How far is Denville, NJ from Iselin, NJ?
The driving distance from Denville, NJ to Iselin, NJ is about 34.2 miles (55.1 km), with a travel time of about 00h 47m by car.
- The straight-line flight distance is about 23.4 miles (37.6 km).
- For a round trip, plan for roughly 01h 34m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM EDT.
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 00h 47m.
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.
City in Union County, New Jersey, United States
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 Denville and Iselin.
Turn-by-Turn Driving Directions
Step-by-step road directions between Denville and Iselin.
-
1
Start on Broadway Avenue
27 m · 4 sec · Broadway Avenue
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2
Turn right onto Center Street
79 m · 13 sec · Center Street
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3
Turn right onto Bloomfield Avenue
72 m · 9 sec · Bloomfield Avenue
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4
Turn left onto East Main Street
656 ft · 24 sec · East Main Street
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5
Turn left onto I 80 East
1205 ft · 30 sec
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6
Merge slight left onto Christopher Columbus Highway
3.6 mi · 4 min · Christopher Columbus Highway
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7
Take the exit slight right toward I 287: Morristown, Mahwah
732 ft · 18 sec
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8
Keep slight right to continue on I 287 South: Morristown, Somerville
1168 ft · 29 sec
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9
Merge slight left
3.4 mi · 5 min
-
10
Take the exit slight right toward NJ 24 East: Springfield
1.1 km · 1 min
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11
Continue straight
9.3 mi · 11 min
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12
Keep slight left to continue on I 78 East: Holland Tunnel, New York City, Newark
1877 ft · 29 sec
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13
Keep slight right to continue on I 78 East Local: Newark
1220 ft · 17 sec
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14
Merge slight right onto Phillipsburg-Newark Expressway
3.4 mi · 4 min · Phillipsburg-Newark Expressway
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15
Take the exit slight right toward GSP: G.S. Parkway
1412 ft · 48 sec
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16
Keep slight right to continue on GSP South
3153 ft · 2 min
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17
Merge slight left onto Garden State Parkway
10.7 mi · 15 min · Garden State Parkway
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18
Take the exit right toward NJ 27: Iselin, Metuchen
1278 ft · 52 sec
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19
At the end of the road, turn left onto Lincoln Highway
2492 ft · 51 sec · Lincoln Highway
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20
Turn slight left onto Auth Avenue
707 ft · 29 sec · Auth Avenue
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21
Turn left onto Wright Street
135 m · 19 sec · Wright Street
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22
Arrive at your destination
0 m · 1 sec · Wright Street
Car Route Details
A richer read on the saved driving route between Denville and Iselin.
Turn-heavy local drive
The route has frequent decision points for its length, so lane choice and turn timing will matter more than cruising speed.
Garden State Parkway
Merge slight left onto Garden State Parkway
10.7 mi · 00h 15m
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 Denville and Mostly Sunny near Iselin.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Denville to Iselin?
The road trip is about 34.2 miles (55.1 km) and usually takes 00h 47m 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?
Summit is a useful midpoint, sitting about 17.1 miles from Denville and 17.1 miles from Iselin.
How much longer is the road route than the straight-line distance?
The direct path is about 23.4 miles (37.6 km), while the road route adds roughly 10.8 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 EDT. If you want a more comfortable same-day return, try to leave by 4:56 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $4.94 one way or $9.89 round trip. Estimated CO2 is about 10.8 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Denville and Mostly Sunny near Iselin.
Stop Ideas Near Summit
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 Summit.
Newark Liberty International Airport
Pennsylvania Station
Metropark station
New Brunswick station
Flight Path Map
This map shows the direct air route between Denville and Iselin. Straight-line distance: 23.35 mi (37.58 km).
#1 Denville
Township in Morris County, New Jersey
| Population | 16,362 |
| Coordinates | 40.8923200, -74.4773800 |
| Altitude | 154 |
| Country | United States |
#2 Iselin
Unincorporated community in New Jersey, United States
| Population | 18,695 |
| Coordinates | 40.5753800, -74.3223700 |
| Altitude | 19 |
| Country | United States |
End: Iselin (-74.32237, 40.57538)
Estimated Travel Time
Distance: 55 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 08m |
| 40 mph (64.37 km/h) | 00h 51m |
| 50 mph (80.47 km/h) | 00h 41m |
| 60 mph (96.56 km/h) | 00h 34m |
| 70 mph (112.65 km/h) | 00h 29m |
| 80 mph (129 km/h) | 00h 25m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.09 | $4.94 | $9.89 |
| Mid-grade | $4.60 | $5.56 | $11.13 |
| Premium | $4.95 | $5.99 | $11.99 |
| Diesel | $5.98 | $7.24 | $14.47 |
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 New Jersey · Aug 11, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.