How far is De Peyster, NY from Islip, NY?
The driving distance from De Peyster, NY to Islip, NY is about 410.4 miles (660.4 km), with a travel time of about 07h 20m by car.
- The straight-line flight distance is about 287.3 miles (462.3 km).
- For a round trip, plan for roughly 14h 40m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 7:30 AM EDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
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 07h 20m.
Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
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.
Located in the county of New York
Route Weather Snapshot
Check the forecast at both ends before you head out.
Partly Sunny then Slight Chance Rain Showers
Partly Sunny
Driving Route Map
The map below follows the saved road route between De Peyster and Islip.
Turn-by-Turn Driving Directions
Step-by-step road directions between De Peyster and Islip.
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1
Start on Plimpton Road
8 m · 2 sec · Plimpton Road
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2
Turn right onto County Highway 10
1.1 mi · 3 min · County Highway 10
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3
Turn left onto County Highway 45
1.9 mi · 5 min · County Highway 45
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4
At the end of the road, turn left onto County Highway 17
1.6 km · 2 min · County Highway 17
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5
Continue on Dekalb-de Peyster Road
1963 ft · 54 sec · Dekalb-de Peyster Road
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6
Continue on County Road 17
3.3 mi · 8 min · County Road 17
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7
At the end of the road, turn right onto State Highway 812
2.6 mi · 3 min · State Highway 812
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8
At the end of the road, turn right
11.5 mi · 13 min
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9
Turn left onto William Street
2943 ft · 40 sec · William Street
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10
Continue on State Highway 58
5.5 mi · 6 min · State Highway 58
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11
Turn right onto Balmat-Fowler Road
2.1 mi · 2 min · Balmat-Fowler Road
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12
Continue on State Highway 812
7.9 mi · 9 min · State Highway 812
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13
At the end of the road, turn right onto State Highway 812
1770 ft · 34 sec · State Highway 812
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14
Continue on State Street
2079 ft · 59 sec · State Street
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15
Continue on Main Street
1.2 km · 2 min · Main Street
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16
Continue on State Route 3
2.9 mi · 4 min · State Route 3
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17
Turn left onto Indian River Road
5.7 mi · 7 min · Indian River Road
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18
Continue on Indian River Road
10.4 mi · 13 min · Indian River Road
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19
Continue on Main Street
1.3 km · 2 min · Main Street
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20
Continue on State Highway 812
8.4 mi · 11 min · State Highway 812
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21
Turn left onto East State Street
1.5 mi · 4 min · East State Street
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22
Continue on Ross Road
2675 ft · 1 min · Ross Road
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23
Turn left onto Bea Luck Road
19.6 mi · 23 min · Bea Luck Road
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24
Continue on State Highway 12
1.2 km · 52 sec · State Highway 12
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25
Continue on Erwin Parkway
9.7 mi · 11 min · Erwin Parkway
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26
Continue on State Highway 12
22 mi · 31 min · State Highway 12
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27
Take the exit slight right
1572 ft · 38 sec
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28
Merge slight left onto State Route 49
2039 ft · 27 sec · State Route 49
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29
Continue straight
998 ft · 13 sec
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30
Take the exit slight right toward Genesee Street South
840 ft · 18 sec
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31
Keep slight left to continue on I 90
1.2 km · 2 min
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32
Keep slight right to continue on I 90 East
1766 ft · 43 sec
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33
Merge slight left onto New York State Thruway
83.7 mi · 1 hr 37 min · New York State Thruway
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34
Keep slight right to continue on New York State Thruway
118.2 mi · 2 hr 16 min · New York State Thruway
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35
Keep slight right to continue on I 287 South, NJ 17 South: New Jersey
1.5 km · 60 sec
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36
Continue straight
2496 ft · 39 sec
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37
Keep slight left to continue on NJ 17 South: Mahwah
14.1 mi · 19 min
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38
Take the exit slight right toward NJ 4, GSP South: Paterson, Fort Lee, New York
566 ft · 19 sec
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39
Keep slight left to continue on NJ 4 East: Fort Lee, New York
2455 ft · 1 min
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40
Merge slight left
1417 ft · 24 sec
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41
Continue straight
6.4 mi · 9 min
-
42
Take the exit slight left toward I 95 North: George Washington Bridge
1124 ft · 18 sec
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43
