcreek Road
3071 ft · 1 min · Willowcreek Road
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22
Turn left onto Central Avenue
1906 ft · 50 sec · Central Avenue
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23
Arrive at your destination
0 m · 1 sec · Central Avenue
Car Route Details
A richer read on the saved driving route between Decatur and Portage.
Interchange-aware route
The drive includes several ramps, exits, or merges, so checking the next few maneuvers before busy interchanges is useful.
Goshen Road
Continue straight
88.8 mi · 01h 56m
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.
Chance Rain Showers leaving Decatur and Partly Sunny near Portage.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Decatur to Portage?
The road trip is about 155.8 miles (250.7 km) and usually takes 02h 52m 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?
Etna Green is a useful midpoint, sitting about 72.9 miles from Decatur and 83 miles from Portage.
How much longer is the road route than the straight-line distance?
The direct path is about 127.6 miles (205.4 km), while the road route adds roughly 28.2 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 12:46 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $20.74 one way or $41.48 round trip. Estimated CO2 is about 48.9 kg one way.
Do you cross a time zone on this route?
Yes. There is about a 1 hour time difference between Decatur and Portage, so arrival and return times should be read in local time.
What should you check before leaving?
Before you leave, expect Chance Rain Showers around Decatur and Partly Sunny near Portage.
Stop Ideas Near Etna Green
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 Etna Green.
Elkhart station
South Bend station
Niles station
Dowagiac station
Flight Path Map
This map shows the direct air route between Decatur and Portage. Straight-line distance: 127.65 mi (205.43 km).
#1 Decatur
City in Indiana, United States
| Population | 34,821 |
| Coordinates | 40.8306000, -84.9291300 |
| Altitude | 244 |
| Country | United States |
#2 Portage
The second most populous city in Porter County, Indiana.
| Population | 90,543 |
| Coordinates | 41.5758700, -87.1761500 |
| Altitude | 194 |
| Country | United States |
End: Central Avenue (-87.17615, 41.575874)
Estimated Travel Time
Distance: 251 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 05h 11m |
| 40 mph (64.37 km/h) | 03h 53m |
| 50 mph (80.47 km/h) | 03h 06m |
| 60 mph (96.56 km/h) | 02h 35m |
| 70 mph (112.65 km/h) | 02h 13m |
| 80 mph (129 km/h) | 01h 56m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $20.74 | $41.48 |
| Mid-grade | $4.25 | $23.39 | $46.78 |
| Premium | $4.65 | $25.60 | $51.19 |
| Diesel | $5.30 | $29.17 | $58.34 |
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 Indiana · May 07, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.