Origin
Hilton Head Island, SC
Morning in Hilton Head Island on Saturday
Local time
8:11 AM
EDT
Current temp
81°F
Unavailable
Live forecast
Trip from Hilton Head Island, SC to Johnston, SC
Compiled and reviewed by the Trip.ovh planning team at COD Solutions Oy · Last reviewed Apr 18, 2026 · Editorial standards
Drive Time
3h 51m
Distance
154.2 mi
248 km
Drive Score
8/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$24
one way
EV Charging
Unknown
Best Time to Leave
4 AM
3h 39m
★
6 AM
3h 52m
8 AM
4h 17m
10 AM
4h 1m
12 PM
3h 58m
3 PM
4h 2m
5 PM
4h 16m
8 PM
3h 44m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Hilton Head Island, SC
Wikimedia Commons
Johnston, SC
Junior Bastos
Trip Overview
Hilton Head Island, SC to Johnston, SC is 154.2 miles and takes about 3h 51m via Grays Highway and US 278, with a fuel budget near $24 and enough daylight to finish in a day. This trip stays within South Carolina, moving from the Southeast coast inland. Expect a local drive with frequent turns rather than a fast-paced highway cruise. With a drive time under four hours, this route is well-suited for a single-day excursion. You'll want to be prepared for more engaged driving due to the road's character.
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
77.1 miles from Hilton Head Island, SC
A natural place for your longest stop of the day , about 1h 53m into the drive .
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 3h 51m. Total distance: 154.2 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
3h 51m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (14%). Some complex stretches to watch for.
Scenic Drive
Turn-heavy local drive route profile.
Drive Character
This drive is characterized by its 'turn-heavy local drive' profile, with only 14% of the journey on highways. You'll spend most of your time navigating local roads, including Grays Highway and Old Barnwell Road. The longest uninterrupted stretch you'll encounter is 17.2 miles on Grays Highway, so anticipate frequent adjustments and intersections. This isn't a route for autopilot; expect a more hands-on driving experience as you transition between different local routes.
This route has more turning and local-road decision points than a simple highway run.
There are about 47 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
Grays Highway is the longest continuous segment at about 17.2 miles.
How Hard Is This Drive?
Expect a hands-on drive with frequent turns and local roads rather than long highway stretches. You will hit about 25 points where you need to pay attention to lane position or signs. The trickiest moment comes around 2.4 miles in.
Driving Effort
5/10
Moderate - straightforward overall, but long enough or busy enough to require pacing
Balances navigation complexity with total wheel time.
This drive requires moderate attention. Across 154.2 miles you will encounter 25 spots where lane choice or exit timing matters. Not difficult for experienced highway drivers, but worth previewing the tricky sections before you go.
Where does it get tricky?
The main spots that need attention: at 2.4 miles: Navigation decision point; at 18.2 miles: Highway fork - watch signs carefully; at 40.4 miles (SC 462 / Morgandollar Road): Navigation decision point.
Critical Maneuvers
5 of 25 key pointsThese are the spots where you need to pay the most attention. Preview them before you drive.
4
2.4 mi into trip
|
~6m in
Take the ramp
Navigation decision point
5
18.2 mi into trip
|
~27m in
Keep slight right at fork
Highway fork - watch signs carefully
4
40.4 mi into trip
|
~57m in
|
SC 462 / Morgandollar Road
Turn left onto SC 462 / Morgandollar Road
Navigation decision point
5
61.6 mi into trip
|
~1h 30m in
|
SC 68 / Yemassee Highway
Turn left onto SC 68 / Yemassee Highway
Navigation decision point
6
81.3 mi into trip
|
~2h in
|
US 278 / Pine Street
Turn left onto US 278 / Pine Street
Lane positioning matters here
Use the left lane.
Main Roads
| Road | Distance | Duration |
|---|---|---|
| Grays Highway | 17.2 mi | 25m |
| US 278 | 12.1 mi | 17m |
| Old Barnwell Road | 11.8 mi | 16m |
| Coosaw Scenic Drive | 9.7 mi | 13m |
| Fording Island Road | 9 mi | 13m |
| Edgefield Highway | 8.2 mi | 12m |
| Kings Avenue | 8.2 mi | 12m |
| Lowcountry Drive | 7.9 mi | 10m |
Longest stretch:
Grays Highway
— 17.2 mi, about 25m
Turn-by-Turn Driving Directions
Step-by-step road directions between Hilton Head Island, SC and Johnston, SC.
