How far is Decatur, IN from Seymour, IN?
The driving distance from Decatur, IN to Seymour, IN is about 177.5 miles (285.6 km), with a travel time of about 03h 30m by car.
- The straight-line flight distance is about 139 miles (223.7 km).
- For a round trip, plan for roughly 07h 01m 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 03h 30m.
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.
Town in Fall Creek Township, Madison County, Indiana, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Showers And Thunderstorms
Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between Decatur and Seymour.
Turn-by-Turn Driving Directions
Step-by-step road directions between Decatur and Seymour.
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1
Start on West Monroe Street
2422 ft · 47 sec · West Monroe Street
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2
Turn left onto North 13th Street
12.6 mi · 14 min · North 13th Street
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3
Continue on South Harrison Street
15.1 mi · 17 min · South Harrison Street
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4
Turn right onto West Votaw Street
18.2 mi · 21 min · West Votaw Street
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5
Continue on West State Street
9.2 mi · 12 min · West State Street
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6
Turn right onto East McGalliard Road
10.2 mi · 16 min · East McGalliard Road
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7
Take the ramp left
1053 ft · 28 sec
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8
Merge slight left
39 mi · 42 min
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9
Keep slight right
1.6 km · 1 min
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10
Continue on I 465 South, I 69 South
15.4 mi · 18 min
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11
Take the exit slight right toward Emerson Avenue
1296 ft · 32 sec
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12
Keep slight left
1069 ft · 28 sec
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13
Turn straight onto South Emerson Avenue
2.6 mi · 4 min · South Emerson Avenue
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14
Turn right onto East Southport Road
2440 ft · 53 sec · East Southport Road
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15
Take the ramp left
1656 ft · 43 sec
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16
Merge slight left
47.5 mi · 51 min
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17
Take the exit slight right toward SR 11: Seymour, Jonesville
1131 ft · 1 min
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18
Enter the roundabout and take exit 1 toward the route
11 m · 2 sec
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19
Exit the roundabout
4.6 mi · 8 min
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20
Turn right onto East 2nd Street
770 ft · 34 sec · East 2nd Street
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21
Arrive at your destination
0 m · 1 sec · West 2nd Street
Car Route Details
A richer read on the saved driving route between Decatur and Seymour.
Interchange-aware route
The drive includes several ramps, exits, or merges, so checking the next few maneuvers before busy interchanges is useful.
East Southport Road
Merge slight left
47.5 mi · 00h 51m
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.
Showers And Thunderstorms leaving Decatur and Showers And Thunderstorms near Seymour.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Decatur to Seymour?
The road trip is about 177.5 miles (285.6 km) and usually takes 03h 30m 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?
Pendleton is a useful midpoint, sitting about 88.7 miles from Decatur and 88.7 miles from Seymour.
How much longer is the road route than the straight-line distance?
The direct path is about 139 miles (223.7 km), while the road route adds roughly 38.5 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 9:58 AM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $24.18 one way or $48.35 round trip. Estimated CO2 is about 55.6 kg one way.
What should you check before leaving?
Before you leave, expect Showers And Thunderstorms around Decatur and Showers And Thunderstorms near Seymour.
Stop Ideas Near Pendleton
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Daleville Town Hall Park and Splash Pad
Noblesville Housing Authority
McCordsville Town Hall
Thomas A. Weaver Municipal Complex
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Pendleton.
Indianapolis Union Station
Connersville station
Crawfordsville
Crawfordsville (Bus), Indiana
Flight Path Map
This map shows the direct air route between Decatur and Seymour. Straight-line distance: 138.98 mi (223.66 km).
#1 Decatur
City in Indiana, United States
| Population | 34,821 |
| Coordinates | 40.8306000, -84.9291300 |
| Altitude | 244 |
| Country | United States |
#2 Seymour
City in Indiana, United States
| Population | 20,096 |
| Coordinates | 38.9592200, -85.8902500 |
| Altitude | 184 |
| Country | United States |
End: Seymour (-85.89025, 38.95922)
Estimated Travel Time
Distance: 286 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 05h 54m |
| 40 mph (64.37 km/h) | 04h 26m |
| 50 mph (80.47 km/h) | 03h 32m |
| 60 mph (96.56 km/h) | 02h 57m |
| 70 mph (112.65 km/h) | 02h 32m |
| 80 mph (129 km/h) | 02h 12m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.86 | $24.18 | $48.35 |
| Mid-grade | $4.46 | $27.89 | $55.78 |
| Premium | $4.99 | $31.22 | $62.45 |
| Diesel | $6.62 | $41.45 | $82.89 |
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 · Oct 15, 2026