How far is Opelousas, LA from Marrero, LA?
The driving distance from Opelousas, LA to Marrero, LA is about 140.2 miles (225.7 km), with a travel time of about 02h 31m by car.
- The straight-line flight distance is about 126.1 miles (203 km).
- For a round trip, plan for roughly 05h 03m 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 31m.
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.
Town in West Carroll Parish, Louisiana
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Opelousas and Marrero.
Turn-by-Turn Driving Directions
Step-by-step road directions between Opelousas and Marrero.
-
1
Start on South Main Street
622 ft · 20 sec · South Main Street
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2
Turn left onto East Vine Street
50.4 mi · 1 hr 5 min · East Vine Street
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3
Keep slight right
3.6 mi · 5 min
-
4
Turn left onto I 10 East: Baton Rouge
1512 ft · 37 sec
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5
Merge slight left
78.6 mi · 1 hr 30 min
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6
Keep slight right to continue on Pontchartrain Expressway
3.5 mi · 4 min · Pontchartrain Expressway
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7
Keep slight left to continue on Pontchartrain Expressway
2.4 mi · 3 min · Pontchartrain Expressway
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8
Continue on Crescent City Connection
1.1 km · 1 min · Crescent City Connection
-
9
Continue on Westbank Expressway
5.4 mi · 7 min · Westbank Expressway
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10
Take the exit slight right toward LA 45: Barataria Boulevard
1395 ft · 30 sec
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11
Turn straight onto Westbank Expressway
1403 ft · 36 sec · Westbank Expressway
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12
Turn right onto Barataria Boulevard
1612 ft · 39 sec · Barataria Boulevard
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13
Arrive at your destination
0 m · 1 sec · Barataria Boulevard
Car Route Details
A richer read on the saved driving route between Opelousas and Marrero.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
I 10 East
Merge slight left
78.6 mi · 01h 30m
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.
Mostly Sunny leaving Opelousas and Mostly Sunny near Marrero.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Opelousas to Marrero?
The road trip is about 140.2 miles (225.7 km) and usually takes 02h 31m 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?
Oak Grove is a useful midpoint, sitting about 72.8 miles from Opelousas and 67.4 miles from Marrero.
How much longer is the road route than the straight-line distance?
The direct path is about 126.1 miles (203 km), while the road route adds roughly 14.1 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 1:26 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $18.75 one way or $37.49 round trip. Estimated CO2 is about 44 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Opelousas and Mostly Sunny near Marrero.
Stop Ideas Near Oak Grove
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Port Vincent Clerks Office
City of Donaldsonville
City of Baton Rouge Fire Station 15
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Oak Grove.
Baton Rouge, Louisiana
Hammond
Schriever
New Iberia
Flight Path Map
This map shows the direct air route between Opelousas and Marrero. Straight-line distance: 126.14 mi (203 km).
#1 Opelousas
Parish seat of St.
| Population | 15,562 |
| Coordinates | 30.5335300, -92.0815100 |
| Altitude | 20 |
| Country | United States |
#2 Marrero
CDP in Jefferson Parish, Louisiana
| Population | 33,141 |
| Coordinates | 29.8993700, -90.1003500 |
| Altitude | 1 |
| Country | United States |
End: Barataria Boulevard (-90.100445, 29.899359)
Estimated Travel Time
Distance: 226 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 04h 40m |
| 40 mph (64.37 km/h) | 03h 30m |
| 50 mph (80.47 km/h) | 02h 48m |
| 60 mph (96.56 km/h) | 02h 20m |
| 70 mph (112.65 km/h) | 02h 00m |
| 80 mph (129 km/h) | 01h 44m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.79 | $18.75 | $37.49 |
| Mid-grade | $4.26 | $21.08 | $42.16 |
| Premium | $4.63 | $22.89 | $45.79 |
| Diesel | $5.42 | $26.80 | $53.61 |
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 Louisiana · 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.