How far is Greentree, NJ from Union, NJ?
The driving distance from Greentree, NJ to Union, NJ is about 74.9 miles (120.5 km), with a travel time of about 01h 17m by car.
- The straight-line flight distance is about 66.2 miles (106.6 km).
- For a round trip, plan for roughly 02h 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 01h 17m.
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.
Borough in Mercer County, New Jersey
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Clear then Patchy Fog
Chance Rain Showers
Driving Route Map
The map below follows the saved road route between Greentree and Union.
Turn-by-Turn Driving Directions
Step-by-step road directions between Greentree and Union.
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1
Start on the route
719 ft · 55 sec
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2
At the end of the road, turn right onto Marlton Pike
1.5 km · 1 min · Marlton Pike
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3
Turn left onto North Cropwell Road
3211 ft · 2 min · North Cropwell Road
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4
At the end of the road, turn left onto Holtec Drive
1844 ft · 51 sec · Holtec Drive
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5
Turn right onto Greentree Road
570 ft · 12 sec · Greentree Road
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6
Turn left
1.6 mi · 2 min
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7
Continue straight
60 m · 3 sec
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8
Take the exit slight right toward NJTP
1422 ft · 38 sec
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9
Keep slight left to continue on NJTP North: New York
2795 ft · 1 min
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10
Merge slight left onto New Jersey Turnpike
14.6 mi · 17 min · New Jersey Turnpike
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11
Keep slight left to continue on New Jersey Turnpike
41.4 mi · 48 min · New Jersey Turnpike
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12
Take the exit slight right toward GSP, US 9: Garden State Parkway, Woodbridge
2531 ft · 1 min
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13
Keep slight right to continue on GSP North: Garden State Parkway
1.2 km · 2 min
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14
Merge slight left onto Garden State Parkway
11.2 mi · 16 min · Garden State Parkway
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15
Take the exit slight right toward US 22, NJ 82: Hillside
1526 ft · 39 sec
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16
Merge slight left
48 m · 3 sec
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17
Take the exit slight right toward NJ 82: Morris Avenue, Kean University, Elizabeth
878 ft · 24 sec
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18
Turn slight right onto Morris Avenue
690 ft · 15 sec · Morris Avenue
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19
Turn slight right
155 m · 44 sec
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20
Turn left onto Morris Avenue
2494 ft · 55 sec · Morris Avenue
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21
Turn right onto Harding Avenue
646 ft · 29 sec · Harding Avenue
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22
Turn right onto Vauxhall Road
10 m · 5 sec · Vauxhall Road
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23
Turn left onto Harding Avenue
74 m · 11 sec · Harding Avenue
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24
Arrive at your destination
0 m · 1 sec · Harding Avenue
Car Route Details
A richer read on the saved driving route between Greentree 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.
New Jersey Turnpike
Keep slight left to continue on New Jersey Turnpike
41.4 mi · 00h 48m
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 Clear then Patchy Fog leaving Greentree and Chance Rain Showers near Union.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Greentree to Union?
The road trip is about 74.9 miles (120.5 km) and usually takes 01h 17m 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?
Hightstown is a useful midpoint, sitting about 37.2 miles from Greentree and 37.7 miles from Union.
How much longer is the road route than the straight-line distance?
The direct path is about 66.2 miles (106.6 km), while the road route adds roughly 8.7 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 3:56 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $10.79 one way or $21.57 round trip. Estimated CO2 is about 23.5 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Clear then Patchy Fog around Greentree and Chance Rain Showers near Union.
Stop Ideas Near Hightstown
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Old City Hall
Trenton City Hall
Trenton Health & Human Services
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Hightstown.
Princeton Junction station
Trenton Transit Center
New Brunswick station
Metropark station
Flight Path Map
This map shows the direct air route between Greentree and Union. Straight-line distance: 66.26 mi (106.64 km).
#1 Greentree
Census designated place
| Population | 11,367 |
| Coordinates | 39.8970600, -74.9557200 |
| Altitude | 31 |
| Country | United States |
#2 Union
A city in Union County, New Jersey.
| Population | 67,137 |
| Coordinates | 40.6976000, -74.2632000 |
| Altitude | 30 |
| Country | United States |
End: Harding Avenue (-74.26348, 40.697581)
Estimated Travel Time
Distance: 120 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 02h 29m |
| 40 mph (64.37 km/h) | 01h 52m |
| 50 mph (80.47 km/h) | 01h 29m |
| 60 mph (96.56 km/h) | 01h 14m |
| 70 mph (112.65 km/h) | 01h 04m |
| 80 mph (129 km/h) | 00h 56m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.09 | $10.79 | $21.57 |
| Mid-grade | $4.60 | $12.14 | $24.28 |
| Premium | $4.95 | $13.08 | $26.16 |
| Diesel | $5.98 | $15.79 | $31.57 |
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 · 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.