1
Start on Allen Road
0.2 mi
·
41 sec
·
Allen Road
2
Turn left onto Marshland Road
2.2 mi
·
5 min
·
Marshland Road
3
Take the ramp
0.4 mi
·
53 sec
4
Merge onto US 278
2.3 mi
·
2 min
·
Cross Island Parkway
5
Merge onto US 278
3.9 mi
·
4 min
·
William Hilton Parkway
6
Continue on US 278
9.0 mi
·
13 min
·
Fording Island Road
7
Take the exit
0.3 mi
·
39 sec
8
Keep slight right at fork
147 ft
·
4 sec
9
Merge onto SC 170
3.9 mi
·
4 min
·
Okatie Highway
10
Take the exit
488 ft
·
13 sec
11
Continue on SC 462
7.9 mi
·
10 min
·
Lowcountry Drive
12
Continue on SC 462
9.7 mi
·
13 min
·
Coosaw Scenic Drive
13
Turn right onto SC 462
0.6 mi
·
1 min
·
West Frontage Road
14
Turn left onto SC 462
4.0 mi
·
6 min
·
Morgandollar Road
15
At end of road, turn right onto US 278; SC 462
17 mi
·
25 min
·
Grays Highway
16
Turn right
177 ft
·
11 sec
17
Turn left onto SC 68
469 ft
·
7 sec
·
Yemassee Highway
18
Continue on US 278
1.1 mi
·
1 min
·
Augusta Highway
19
Continue on US 278
2.1 mi
·
3 min
·
East Carolina Avenue
20
Continue on US 278
2.7 mi
·
4 min
·
Elm Street East
21
Continue on US 278
3.7 mi
·
5 min
·
Augusta Highway
22
Continue on US 278
1.4 mi
·
2 min
·
Railroad Avenue Southeast
23
Continue on US 278
1.8 mi
·
2 min
·
Augusta Highway
24
Continue on US 278
1.1 mi
·
1 min
·
Allendale-Hampton Highway
25
Continue on US 278
4.5 mi
·
6 min
·
Allendale-Fairfax Highway
26
Continue on US 278
1.0 mi
·
1 min
·
East Railroad Avenue
27
Turn right onto US 278; US 301
0.3 mi
·
29 sec
·
Main Street North
28
Turn left onto US 278
0.2 mi
·
16 sec
·
Pine Street
Use the left lane.
29
Continue on US 278
6.9 mi
·
10 min
·
Barnwell Road
30
Continue on US 278
8.2 mi
·
12 min
·
Kings Avenue
31
Turn left onto US 278
1.6 mi
·
2 min
·
Jackson Street
32
Turn slight left onto US 278; SC 64
0.2 mi
·
19 sec
·
Dunbarton Boulevard
33
Turn slight right onto US 278
2.3 mi
·
4 min
·
Ellenton Street
34
Turn left onto US 278
12 mi
·
17 min
·
US 278
35
Turn right onto SC 781
2.8 mi
·
3 min
·
Tinker Creek Road
36
Turn left onto S-55
0.3 mi
·
1 min
·
Kitchings Road
37
Turn left onto Old Barnwell Road
12 mi
·
16 min
·
Old Barnwell Road
38
At end of road, turn left onto US 78
2.8 mi
·
3 min
·
Charleston Highway
39
Turn right onto SC 118; US 78 Truck; SC 302
0.1 mi
·
12 sec
·
Pine Log Road
40
Continue on SC 118; US 78 Truck
2.8 mi
·
4 min
·
Rudy Mason Parkway
41
Continue on SC 118; US 1 Truck; US 78 Truck
1.0 mi
·
1 min
·
Rutland Drive
42
Turn right onto SC 19
0.2 mi
·
18 sec
·
Laurens Street Northwest
43
Continue on SC 19
8.2 mi
·
12 min
·
Edgefield Highway
44
Turn right onto SC 191
3.8 mi
·
6 min
·
Johnston Highway
45
Continue on SC 191
6.3 mi
·
11 min
·
Charles E Simmons Highway
46
Turn right onto SC 121
1.3 mi
·
2 min
·
Lee Street
47
Arrive at destination
SC 121
Trip Plan
Given the relatively short drive time of under four hours, you have considerable flexibility in when you depart. Consider leaving mid-morning to avoid the earliest rush and allow for a relaxed pace. Since this is a single-day trip with a manageable 154.2 miles, you likely won't need extensive rest stops, but plan for at least one break. Keep an eye on your fuel gauge, as the $24 estimated cost suggests you'll be navigating areas with potentially fewer large service stations. A specific tip for this route: pay close attention to signage as you approach Old Barnwell Road, as it's a key transition point on this local-focused journey.
