How far is Union, SC from Summerville, SC?
The driving distance from Union, SC to Summerville, SC is about 159.6 miles (256.8 km), with a travel time of about 03h 03m by car.
- The straight-line flight distance is about 143.7 miles (231.2 km).
- For a round trip, plan for roughly 06h 06m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM EDT.
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 03m.
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.
Human settlement in Lexington County, South Carolina, United States of America
Route Weather Snapshot
Check the forecast at both ends before you head out.
Clear
Driving Route Map
The map below follows the saved road route between Union and Summerville.
Turn-by-Turn Driving Directions
Step-by-step road directions between Union and Summerville.
-
1
Start on North Pinckney Street
1.3 mi · 2 min · North Pinckney Street
-
2
Continue on Whitmire Highway
15.2 mi · 17 min · Whitmire Highway
-
3
Turn slight left onto Watson Street
7.4 mi · 11 min · Watson Street
-
4
Keep slight right to continue on State Highway 121
6.1 mi · 9 min · State Highway 121
-
5
Take the ramp slight right
1191 ft · 29 sec
-
6
Merge slight left
36.2 mi · 40 min
-
7
Keep slight right to continue on Charleston
90.9 mi · 1 hr 39 min
-
8
Take the exit slight right toward US 17 Alternate South: Summerville
1450 ft · 35 sec
-
9
Turn straight onto North Main Street
2 mi · 3 min · North Main Street
-
10
Turn left onto East Richardson Avenue
35 m · 5 sec · East Richardson Avenue
-
11
Turn right
28 m · 7 sec
-
12
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Union and Summerville.
Straightforward drive
The saved road route has a manageable number of maneuvers and should be easy to follow with normal attention to signs.
Charleston
Keep slight right to continue on Charleston
90.9 mi · 01h 39m
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.
Sunny leaving Union and Clear near Summerville.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Union to Summerville?
The road trip is about 159.6 miles (256.8 km) and usually takes 03h 03m 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?
Gaston is a useful midpoint, sitting about 79.8 miles from Union and 79.7 miles from Summerville.
How much longer is the road route than the straight-line distance?
The direct path is about 143.7 miles (231.2 km), while the road route adds roughly 15.9 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 EDT. If you want a more comfortable same-day return, try to leave by 10:54 AM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $22.30 one way or $44.60 round trip. Estimated CO2 is about 50 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Union and Clear near Summerville.
Stop Ideas Near Gaston
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 Gaston.
Columbia
Denmark
Camden
Kingstree
Flight Path Map
This map shows the direct air route between Union and Summerville. Straight-line distance: 143.69 mi (231.25 km).
#1 Union
Township of Union County, New Jersey
| Population | 8,045 |
| Coordinates | 34.7154100, -81.6237100 |
| Altitude | 196 |
| Country | United States |
#2 Summerville
Town in South Carolina, United States
| Population | 53,301 |
| Coordinates | 33.0185000, -80.1756500 |
| Altitude | 27 |
| Country | United States |
End: Summerville (-80.17565, 33.0185)
Estimated Travel Time
Distance: 257 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 05h 19m |
| 40 mph (64.37 km/h) | 03h 59m |
| 50 mph (80.47 km/h) | 03h 11m |
| 60 mph (96.56 km/h) | 02h 39m |
| 70 mph (112.65 km/h) | 02h 16m |
| 80 mph (129 km/h) | 01h 59m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.96 | $22.30 | $44.60 |
| Mid-grade | $4.43 | $24.94 | $49.87 |
| Premium | $4.78 | $26.90 | $53.80 |
| Diesel | $5.62 | $31.66 | $63.33 |
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 South Carolina · Apr 23, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.