Biloxi to Decatur is 166 miles and takes about 3 hours 35 minutes via Highway 15 North, with a fuel budget near $25 and enough daylight to finish in a day. This trip stays within Mississippi, moving from the Southeast region to another part of the Southeast. Given its relatively short distance and mostly highway profile, this route is a straightforward drive. It's a good option if you're looking for a direct connection between these two points without extensive planning.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Break Rhythm
1 planned break
A short stop every 2 to 3 hours is enough for this drive.
Midpoint
83 miles from Biloxi, MS
A natural place for your longest stop of the day
, about 1h 40m into the drive
.
Main Roads
Road
Distance
Duration
Highway 15 North
58.2 mi
1h 26m
US 49
42.2 mi
49m
Lance Corporal Roy M Wheat Memorial Highway
35.1 mi
37m
MS 15
20.7 mi
24m
US 98
3.3 mi
4m
I 110
3.1 mi
4m
South 16th Avenue
1.1 mi
1m
Division Street
0.5 mi
1m
Longest stretch:
Highway 15 North
— 58.2 mi, about 1h 26m
Traffic on I-59
Hour-of-day weekday pattern from 16 FHWA count stations on your route.
Peak
5 PM
~1,194 veh/hr typical
· worst 1,412
Quietest
2 AM
~99 veh/hr
Peak-to-quiet ratio
12.1×
busier at peak than in the quiet hours
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Averaged across 103 weeks of 2023 FHWA Travel Monitoring Analysis System data. Weekday hours only (Mon–Fri).
Turn-by-Turn Driving Directions
Step-by-step road directions between Biloxi, MS and Decatur, MS.
1
Start on Howard Avenue
91 ft·6 sec·Howard Avenue
2
Turn right onto Main Street
0.5 mi·1 min·Main Street
3
Turn left onto Division Street
0.5 mi·1 min·Division Street
4
Take the ramp onto Bohn Street
139 ft·3 sec·Bohn Street
5
Turn straight
0.3 mi·37 sec
6
Merge onto I 110
3.1 mi·4 min·I 110
7
Continue on MS 15; MS 67
21 mi·24 min·MS 15; MS 67
Use the straight lane.
8
Keep slight right at fork
0.4 mi·47 sec
Toward US 49 North: Hattiesburg, Jackson
9
Merge onto US 49
40 mi·46 min·US 49
Use the straight lane.
10
Continue on US 49
2.4 mi·2 min·US 49
Use the straight / slight right lanes.
11
Take the exit
0.3 mi·51 sec
12
Merge onto US 98
2.5 mi·2 min·US 98
Use the straight / slight right lanes.
13
Take the exit onto US 98
0.8 mi·1 min·US 98
Toward I 59 North, US 98 West: Columbia, LaurelUse the straight / slight right lanes.
14
Merge onto I 59; US 98
35 mi·37 min·Lance Corporal Roy M Wheat Memorial Highway
Use the straight / slight right lanes.
15
Take the exit
0.2 mi·19 sec
Toward West US 84, North MS 15: 16th AvenueUse the slight right lane.
16
Keep slight left at fork
151 ft·5 sec
Use the left lane.
17
Turn left onto South 16th Avenue
1.1 mi·1 min·South 16th Avenue
Use the left lane.
18
Continue on MS 15
58 mi·1 hr 26 min·Highway 15 North
19
Turn left onto West Broad Street
474 ft·20 sec·West Broad Street
20
Arrive at destination
West Broad Street
Trip Plan
For this 3 hour 35 minute drive, leaving in the morning allows you ample time to reach Decatur comfortably. With only one recommended stop, you have flexibility in planning breaks. Keep an eye on your fuel levels, as the estimated cost is around $25 for the 166 miles. Since this is a shorter, single-day trip, you can easily depart at your convenience. A good tip for this route is to check your GPS for any potential slowdowns on Highway 15 North, as it's your primary road for over half the drive.
