How far is Union, MS from Biloxi, MS?
The driving distance from Union, MS to Biloxi, MS is about 177.8 miles (286.1 km), with a travel time of about 03h 06m by car.
- The straight-line flight distance is about 150.9 miles (242.9 km).
- For a round trip, plan for roughly 06h 13m 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 06m.
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 Clear
Driving Route Map
The map below follows the saved road route between Union and Biloxi.
Turn-by-Turn Driving Directions
Step-by-step road directions between Union and Biloxi.
-
1
Start on Main Street
11 m · 6 sec · Main Street
-
2
Continue on Main Street
1090 ft · 28 sec · Main Street
-
3
Turn right onto Jackson Road
1.4 km · 2 min · Jackson Road
-
4
Turn right
68.6 mi · 1 hr 42 min
-
5
Take the exit slight right
1634 ft · 40 sec
-
6
Merge slight left onto Lance Corporal Roy M Wheat Memorial Highway
34.8 mi · 38 min · Lance Corporal Roy M Wheat Memorial Highway
-
7
Take the exit slight right toward US 98 East: Lucedale, Mobile
3.2 mi · 4 min
-
8
Take the exit slight right toward US 49: Wiggins, Gulfport, Mississippi Gulf Coast
1558 ft · 44 sec
-
9
Keep slight left to continue on Multi Purpose Center, Hattiesburg
833 ft · 28 sec
-
10
Turn right
41.9 mi · 49 min
-
11
Take the exit slight right toward MS 67 South: D'Iberville, Biloxi
1.2 km · 1 min
-
12
Continue on Biloxi-D'Iberville Scenic Expressway
20.5 mi · 24 min · Biloxi-D'Iberville Scenic Expressway
-
13
Continue straight
3.2 mi · 4 min
-
14
Take the exit slight right toward Division Street
1852 ft · 47 sec
-
15
Turn left onto Division Street
3090 ft · 2 min · Division Street
-
16
Turn right onto Main Street
2572 ft · 1 min · Main Street
-
17
Turn left onto Howard Avenue
28 m · 3 sec · Howard Avenue
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18
Arrive at your destination
0 m · 1 sec · Howard Avenue
Car Route Details
A richer read on the saved driving route between Union and Biloxi.
Interchange-aware route
The drive includes several ramps, exits, or merges, so checking the next few maneuvers before busy interchanges is useful.
Longest stretch
Turn right
68.6 mi · 01h 42m
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 Sunny leaving Union and Mostly Clear near Biloxi.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Union to Biloxi?
The road trip is about 177.8 miles (286.1 km) and usually takes 03h 06m 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 88.2 miles from Union and 89.5 miles from Biloxi.
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 26.9 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 10:46 AM CST.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $23.53 one way or $47.05 round trip. Estimated CO2 is about 55.7 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Union and Mostly Clear 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 Union and Biloxi. Straight-line distance: 150.96 mi (242.94 km).
#1 Union
Union is a place in Mississippi, United States.
| Population | 0 |
| Coordinates | 32.5715300, -89.1214500 |
| Altitude | 147 |
| 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: 286 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 05h 55m |
| 40 mph (64.37 km/h) | 04h 26m |
| 50 mph (80.47 km/h) | 03h 33m |
| 60 mph (96.56 km/h) | 02h 57m |
| 70 mph (112.65 km/h) | 02h 32m |
| 80 mph (129 km/h) | 02h 13m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.75 | $23.53 | $47.05 |
| Mid-grade | $4.22 | $26.47 | $52.94 |
| Premium | $4.62 | $28.97 | $57.93 |
| Diesel | $5.82 | $36.47 | $72.93 |
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