How far is Islip, NY from Great Valley, NY?
The driving distance from Islip, NY to Great Valley, NY is about 410.5 miles (660.6 km), with a travel time of about 08h 23m by car.
- The straight-line flight distance is about 299 miles (481.2 km).
- For a round trip, plan for roughly 16h 46m 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 08h 23m.
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.
City in Steuben County, New York, United States of America
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Driving Route Map
The map below follows the saved road route between Islip and Great Valley.
Turn-by-Turn Driving Directions
Step-by-step road directions between Islip and Great Valley.
-
1
Start on Main Street
1.2 km · 1 min · Main Street
-
2
Continue on Montauk Highway
1014 ft · 19 sec · Montauk Highway
-
3
Continue on Main Street
1.1 mi · 2 min · Main Street
-
4
Turn right onto 3rd Avenue
2920 ft · 1 min · 3rd Avenue
-
5
Continue on Rossevelt Street
1821 ft · 37 sec · Rossevelt Street
-
6
Continue on Howells Road
1.1 km · 2 min · Howells Road
-
7
Turn straight onto Sunrise Highway
50 m · 3 sec · Sunrise Highway
-
8
Keep slight right to continue on Howells Road
1588 ft · 36 sec · Howells Road
-
9
Continue on Bay Shore Road
3165 ft · 1 min · Bay Shore Road
-
10
Take the ramp slight right toward SO West: New York
736 ft · 19 sec
-
11
Continue straight
111 m · 9 sec
-
12
Merge slight left onto Southern State Parkway
24.7 mi · 32 min · Southern State Parkway
-
13
Take the exit slight right toward Cross Island Parkway North, Whitestone Bridge
1780 ft · 43 sec
-
14
Merge slight left onto Cross Island Parkway
1.3 mi · 2 min · Cross Island Parkway
-
15
Take the exit slight right toward NY 24: UBS Arena-Belmont Park
97 m · 9 sec
-
16
Keep slight left to continue on NY 24 West: Hempstead Avenue
133 m · 12 sec
-
17
Keep slight right to continue on Cross Island Parkway North, Hempstead Avenue West
532 ft · 15 sec
-
18
Keep slight right to continue on Hempstead Avenue West
81 m · 8 sec
-
19
Continue on Grandstand, Hempstead Avenue West
549 ft · 14 sec
-
20
Keep slight left to continue on Hempstead Avenue
31 m · 5 sec
-
21
Turn right onto Hempstead Avenue
1.6 km · 2 min · Hempstead Avenue
-
22
Turn left onto Jamaica Avenue
553 ft · 17 sec · Jamaica Avenue
-
23
Turn right onto 212th Street
1.2 km · 1 min · 212th Street
-
24
Continue on Clearview Expressway
5 mi · 5 min · Clearview Expressway
-
25
Continue on Throgs Neck Bridge
2 mi · 3 min · Throgs Neck Bridge
-
26
Continue on Throgs Neck Expressway
1.1 km · 1 min · Throgs Neck Expressway
-
27
Keep slight left to continue on Cross Bronx Expressway
6.6 mi · 9 min · Cross Bronx Expressway
-
28
Keep slight left to continue on Trans-Manhattan Expressway
1.1 km · 1 min · Trans-Manhattan Expressway
-
29
Continue on George Washington Bridge (upper level)
3167 ft · 60 sec · George Washington Bridge (upper level)
-
30
Continue straight
2659 ft · 48 sec
-
31
Keep slight left
3214 ft · 39 sec
-
32
Keep slight left
559 ft · 9 sec
-
33
Take the exit slight right toward I 95 South, NJTP South: Hackensack
1270 ft · 23 sec
-
34
Keep slight left to continue on I 95 South, NJTP South: Hackensack
1884 ft · 29 sec
-
35
Merge slight left onto New Jersey Turnpike
2 mi · 3 min · New Jersey Turnpike
-
36
Take the exit slight right toward I 80 West: Paterson, Hackensack
1.3 km · 1 min
-
37
Continue on Christopher Columbus Highway
68.2 mi · 1 hr 21 min · Christopher Columbus Highway
-
38
Keep slight left to continue on Keystone Shortway
5.5 mi · 8 min · Keystone Shortway
-
39
Keep slight left to continue on Keystone Shortway
11.9 mi · 16 min · Keystone Shortway
-
40
Take the exit slight right toward I 380 North: Scranton
1.1 km · 46 sec
-
41
Continue straight
27.7 mi · 31 min
-
42
Merge slight right
58.1 mi · 1 hr 9 min
-
43
Keep slight left to continue on I 86: Corning
100 mi · 1 hr 57 min
-
44
Keep slight right to continue on Southern Tier Expressway
60.6 mi · 1 hr 10 min · Southern Tier Expressway
-
45
Turn sharp right onto State Highway 16
1.3 mi · 2 min · State Highway 16
-
46
Continue on Main Street
5.8 mi · 9 min · Main Street
-
47
Continue on State Highway 16
4.9 mi · 7 min · State Highway 16
-
48
Turn left onto Salamanca Sugertown
12.4 mi · 17 min · Salamanca Sugertown
-
49
Arrive at your destination
0 m · 1 sec · Salamanca Sugertown
Car Route Details
A richer read on the saved driving route between Islip and Great Valley.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
I 86
Keep slight left to continue on I 86: Corning
100 mi · 01h 57m
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.
Sunny near Great Valley.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Islip to Great Valley?
The road trip is about 410.5 miles (660.6 km) and usually takes 08h 23m 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?
Riverside is a useful midpoint, sitting about 205 miles from Islip and 205.4 miles from Great Valley.
How much longer is the road route than the straight-line distance?
The direct path is about 299 miles (481.2 km), while the road route adds roughly 111.5 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 arriving, the latest forecast around Great Valley is Sunny.
Stop Ideas Near Riverside
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 Riverside.
Scranton, PA
Wilkes-Barre, PA
White Haven, PA
Flight Path Map
This map shows the direct air route between Islip and Great Valley. Straight-line distance: 298.99 mi (481.17 km).
#1 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 |
#2 Great Valley
Human settlement in Cattaraugus County, New York, United States of America
| Population | 1,946 |
| Coordinates | 42.2145100, -78.6364200 |
| Altitude | 445 |
| Country | United States |
End: Great Valley (-78.63642, 42.21451)
Estimated Travel Time
Distance: 661 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 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.