How far is Grand Bay, AL from Decatur, AL?
The driving distance from Grand Bay, AL to Decatur, AL is about 364.1 miles (585.9 km), with a travel time of about 05h 25m by car.
- The straight-line flight distance is about 296.1 miles (476.5 km).
- For a round trip, plan for roughly 10h 50m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 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 05h 25m.
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.
The capital of Alabama.
Route Weather Snapshot
Check the forecast at both ends before you head out.
Partly Sunny then Chance Showers And Thunderstorms
Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between Grand Bay and Decatur.
Turn-by-Turn Driving Directions
Step-by-step road directions between Grand Bay and Decatur.
-
1
Start on Dezauche Lane
114 m · 23 sec · Dezauche Lane
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2
Turn left onto Potter Tract
120 m · 20 sec · Potter Tract
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3
Turn right onto Government Boulevard
632 ft · 19 sec · Government Boulevard
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4
Turn left onto Grand Bay Wilmer Road
1.3 mi · 2 min · Grand Bay Wilmer Road
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5
Take the ramp right
1248 ft · 30 sec
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6
Merge slight left
15.7 mi · 18 min
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7
Take the exit slight left toward I 65 North: Montgomery
3020 ft · 44 sec
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8
Continue straight
332.2 mi · 6 hr 2 min
-
9
Take the exit slight right toward 67: Decatur, Priceville, Somerville
2021 ft · 51 sec
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10
Turn left onto Point Mallard Parkway Southeast
4.5 mi · 7 min · Point Mallard Parkway Southeast
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11
Turn right onto 6th Avenue Southeast
3 mi · 6 min · 6th Avenue Southeast
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12
Continue on 6th Avenue Northeast
580 ft · 15 sec · 6th Avenue Northeast
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13
Turn left onto Lee Street Northeast
1085 ft · 38 sec · Lee Street Northeast
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14
Turn right
25 m · 6 sec
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15
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Grand Bay and Decatur.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
I 65 North
Continue straight
332 mi · 06h 02m
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.
Partly Sunny then Chance Showers And Thunderstorms leaving Grand Bay and Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms near Decatur.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Grand Bay to Decatur?
The road trip is about 364.1 miles (585.9 km) and usually takes 05h 25m 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?
Montgomery is a useful midpoint, sitting about 179.5 miles from Grand Bay and 184.6 miles from Decatur.
How much longer is the road route than the straight-line distance?
The direct path is about 296.1 miles (476.5 km), while the road route adds roughly 68 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 CDT. If you want a more comfortable same-day return, try to leave by 6:10 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $48.66 one way or $97.33 round trip. Estimated CO2 is about 114.2 kg one way.
What should you check before leaving?
Before you leave, expect Partly Sunny then Chance Showers And Thunderstorms around Grand Bay and Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms near Decatur.
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 Grand Bay and Decatur. Straight-line distance: 296.1 mi (476.52 km).
#1 Grand Bay
Census designated place
| Population | 3,672 |
| Coordinates | 30.4763100, -88.3422300 |
| Altitude | 25 |
| Country | United States |
#2 Decatur
The most populous city in Morgan County, Alabama.
| Population | 54,381 |
| Coordinates | 34.6059300, -86.9833400 |
| Altitude | 171 |
| Country | United States |
End: (-86.983514, 34.605804)
Estimated Travel Time
Distance: 586 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 12h 07m |
| 40 mph (64.37 km/h) | 09h 06m |
| 50 mph (80.47 km/h) | 07h 16m |
| 60 mph (96.56 km/h) | 06h 04m |
| 70 mph (112.65 km/h) | 05h 12m |
| 80 mph (129 km/h) | 04h 32m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.79 | $48.66 | $97.33 |
| Mid-grade | $4.26 | $54.73 | $109.46 |
| Premium | $4.63 | $59.43 | $118.86 |
| Diesel | $5.42 | $69.58 | $139.17 |
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 · May 31, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.