Morning Departure
An early start around 7-8 AM gets you there with plenty of daylight left.
Evening Departure
A late afternoon start means arriving after dark. Morning is better.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 77.1 miles from Hilton Head Island, SC, or about 1h 53m into the drive.
The longest continuous stretch on this route runs about 17.2 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 34 miles or 48m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 77.1 miles or 1h 53m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 3h 7m
Traffic, exits, and arrival timing usually matter more near Johnston, SC than in the middle of the route.
Before You Leave
+
Open the route before leaving Hilton Head Island, SC 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 Hilton Head Island, SC
This is one driving day of about 154.2 miles and 3h 51m.
Your first comfortable stop window is around 34 miles from Hilton Head Island, SC.
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 Grays Highway for about 17.2 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 77.1 mi from Hilton Head Island, SC · 1h 53m into the drive
Mid-route town
Meal stop
77 mi into the route
Best for: Lunch, fuel, and a longer reset
This sits close to the middle of the route, so it works well for the longest stop of the day.
Pacing Suggestions
Fuel and coffee
A short stop after about 34 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 77.1 miles from Hilton Head Island, SC, which is a good place for a longer meal and fuel stop.
Arriving in Johnston, SC
The final approach into Johnston, SC usually feels slower than the middle of the drive, so avoid planning your tightest schedule at the very end.
Try to arrive with enough fuel left to skip an immediate station stop unless you already know the area around Johnston, SC.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
Fuel & Cost
Regular Gas
$24.11 one way
$48.23 round trip
$3.97/gal
25.4 MPG avg
54 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.34 | $26.37 | $52.73 |
| premium | $4.70 | $28.54 | $57.08 |
| diesel | $5.61 | $34.05 | $68.09 |
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$24
Meals
$25–$50
Total
$49–$74
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 54 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $16 in charging · 0 stops · 67% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 46.3 | 0 | $16.19 | $7.40 |
| Efficient EV | 38.6 | 0 | $13.49 | $6.17 |
| EV Truck/SUV | 61.7 | 0 | $21.59 | $9.87 |
Gas CO2
54 kg
EV CO2
18 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.
Destination
Johnston, SC
Morning in Johnston on Saturday
Local time
8:11 AM
EDT
Current temp
49°F
Unavailable
Live forecast
49°F
Boiling Springs, SC
77 mi in
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
32 degrees cooler at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
3h 51m on the road
Use the two city cards together: check the sky where you start, then compare it with the local time and temperature at arrival.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
Frequently Asked Questions
The drive from Hilton Head Island, SC to Johnston, SC covers 154.2 miles and takes about 3h 51m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are Grays Highway, US 278, Old Barnwell Road. Expect a mix of highway and local road driving.
This is a comfortable same-day trip.
The midpoint is about 77.1 miles from Hilton Head Island, SC. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $24.11 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
An early start around 7-8 AM gets you there with plenty of daylight left. A late afternoon start means arriving after dark. Morning is better.
Plan about 1 meaningful break for fuel, food, or rest. A short stop every 2 to 3 hours is enough for this drive.
This drive requires moderate attention. Across 154.2 miles you will encounter 25 spots where lane choice or exit timing matters. Not difficult for experienced highway drivers, but worth previewing the tricky sections before you go.
The main spots that need attention: at 2.4 miles: Navigation decision point; at 18.2 miles: Highway fork - watch signs carefully; at 40.4 miles (SC 462 / Morgandollar Road): Navigation decision point.
The route from Hilton Head Island, SC to Johnston, SC does not surface many named destination signs beyond the main corridor.
How this page is built
Compiled by the Trip.ovh planning team at COD Solutions Oy from open government datasets — OSRM over OpenStreetMap for geometry, and EIA for fuel prices. See our methodology for refresh cadence and limitations.
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