How far is Decatur, MS from Biloxi, MS?
The driving distance from Decatur, MS to Biloxi, MS is about 168.1 miles (270.6 km), with a travel time of about 02h 53m by car.
- The straight-line flight distance is about 141.8 miles (228.2 km).
- For a round trip, plan for roughly 05h 46m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM CDT.
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 53m.
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.
Suburb city of Hattiesburg, located in Forrest County, Mississippi
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Driving Route Map
The map below follows the saved road route between Decatur and Biloxi.
Turn-by-Turn Driving Directions
Step-by-step road directions between Decatur and Biloxi.
-
1
Start on West Broad Street
145 m · 23 sec · West Broad Street
-
2
Turn right onto Highway 15
58.2 mi · 1 hr 27 min · Highway 15
-
3
Continue on North 16th Avenue
1.5 km · 1 min · North 16th Avenue
-
4
Take the exit slight right
1634 ft · 40 sec
-
5
Merge slight left onto Lance Corporal Roy M Wheat Memorial Highway
34.8 mi · 38 min · Lance Corporal Roy M Wheat Memorial Highway
-
6
Take the exit slight right toward US 98 East: Lucedale, Mobile
3.2 mi · 4 min
-
7
Take the exit slight right toward US 49: Wiggins, Gulfport, Mississippi Gulf Coast
1558 ft · 44 sec
-
8
Keep slight left to continue on Multi Purpose Center, Hattiesburg
833 ft · 28 sec
-
9
Turn right
41.9 mi · 49 min
-
10
Take the exit slight right toward MS 67 South: D'Iberville, Biloxi
1.2 km · 1 min
-
11
Continue on Biloxi-D'Iberville Scenic Expressway
20.5 mi · 24 min · Biloxi-D'Iberville Scenic Expressway
-
12
Continue straight
3.2 mi · 4 min
-
13
Take the exit slight right toward Division Street
1852 ft · 47 sec
-
14
Turn left onto Division Street
3090 ft · 2 min · Division Street
-
15
Turn right onto Main Street
2572 ft · 1 min · Main Street
-
16
Turn left onto Howard Avenue
28 m · 3 sec · Howard Avenue
-
17
Arrive at your destination
0 m · 1 sec · Howard Avenue
Car Route Details
A richer read on the saved driving route between Decatur and Biloxi.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Highway 15
Turn right onto Highway 15
58.2 mi · 01h 27m
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.
Sunny leaving Decatur and Sunny near Biloxi.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Decatur to Biloxi?
The road trip is about 168.1 miles (270.6 km) and usually takes 02h 53m 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?
Petal is a useful midpoint, sitting about 83 miles from Decatur and 85.1 miles from Biloxi.
How much longer is the road route than the straight-line distance?
The direct path is about 141.8 miles (228.2 km), while the road route adds roughly 26.3 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 CDT. If you want a more comfortable same-day return, try to leave by 12:44 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $22.46 one way or $44.91 round trip. Estimated CO2 is about 52.7 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Decatur and Sunny near Biloxi.
Stop Ideas Near Petal
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 Petal.
Hattiesburg station
Hattiesburg, MS
Laurel station
Picayune
Flight Path Map
This map shows the direct air route between Decatur and Biloxi. Straight-line distance: 141.77 mi (228.16 km).
#1 Decatur
Town in Newton County, Mississippi, United States
| Population | 1,733 |
| Coordinates | 32.4390300, -89.1083900 |
| Altitude | 131 |
| Country | United States |
#2 Biloxi
The most populous city in Harrison County, Mississippi.
| Population | 46,127 |
| Coordinates | 30.3960300, -88.8853100 |
| Altitude | 6 |
| Country | United States |
End: Howard Avenue (-88.885301, 30.396075)
Estimated Travel Time
Distance: 271 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 05h 36m |
| 40 mph (64.37 km/h) | 04h 12m |
| 50 mph (80.47 km/h) | 03h 21m |
| 60 mph (96.56 km/h) | 02h 48m |
| 70 mph (112.65 km/h) | 02h 24m |
| 80 mph (129 km/h) | 02h 05m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.79 | $22.46 | $44.91 |
| Mid-grade | $4.26 | $25.26 | $50.51 |
| Premium | $4.63 | $27.43 | $54.85 |
| Diesel | $5.42 | $32.11 | $64.22 |
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 Mississippi · Apr 23, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.