Traveling from Port Sulphur to Baton Rouge covers 127.6 miles and takes approximately 2 hours and 37 minutes of driving time. Since the entire journey remains within the Southeast region of Louisiana, you can easily complete this trip in a single day without needing an overnight stay. Expect to spend roughly $20 on fuel for the trek, which relies heavily on LA 23, the Behrman Highway, and the Pontchartrain Expressway. This route is designed for efficiency rather than leisure, making it a straightforward connection between the lower river parishes and the state capital. It serves as a practical link for those needing to move between these two points quickly.
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
63.8 miles from Port Sulphur, LA
A natural place for your longest stop of the day
, about 1h 23m into the drive
.
Main Roads
Road
Distance
Duration
Pontchartrain Expressway
80.6 mi
1h 32m
LA 23
39.8 mi
52m
Behrman Highway
2.3 mi
4m
General de Gaulle Drive
1.2 mi
2m
Westbank Expressway
0.9 mi
1m
Behrman Place
0.7 mi
1m
Crescent City Connection
0.6 mi
<1m
Government Street
0.6 mi
1m
Longest stretch:
Pontchartrain Expressway
— 80.6 mi, about 1h 32m
Turn-by-Turn Driving Directions
Step-by-step road directions between Port Sulphur, LA and Baton Rouge, LA.
1
Start on LA 23
40 mi·52 min·LA 23
2
Turn right onto LA 428
2.3 mi·4 min·Behrman Highway
3
Turn straight onto LA 428
0.4 mi·36 sec·Behrman Place
4
Keep slight left at fork onto LA 428
0.3 mi·45 sec·Behrman Place
5
At end of road, turn left onto LA 428
1.2 mi·2 min·General de Gaulle Drive
6
Take the ramp
0.4 mi·42 sec
Toward US 90 Business East: New Orleans
7
Merge onto US 90 BUS
0.9 mi·1 min·Westbank Expressway
8
Continue on US 90 BUS
0.6 mi·57 sec·Crescent City Connection
9
Continue on US 90 BUS
81 mi·1 hr 32 min·Pontchartrain Expressway
Use the straight / slight right lanes.
10
Keep slight right at fork onto I 110
0.4 mi·29 sec·Martin Luther King Jr Memorial Freeway
Toward I 110 North: Downtown, Metro AirportUse the straight / slight right lanes.
11
Take the exit
0.2 mi·37 sec
Exit 1AToward LA 73: Government Street, River Center, DowntownUse the straight / slight right lanes.
12
Turn left onto LA 73
0.6 mi·1 min·Government Street
Use the left / straight / right lanes.
13
Arrive at destination
Government Street
Trip Plan
Because this drive takes under three hours, you have plenty of flexibility in your departure schedule to avoid peak traffic. Plan for at least one stop to break up the 127.6-mile journey, as this will help keep you alert during the long, 80.6-mile stint on the Pontchartrain Expressway. Since fuel costs for the trip hover around $20, it is wise to top off your tank before leaving Port Sulphur to avoid paying premium prices along the main highway corridors. Keep a close eye on your GPS as you transition between LA 23 and the local highways to ensure you stay on the most direct path. Taking advantage of the single recommended stop will make the transition from the coastal region to Baton Rouge much more comfortable.
Morning Departure
Leave by 9 AM and you'll arrive before lunch.
Evening Departure
Even a 4 PM departure gets you there before dark in summer.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 63.8 miles from Port Sulphur, LA, or about 1h 23m into the drive.
The longest continuous stretch on this route runs about 80.6 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 28 miles or 36m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 63.8 miles or 1h 23m 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 10m
Traffic, exits, and arrival timing usually matter more near Baton Rouge, LA than in the middle of the route.
Before You Leave
+
Open the route before leaving Port Sulphur, LA 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 Port Sulphur, LA
This is one driving day of about 127.6 miles and 2h 37m.
Your first comfortable stop window is around 28 miles from Port Sulphur, LA.
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 Pontchartrain Expressway for about 80.6 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 7
5 decision points cluster between mile 42.4 and 127.1 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
4
42.4 mi into trip|~57m in|LA 428 / Behrman Place
Keep slight left at fork onto LA 428 / Behrman Place
Highway fork - watch signs carefully
4
42.7 mi into trip|~57m in|LA 428 / General de Gaulle Drive
At end of road, turn left onto LA 428 / General de Gaulle Drive
Navigation decision point
8
126.5 mi into trip|~2h 35m in|I 110 / Martin Luther King Jr Memorial Freeway
Keep slight right at fork onto I 110 / Martin Luther King Jr Memorial Freeway toward I 110 North: Downtown, Metro Airport
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Toward I 110 North: Downtown, Metro Airport
8
126.9 mi into trip|~2h 35m in
Take the exit toward LA 73: Government Street, River Center, Downtown
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.
