How far is Biloxi, MS from Union, MS?
The driving distance from Biloxi, MS to Union, MS is about 176.4 miles (283.9 km), with a travel time of about 03h 50m by car.
- The straight-line flight distance is about 150.9 miles (242.9 km).
- For a round trip, plan for roughly 07h 41m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM CST.
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 03h 50m.
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.
Suburb city of Hattiesburg, located in Forrest County, Mississippi
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Biloxi and Union.
Turn-by-Turn Driving Directions
Step-by-step road directions between Biloxi and Union.
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1
Start on Howard Avenue
28 m · 6 sec · Howard Avenue
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2
Turn right onto Main Street
2572 ft · 1 min · Main Street
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3
Turn left onto Division Street
2603 ft · 2 min · Division Street
-
4
Take the ramp right toward Bohn Street
42 m · 3 sec · Bohn Street
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5
Turn straight
1522 ft · 37 sec
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6
Merge slight left
3.1 mi · 4 min
-
7
Continue straight
20.7 mi · 24 min
-
8
Keep slight right to continue on US 49 North: Hattiesburg, Jackson
2209 ft · 47 sec
-
9
Merge slight left
39.8 mi · 47 min
-
10
Continue straight
2.4 mi · 3 min
-
11
Take the exit straight
1520 ft · 52 sec
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12
Merge slight left
2.5 mi · 3 min
-
13
Take the exit slight right toward I 59 North, US 98 West: Columbia, Laurel
1.3 km · 2 min
-
14
Merge slight left onto Lance Corporal Roy M Wheat Memorial Highway
35.1 mi · 38 min · Lance Corporal Roy M Wheat Memorial Highway
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15
Take the exit slight right toward West US 84, North MS 15: 16th Avenue
928 ft · 20 sec
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16
Keep slight left
46 m · 5 sec
-
17
Turn left onto South 16th Avenue
1.1 mi · 2 min · South 16th Avenue
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18
Continue on Highway 15 North
67.7 mi · 1 hr 41 min · Highway 15 North
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19
Turn left onto East Jackson Road
1.4 km · 2 min · East Jackson Road
-
20
Turn straight onto Main Street
1000 ft · 20 sec · Main Street
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21
Arrive at your destination
0 m · 1 sec · Main Street
Car Route Details
A richer read on the saved driving route between Biloxi and Union.
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 North
Continue on Highway 15 North
67.7 mi · 01h 41m
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.
Mostly Clear leaving Biloxi and Mostly Sunny near Union.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Biloxi to Union?
The road trip is about 176.4 miles (283.9 km) and usually takes 03h 50m 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?
Petal is a useful midpoint, sitting about 88.4 miles from Biloxi and 88 miles from Union.
How much longer is the road route than the straight-line distance?
The direct path is about 150.9 miles (242.9 km), while the road route adds roughly 25.5 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 CST. If you want a more comfortable same-day return, try to leave by 9:18 AM CST.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $23.34 one way or $46.67 round trip. Estimated CO2 is about 55.3 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Clear around Biloxi and Mostly Sunny near Union.
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 Biloxi and Union. Straight-line distance: 150.96 mi (242.94 km).
#1 Biloxi
The most populous city in Harrison County, Mississippi.
| Population | 46,127 |
| Coordinates | 30.3960300, -88.8853100 |
| Altitude | 6 |
| Country | United States |
#2 Union
Union is a place in Mississippi, United States.
| Population | 0 |
| Coordinates | 32.5715300, -89.1214500 |
| Altitude | 147 |
| Country | United States |
End: Union (-89.12145, 32.57153)
Estimated Travel Time
Distance: 284 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 05h 52m |
| 40 mph (64.37 km/h) | 04h 24m |
| 50 mph (80.47 km/h) | 03h 31m |
| 60 mph (96.56 km/h) | 02h 56m |
| 70 mph (112.65 km/h) | 02h 31m |
| 80 mph (129 km/h) | 02h 12m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.75 | $23.34 | $46.67 |
| Mid-grade | $4.22 | $26.26 | $52.52 |
| Premium | $4.62 | $28.74 | $57.47 |
| Diesel | $5.82 | $36.18 | $72.35 |
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 · Nov 05, 2026