Morning Departure
An early start around 7-8 AM gets you there with plenty of daylight left.
Evening Departure
A late afternoon start means arriving after dark. Morning is better.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 83 miles from Biloxi, MS, or about 1h 40m into the drive.
The longest continuous stretch on this route runs about 58.2 miles.
This is a comfortable same-day trip.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 37 miles or 46m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 83 miles or 1h 40m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 2h 50m
Traffic, exits, and arrival timing usually matter more near Decatur, MS than in the middle of the route.
Before You Leave
+
Open the route before leaving Biloxi, MS so your first major turns are already loaded.
+
Leave with enough water and a charging cable within reach, not packed away.
+
Check your fuel range against the first long segment, especially if you are starting outside city service areas.
Day 1
Settle into the route from Biloxi, MS
This is one driving day of about 166 miles and 3h 35m.
Your first comfortable stop window is around 37 miles from Biloxi, MS.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 1 real break rather than only quick fuel stops.
The longest stretch is on Highway 15 North for about 58.2 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Place data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 14
5 decision points cluster between mile 25.1 and 106.5 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
6
25.1 mi into trip|~32m in
Keep slight right at fork toward US 49 North: Hattiesburg, Jackson
Highway fork - watch signs carefully. Multiple destination signs - pick the right one
Toward US 49 North: Hattiesburg, Jackson
5
25.5 mi into trip|~33m in|US 49
Merge onto US 49
Merge point - match speed before joining. Lane positioning matters here
Use the straight lane.
7
70.4 mi into trip|~1h 26m in|US 98
Take the exit onto US 98 toward I 59 North, US 98 West: Columbia, Laurel
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Toward I 59 North, US 98 West: Columbia, Laurel
7
106.3 mi into trip|~2h 5m in
Take the exit toward West US 84, North MS 15: 16th Avenue
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Toward West US 84, North MS 15: 16th Avenue
7
106.5 mi into trip|~2h 6m in
Keep slight left at fork
Highway fork - watch signs carefully. Lane positioning matters here
Use the left lane.
Fuel & Cost
Regular Gas
$24.32 one way
$48.64 round trip
$3.72/gal25.4 MPG avg58 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.13
$27.00
$54.00
premium
$4.49
$29.32
$58.64
diesel
$5.60
$36.59
$73.18
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$24
Meals
$25–$50
Total
$49–$74
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 58.1 kg one way.
Prices: EIA weekly data, 2026-08-31.
Driving Electric?
About $17 in charging
· 0 stops
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
49.8
0
$17.43
$7.97
Efficient EV
41.5
0
$14.53
$6.64
EV Truck/SUV
66.4
0
$23.24
$10.62
Gas CO2
58 kg
EV CO2
19 kg (67% less)
This trip is well within single-charge range for most EVs. No charging stops needed if you start fully charged.
DC fast charging avg $0.35/kWh. Home charging avg $0.16/kWh. US grid CO2: 0.39 kg/kWh.
Travel Intel
Current conditions at both ends of the drive.
Forecast as of Aug 21, 2026
Origin
Biloxi, MS
Late night
in Biloxi on Friday
Local time
5:45 AM
CDT
Current temp
93°F
Mostly Sunny then Chance Showers And Thunderstorms
SW 5 to 10 mph26% chanceLive forecast
Heat Advisory
Heat Advisory issued August 21 at 11:18AM CDT until August 21 at 8:00PM CDT by NWS Memphis TN
Extreme Heat Warning
Extreme Heat Warning issued August 21 at 10:50AM CDT until August 21 at 8:00PM CDT by NWS New Orleans LA
Destination
Decatur, MS
Late night
in Decatur on Friday
Local time
5:45 AM
CDT
Current temp
98°F
Mostly Sunny then Slight Chance Showers And Thunderstorms
WNW 5 mph24% chanceLive forecast
Heat Advisory
Heat Advisory issued August 21 at 11:18AM CDT until August 21 at 8:00PM CDT by NWS Memphis TN
Extreme Heat Warning
Extreme Heat Warning issued August 21 at 10:50AM CDT until August 21 at 8:00PM CDT by NWS New Orleans LA
72°F
Ellisville, MS
83 mi in
Seasonal Notes
Summer travel usually means heavier construction, hotter rest stops, and busier weekend traffic around major cities.
