How far is Northwest Harbor, NY from Islip, NY?
The driving distance from Northwest Harbor, NY to Islip, NY is about 60.9 miles (98 km), with a travel time of about 01h 38m by car.
- The straight-line flight distance is about 55.2 miles (88.8 km).
- For a round trip, plan for roughly 03h 17m 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 38m.
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.
Census-designated place in New York
Route Weather Snapshot
Check the forecast at both ends before you head out.
Partly Sunny
Partly Sunny
Driving Route Map
The map below follows the saved road route between Northwest Harbor and Islip.
Turn-by-Turn Driving Directions
Step-by-step road directions between Northwest Harbor and Islip.
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1
Start on the route
2184 ft · 3 min
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2
Turn left onto Northwest Road
1.1 km · 2 min · Northwest Road
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3
At the end of the road, turn left onto Old Northwest Road
1.7 mi · 4 min · Old Northwest Road
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4
Continue on Old Northwest Road
883 ft · 25 sec · Old Northwest Road
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5
Continue on Stephen Hands Path
1617 ft · 47 sec · Stephen Hands Path
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6
Turn right
17 m · 7 sec
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7
Turn left
11 m · 2 sec
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8
Turn right onto Stephen Hands Path
1.7 mi · 4 min · Stephen Hands Path
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9
Merge slight left onto Montauk Highway
8.6 mi · 17 min · Montauk Highway
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10
Take the exit slight right toward NY 27 West: New York
113 m · 7 sec
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11
Merge slight left onto County Road 39A
5.5 mi · 11 min · County Road 39A
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12
Continue on Sunrise Highway
39.9 mi · 53 min · Sunrise Highway
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13
Take the exit slight right toward NY 111: Islip, Smithtown
593 ft · 15 sec
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14
Turn straight onto Sunrise Highway
3070 ft · 58 sec · Sunrise Highway
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15
Turn slight right onto NY 111 South: Islip
713 ft · 35 sec
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16
Turn straight onto Islip Avenue
1.4 km · 2 min · Islip Avenue
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17
At the end of the road, turn right onto Main Street
865 ft · 15 sec · Main Street
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18
Arrive at your destination
0 m · 1 sec · Main Street
Car Route Details
A richer read on the saved driving route between Northwest Harbor and Islip.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Sunrise Highway
Continue on Sunrise Highway
39.9 mi · 00h 53m
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.
Partly Sunny leaving Northwest Harbor and Partly Sunny near Islip.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Northwest Harbor to Islip?
The road trip is about 60.9 miles (98 km) and usually takes 01h 38m 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?
Northampton is a useful midpoint, sitting about 30.4 miles from Northwest Harbor and 30.5 miles from Islip.
How much longer is the road route than the straight-line distance?
The direct path is about 55.2 miles (88.8 km), while the road route adds roughly 5.7 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 3:12 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $8.62 one way or $17.24 round trip. Estimated CO2 is about 19.1 kg one way.
What should you check before leaving?
Before you leave, expect Partly Sunny around Northwest Harbor and Partly Sunny near Islip.
Stop Ideas Near Northampton
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 Northampton.
Union Station
Bridgeport
Old Saybrook station
Wallingford station
Flight Path Map
This map shows the direct air route between Northwest Harbor and Islip. Straight-line distance: 55.18 mi (88.81 km).
#1 Northwest Harbor
Census-designated place in Suffolk County, New York
| Population | 3,317 |
| Coordinates | 41.0098200, -72.2211900 |
| Altitude | 24 |
| Country | United States |
#2 Islip
This Long Island community is situated on the south shore of Suffolk County, New York, at an elevation of 13 feet.
| Population | 322,328 |
| Coordinates | 40.7298200, -73.2103900 |
| Altitude | 4 |
| Country | United States |
End: Islip (-73.21039, 40.72982)
Estimated Travel Time
Distance: 98 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 02h 01m |
| 40 mph (64.37 km/h) | 01h 31m |
| 50 mph (80.47 km/h) | 01h 13m |
| 60 mph (96.56 km/h) | 01h 00m |
| 70 mph (112.65 km/h) | 00h 52m |
| 80 mph (129 km/h) | 00h 45m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.01 | $8.62 | $17.24 |
| Mid-grade | $4.48 | $9.63 | $19.27 |
| Premium | $4.86 | $10.45 | $20.90 |
| Diesel | $4.69 | $10.09 | $20.18 |
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 York · Apr 19, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.