How far is Union, NJ from Montgomery, NJ?
The driving distance from Union, NJ to Montgomery, NJ is about 40.8 miles (65.7 km), with a travel time of about 01h 00m by car.
- The straight-line flight distance is about 29.9 miles (48.1 km).
- For a round trip, plan for roughly 02h 00m 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 00m.
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 Somerset County, New Jersey
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Sunny
Driving Route Map
The map below follows the saved road route between Union and Montgomery.
Turn-by-Turn Driving Directions
Step-by-step road directions between Union and Montgomery.
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1
Start on Harding Avenue
74 m · 12 sec · Harding Avenue
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2
Turn right onto Vauxhall Road
2 mi · 5 min · Vauxhall Road
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3
Turn left onto Springfield Avenue
3245 ft · 1 min · Springfield Avenue
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4
Continue on Springfield Avenue
149 m · 10 sec · Springfield Avenue
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5
Take the ramp slight right toward I 78 West: Clinton
1630 ft · 41 sec
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6
Merge slight left onto Phillipsburg-Newark Expressway
18.9 mi · 22 min · Phillipsburg-Newark Expressway
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7
Take the exit slight right toward I 287: Morristown, Somerville
2521 ft · 43 sec
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8
Keep slight left to continue on I 287 South, US 202 South, US 206 South: Somerville
1 mi · 1 min
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9
Merge slight right
2.3 mi · 3 min
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10
Take the exit slight left toward US 202 South, US 206 South: Somerville, Flemington
1 km · 43 sec
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11
Merge slight left
1 mi · 2 min
-
12
Take the exit straight toward US 206 South, NJ 28: Somerville, Princeton
1277 ft · 37 sec
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13
Enter the roundabout and take exit 2 toward Somerville Circle
525 ft · 7 sec
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14
Exit the rotary
5 mi · 8 min
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15
Take the exit slight right toward US 206 South
754 ft · 21 sec
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16
Turn right
1.2 km · 1 min
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17
Turn right onto Amwell Road
5.7 mi · 10 min · Amwell Road
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18
Turn left onto Long Hill Road
1.2 km · 2 min · Long Hill Road
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19
Turn right onto Wertsville Road
1.3 km · 2 min · Wertsville Road
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20
Turn right onto Montgomery Road
16 m · 2 sec · Montgomery Road
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21
Arrive at your destination
0 m · 1 sec · Montgomery Road
Car Route Details
A richer read on the saved driving route between Union and Montgomery.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Phillipsburg-Newark Expressway
Merge slight left onto Phillipsburg-Newark Expressway
18.9 mi · 00h 22m
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 Union and Sunny near Montgomery.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Union to Montgomery?
The road trip is about 40.8 miles (65.7 km) and usually takes 01h 00m 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?
Far Hills is a useful midpoint, sitting about 20.4 miles from Union and 20.4 miles from Montgomery.
How much longer is the road route than the straight-line distance?
The direct path is about 29.9 miles (48.1 km), while the road route adds roughly 10.9 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 8:00 AM to 10:00 AM EDT. If you want a more comfortable same-day return, try to leave by 4:30 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $5.88 one way or $11.77 round trip. Estimated CO2 is about 12.8 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Union and Sunny near Montgomery.
Stop Ideas Near Far Hills
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 Far Hills.
New Brunswick station
Metropark station
Newark Liberty International Airport
Pennsylvania Station
Flight Path Map
This map shows the direct air route between Union and Montgomery. Straight-line distance: 29.86 mi (48.06 km).
#1 Union
A city in Union County, New Jersey.
| Population | 67,137 |
| Coordinates | 40.6976000, -74.2632000 |
| Altitude | 30 |
| Country | United States |
#2 Montgomery
Township in Somerset County, New Jersey
| Population | 23,094 |
| Coordinates | 40.4784400, -74.7537700 |
| Altitude | 38 |
| Country | United States |
End: Montgomery (-74.75377, 40.47844)
Estimated Travel Time
Distance: 66 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 21m |
| 40 mph (64.37 km/h) | 01h 01m |
| 50 mph (80.47 km/h) | 00h 48m |
| 60 mph (96.56 km/h) | 00h 40m |
| 70 mph (112.65 km/h) | 00h 34m |
| 80 mph (129 km/h) | 00h 30m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.09 | $5.88 | $11.77 |
| Mid-grade | $4.60 | $6.62 | $13.25 |
| Premium | $4.95 | $7.13 | $14.27 |
| Diesel | $5.98 | $8.61 | $17.22 |
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.