Merge slight left
1.2 km · 55 sec
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44
Keep slight left
1.3 km · 1 min
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45
Continue on George Washington Bridge (upper level)
3174 ft · 1 min · George Washington Bridge (upper level)
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46
Continue on Trans-Manhattan Expressway
1.2 km · 1 min · Trans-Manhattan Expressway
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47
Continue on Cross Bronx Expressway
4.7 mi · 6 min · Cross Bronx Expressway
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48
Keep slight right to continue on Cross Bronx Expressway
2 mi · 3 min · Cross Bronx Expressway
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49
Merge slight left onto Throgs Neck Expressway
3271 ft · 58 sec · Throgs Neck Expressway
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50
Continue on Throgs Neck Bridge
2 mi · 3 min · Throgs Neck Bridge
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51
Continue on Clearview Expressway
5 mi · 5 min · Clearview Expressway
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52
Continue on Hollis Court Boulevard
1.2 km · 1 min · Hollis Court Boulevard
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53
At the end of the road, turn left onto Jamaica Avenue
1117 ft · 35 sec · Jamaica Avenue
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54
Turn right onto Hempstead Avenue
1.4 km · 2 min · Hempstead Avenue
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55
Turn right onto 225th Street
69 m · 10 sec · 225th Street
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56
Take the ramp straight toward Cross Island Parkway South, Verrazano Bridge
1171 ft · 29 sec
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57
Merge slight left onto Cross Island Parkway
1.3 mi · 2 min · Cross Island Parkway
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58
Take the exit slight left toward Southern State Parkway East, Eastern Long Island
2383 ft · 1 min
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59
Merge slight left onto Southern State Parkway
24.5 mi · 31 min · Southern State Parkway
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60
Keep slight left to continue on Southern State Parkway
1072 ft · 16 sec · Southern State Parkway
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61
Take the exit slight right toward Bay Shore Road South, Bay Shore
1044 ft · 32 sec
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62
Turn straight onto Bay Shore Road
2667 ft · 1 min · Bay Shore Road
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63
Continue on Howells Road
1845 ft · 44 sec · Howells Road
-
64
Turn straight onto Sunrise Highway
104 m · 7 sec · Sunrise Highway
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65
Keep slight right to continue on Howells Road
3115 ft · 2 min · Howells Road
-
66
Continue on Roosevelt Street
1248 ft · 25 sec · Roosevelt Street
-
67
Continue on 3rd Avenue
1 km · 1 min · 3rd Avenue
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68
At the end of the road, turn left onto East Main Street
1.1 mi · 2 min · East Main Street
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69
Continue on Montauk Highway
1014 ft · 17 sec · Montauk Highway
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70
Continue on Main Street
1.2 km · 1 min · Main Street
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71
Arrive at your destination
0 m · 1 sec · Main Street
Car Route Details
A richer read on the saved driving route between De Peyster and Islip.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
New York State Thruway
Keep slight right to continue on New York State Thruway
118 mi · 02h 16m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
Better with a longer stop
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
Partly Sunny then Slight Chance Rain Showers leaving De Peyster 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 De Peyster to Islip?
The road trip is about 410.4 miles (660.4 km) and usually takes 07h 20m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
What is the halfway point on this route?
Rotterdam is a useful midpoint, sitting about 199.3 miles from De Peyster and 211 miles from Islip.
How much longer is the road route than the straight-line distance?
The direct path is about 287.3 miles (462.3 km), while the road route adds roughly 123.1 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 6:00 AM to 7:30 AM EDT. Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $58.05 one way or $116.10 round trip. Estimated CO2 is about 128.7 kg one way.
What should you check before leaving?
Before you leave, expect Partly Sunny then Slight Chance Rain Showers around De Peyster and Partly Sunny near Islip.
Stop Ideas Near Rotterdam
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
City Hall Lot
Albany City Hall
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Rotterdam.
Schenectady
Albany–Rensselaer
Amsterdam station
Saratoga Springs station
Flight Path Map
This map shows the direct air route between De Peyster and Islip. Straight-line distance: 287.29 mi (462.35 km).
#1 De Peyster
Human settlement in St.
| Population | 1,048 |
| Coordinates | 44.5525600, -75.4355000 |
| Altitude | 114 |
| 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: Main Street (-73.210382, 40.729789)
Estimated Travel Time
Distance: 660 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 13h 40m |
| 40 mph (64.37 km/h) | 10h 15m |
| 50 mph (80.47 km/h) | 08h 12m |
| 60 mph (96.56 km/h) | 06h 50m |
| 70 mph (112.65 km/h) | 05h 51m |
| 80 mph (129 km/h) | 05h 07m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.01 | $58.05 | $116.10 |
| Mid-grade | $4.48 | $64.88 | $129.77 |
| Premium | $4.86 | $70.39 | $140.77 |
| Diesel | $4.69 | $67.97 | $135.94 |
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 18, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.