How far is Stony Brook, NY from Islip, NY?
The driving distance from Stony Brook, NY to Islip, NY is about 15.8 miles (25.4 km), with a travel time of about 00h 27m by car.
- The straight-line flight distance is about 14 miles (22.5 km).
- For a round trip, plan for roughly 00h 54m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 7:00 AM to 7:00 PM EDT.
Reverse, save, or send this route
This is an easy same-day return drive. Copy the route link, send it to another device, or print a clean version before you head out.
This is an easy same-day return drive.
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 27m.
This is a short drive, so your comfort window is wide. Traffic and current weather matter more than the clock.
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 Suffolk County, New York
Route Weather Snapshot
Check the forecast at both ends before you head out.
Rain Showers Likely
Rain Showers Likely
Driving Route Map
The map below follows the saved road route between Stony Brook and Islip.
Turn-by-Turn Driving Directions
Step-by-step road directions between Stony Brook and Islip.
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1
Start on Cedar Street
20 m · 2 sec · Cedar Street
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2
Turn left onto Christian Avenue
2555 ft · 51 sec · Christian Avenue
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3
Continue on Main Street
1.1 km · 1 min · Main Street
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4
Continue on North Country Road
1.1 km · 1 min · North Country Road
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5
Continue on Smithtown-Port Jefferson Road
1.5 km · 2 min · Smithtown-Port Jefferson Road
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6
Turn slight left onto North Country Road
3.4 mi · 6 min · North Country Road
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7
Continue on Hauppauge Road
1.3 mi · 2 min · Hauppauge Road
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8
Continue on Hauppauge Boulevard
1.5 km · 1 min · Hauppauge Boulevard
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9
At the end of the road, turn right onto Townline Road
128 m · 9 sec · Townline Road
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10
Keep slight left to continue on Wheeler Road
1.6 mi · 3 min · Wheeler Road
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11
Keep slight right to continue on Joshuas Path
1.5 mi · 2 min · Joshuas Path
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12
Continue on Islip Avenue
4 mi · 7 min · Islip Avenue
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13
At the end of the road, turn right onto Main Street
865 ft · 15 sec · Main Street
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14
Arrive at your destination
0 m · 1 sec · Main Street
Car Route Details
A richer read on the saved driving route between Stony Brook and Islip.
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.
Islip Avenue
Continue on Islip Avenue
4.03 mi · 00h 07m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A short regional drive
This route is short enough to handle as a quick errand, commute, or easy same-day return without much planning overhead.
Rain Showers Likely leaving Stony Brook and Rain Showers Likely near Islip.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Stony Brook to Islip?
The road trip is about 15.8 miles (25.4 km) and usually takes 00h 27m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is short enough to handle as a quick errand, commute, or easy same-day return without much planning overhead.
What is the halfway point on this route?
Hauppauge is a useful midpoint, sitting about 7.9 miles from Stony Brook and 7.9 miles from Islip.
How much longer is the road route than the straight-line distance?
The direct path is about 14 miles (22.5 km), while the road route adds roughly 1.8 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 7:00 AM to 7:00 PM EDT. If you want a more comfortable same-day return, try to leave by 7:36 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $2.25 one way or $4.49 round trip. Estimated CO2 is about 5 kg one way.
What should you check before leaving?
Before you leave, expect Rain Showers Likely around Stony Brook and Rain Showers Likely near Islip.
Stop Ideas Near Hauppauge
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Town of Babylon History Museum at Old Town Hall
Brookhaven Town Hall
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Hauppauge.
Stamford Transportation Center
Bridgeport
New Rochelle station
Union Station
Flight Path Map
This map shows the direct air route between Stony Brook and Islip. Straight-line distance: 14.01 mi (22.55 km).
#1 Stony Brook
Public university in Stony Brook, New York, United States
| Population | 13,740 |
| Coordinates | 40.9256500, -73.1409400 |
| Altitude | 27 |
| 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: 25 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 00h 31m |
| 40 mph (64.37 km/h) | 00h 23m |
| 50 mph (80.47 km/h) | 00h 18m |
| 60 mph (96.56 km/h) | 00h 15m |
| 70 mph (112.65 km/h) | 00h 13m |
| 80 mph (129 km/h) | 00h 11m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.01 | $2.25 | $4.49 |
| Mid-grade | $4.48 | $2.51 | $5.02 |
| Premium | $4.86 | $2.72 | $5.44 |
| Diesel | $4.69 | $2.63 | $5.26 |
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.