How far is Decatur, AL from Semmes, AL?
The driving distance from Decatur, AL to Semmes, AL is about 340.6 miles (548.2 km), with a travel time of about 06h 21m by car.
- The straight-line flight distance is about 274.6 miles (442 km).
- For a round trip, plan for roughly 12h 43m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 7:30 AM CDT.
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 06h 21m.
Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
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.
The capital of Alabama.
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Partly Sunny
Driving Route Map
The map below follows the saved road route between Decatur and Semmes.
Turn-by-Turn Driving Directions
Step-by-step road directions between Decatur and Semmes.
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1
Start on the route
130 m · 37 sec
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2
At the end of the road, turn left onto Ferry Street Northeast
50 m · 9 sec · Ferry Street Northeast
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3
Turn left onto Lee Street Northeast
1583 ft · 53 sec · Lee Street Northeast
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4
At the end of the road, turn right onto 6th Avenue Northeast
580 ft · 15 sec · 6th Avenue Northeast
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5
Continue on 6th Avenue Southeast
3 mi · 6 min · 6th Avenue Southeast
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6
Turn left onto Point Mallard Parkway
4.2 mi · 6 min · Point Mallard Parkway
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7
Take the ramp slight right toward I-65 South: Birmingham
1944 ft · 47 sec
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8
Merge slight left
67.1 mi · 1 hr 12 min
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9
Take the exit slight right toward I 22 West, US 31: Memphis, Fultondale
2715 ft · 38 sec
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10
Keep slight left to continue on I 22 West: Memphis
2666 ft · 38 sec
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11
Keep slight left to continue on Montgomery
1940 ft · 28 sec
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12
Merge slight left
251.1 mi · 4 hr 34 min
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13
Take the exit slight right toward SR 158: Industrial Parkway
1763 ft · 43 sec
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14
Keep slight right
60 m · 6 sec
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15
Merge slight left onto Industrial Parkway
7.1 mi · 9 min · Industrial Parkway
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16
Turn left onto Newburn Road
1.6 km · 2 min · Newburn Road
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17
Continue on Schillinger Road North
2.1 mi · 3 min · Schillinger Road North
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18
Turn right
42 m · 5 sec
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19
Turn right onto Moffett Road
2.3 mi · 4 min · Moffett Road
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20
Turn left onto Wulff Road
67 m · 10 sec · Wulff Road
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21
Turn right
15 m · 6 sec
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22
Turn right
27 m · 6 sec
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23
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Decatur and Semmes.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
Montgomery
Merge slight left
251 mi · 04h 34m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
Better with a longer stop
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
Mostly Sunny leaving Decatur and Partly Sunny near Semmes.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Decatur to Semmes?
The road trip is about 340.6 miles (548.2 km) and usually takes 06h 21m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
What is the halfway point on this route?
Montgomery is a useful midpoint, sitting about 170.5 miles from Decatur and 170.1 miles from Semmes.
How much longer is the road route than the straight-line distance?
The direct path is about 274.6 miles (442 km), while the road route adds roughly 66 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 7:30 AM CDT. Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $45.52 one way or $91.04 round trip. Estimated CO2 is about 106.8 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Decatur and Partly Sunny near Semmes.
Stop Ideas Near Montgomery
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 Montgomery.
Montgomery, AL
Selma, AL
Marion, AL
Camden, AL
Flight Path Map
This map shows the direct air route between Decatur and Semmes. Straight-line distance: 274.66 mi (442.03 km).
#1 Decatur
The most populous city in Morgan County, Alabama.
| Population | 54,381 |
| Coordinates | 34.6059300, -86.9833400 |
| Altitude | 171 |
| Country | United States |
#2 Semmes
City in Mobile County, Alabama, United States
| Population | 5,736 |
| Coordinates | 30.7782400, -88.2591700 |
| Altitude | 75 |
| Country | United States |
End: Semmes (-88.25917, 30.77824)
Estimated Travel Time
Distance: 548 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 11h 20m |
| 40 mph (64.37 km/h) | 08h 30m |
| 50 mph (80.47 km/h) | 06h 48m |
| 60 mph (96.56 km/h) | 05h 40m |
| 70 mph (112.65 km/h) | 04h 51m |
| 80 mph (129 km/h) | 04h 14m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.79 | $45.52 | $91.04 |
| Mid-grade | $4.26 | $51.19 | $102.39 |
| Premium | $4.63 | $55.59 | $111.19 |
| Diesel | $5.42 | $65.09 | $130.18 |
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 Alabama · Apr 16, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.