Winter travel shortens daylight, so a route that looks manageable on paper can feel much longer after dark.
Holiday weekends tend to make both departure and arrival windows slower than the raw route time suggests.
Time zone
Same local time
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
Temperature spread
5 degrees warmer at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
3h 35m on the road
The weather snapshot is not static. If you are leaving later, give both cities one more quick forecast check before departure.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
More Details
What kind of drive is this?
You'll spend about 77% of this 166-mile drive on highways. The longest continuous stretch on a highway is 58.2 miles, primarily on Highway 15 North. After this, expect to transition to surface roads for the remainder of your trip. The presence of many exits and merges is characteristic of the highway portions.
77% highway — fuel and pacing are the main things to plan.
20 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 58.2 mi on Highway 15 North.
How Hard Is This Drive?
9/10
This is a straightforward highway drive that stays mostly on Highway 15 North and US 49. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 25.1 miles in.
Driving Effort9/10
High effort - long or complex enough to need steady focus all day
Balances navigation complexity with total wheel time.
This is a demanding drive. With 14 significant decision points across 166 miles, you will need to stay alert - especially through interchange areas and urban stretches. Consider splitting it into segments if you are not comfortable with fast highway navigation.
Where does it get tricky?
The main spots that need attention: at 25.1 miles: Highway fork - watch signs carefully. Multiple destination signs - pick the right one; at 25.5 miles (US 49): Merge point - match speed before joining. Lane positioning matters here; at 70.4 miles (US 98): Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
Elevation Profile
Mostly flat terrain
434 ft20 ft
Total Climb
671 ft
Total Descent
257 ft
Highest Point
434 ft
~166 mi in
Elevation Range
414 ft
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Biloxi, MS and Decatur, MS, road signs point toward Jackson and Laurel.
Biloxi is a city in Harrison County, on the Gulf Coast of Mississippi. It's well known for its beaches and nine casinos. It is also home to the "Jefferson Davis Presidential Library and Museum", which serves as a museum of the Confederacy.
Top landmarks
•Jefferson Davis Presidential Library and Museum — presidential library and museum for Confederate States President Jefferson Davis...
•Beauvoir — post-war home of the former President of the Confederate States of America, Jeff...
•Biloxi Light — lighthouse in Mississippi, United States
Doable as a same-day drive at 3h 35m. Total distance: 166 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
3h 35m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (77%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 58.2 miles on Highway 15 North. The full list of main roads is in the Roads section above.
We did not find dedicated rest areas on this route. For a drive this long, plan bathroom and stretch breaks around gas stations, fast-food stops, or small-town downtowns — check the Nearby Places section for options.
It helps. This route has a higher-than-average number of complex decision points, which get harder in the dark. If the last hour of the trip is on surface roads or mountain grades, aim to arrive at Decatur, MS before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.
Only with planning. This is a long drive for kids — consider splitting it into two days rather than pushing through. Plan at least 1 meaningful breaks. Dedicated rest areas are limited, so plan gas or food stops as your bathroom breaks.
The main spots that need attention: at 25.1 miles: Highway fork - watch signs carefully. Multiple destination signs - pick the right one; at 25.5 miles (US 49): Merge point - match speed before joining. Lane positioning matters here; at 70.4 miles (US 98): Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
Possible but tiring. At 3.6 hours each way, an in-and-out day trip would put you behind the wheel for 7.2 hours — manageable with a long break at Decatur, MS, but most travelers stay overnight.