Exit 1A
Toward LA 73: Government Street, River Center,...
4
127.1 mi into trip|~2h 36m in|LA 73 / Government Street
Turn left onto LA 73 / Government Street
Lane positioning matters here
Use the left / straight / right lanes.
Fuel & Cost
Regular Gas
$19.27 one way
$38.54 round trip
$3.84/gal25.4 MPG avg45 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.21
$21.15
$42.31
premium
$4.56
$22.90
$45.81
diesel
$5.61
$28.17
$56.34
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$19
Meals
$25–$50
Total
$44–$69
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 44.6 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $13 in charging
· 0 stops
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
38.3
0
$13.40
$6.12
Efficient EV
31.9
0
$11.17
$5.10
EV Truck/SUV
51
0
$17.86
$8.17
Gas CO2
45 kg
EV CO2
15 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 Apr 12, 2026
Origin
Port Sulphur, LA
Morning
in Port Sulphur on Sunday
Local time
8:23 AM
CDT
Current temp
64°F
Mostly Clear
SE 5 mph0% chanceLive forecast
Destination
Baton Rouge, LA
Morning
in Baton Rouge on Sunday
Local time
8:23 AM
CDT
Current temp
83°F
Unavailable
Live forecast
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
19 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
2h 37m 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.
National Parks Near This Route
Worth a detour if your schedule allows.
New Orleans Jazz National Historical Park
National Historical Park
Discover the roots of jazz at the New Orleans Jazz National Historical Park. Located in the heart of the French Quarter, our park offers live performances, exhibits, and programs that celebrate the le...
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
This highway-focused drive keeps you on high-speed roads for 95% of the trip. You will spend the bulk of your time navigating the Pontchartrain Expressway, which accounts for the longest uninterrupted stretch of 80.6 miles. The transition from the rural feel of LA 23 to the more structured, high-capacity lanes of the expressway defines the character of the journey. Behind the wheel, you should prepare for a consistent, fast-paced experience that prioritizes direct travel over winding secondary roads. Expect a steady, predictable pace as you move through the Southeast Louisiana corridor.
95% highway — fuel and pacing are the main things to plan.
13 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 80.6 mi on Pontchartrain Expressway.
How Hard Is This Drive?
4/10
This is a straightforward highway drive that stays mostly on Pontchartrain Expressway and LA 23. There are only a few real navigation decisions along the way. The trickiest moment comes around 42.4 miles in near LA 428 / Behrman Place.
Driving Effort4/10
Easy - simple navigation with a manageable amount of wheel time
Balances navigation complexity with total wheel time.
This is a straightforward 2h 37m drive. You will face about 7 decision points, but nothing that requires special attention if you follow navigation.
Where does it get tricky?
The main spots that need attention: at 42.4 miles (LA 428 / Behrman Place): Highway fork - watch signs carefully; at 42.7 miles (LA 428 / General de Gaulle Drive): Navigation decision point; at 126.5 miles (I 110 / Martin Luther King Jr Memorial Freeway): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Baton Rouge is the capital of Louisiana, USA. Located on the east bank of the mighty Mississippi River, Baton Rouge is Louisiana's second largest city, home of Louisiana State University, major port facilities, and a variety of attractions.
The longest stretch is about 80.6 miles on Pontchartrain Expressway. The full list of main roads is in the Roads section above.
Yes, with realistic expectations. Build in a stop roughly every 2 hours, have snacks and activities ready, and check the Nearby Places tabs for kid-friendly stops along the way.
The main spots that need attention: at 42.4 miles (LA 428 / Behrman Place): Highway fork - watch signs carefully; at 42.7 miles (LA 428 / General de Gaulle Drive): Navigation decision point; at 126.5 miles (I 110 / Martin Luther King Jr Memorial Freeway): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Yes — New Orleans Jazz National Historical Park. See the National Parks section for detour distances and tips on detours.
Yes. A round trip is manageable in a single day if you plan a break at Baton Rouge, LA before heading back.
