How far is Islip, NY from Riverhead, NY?
The driving distance from Islip, NY to Riverhead, NY is about 34.2 miles (55 km), with a travel time of about 00h 49m by car.
- The straight-line flight distance is about 31.4 miles (50.6 km).
- For a round trip, plan for roughly 01h 39m 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 00h 49m.
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.
This town in Suffolk County, New York, is the most populous in the state.
Route Weather Snapshot
Check the forecast at both ends before you head out.
Partly Sunny then Slight Chance Rain Showers
Chance Rain Showers
Driving Route Map
The map below follows the saved road route between Islip and Riverhead.
Turn-by-Turn Driving Directions
Step-by-step road directions between Islip and Riverhead.
-
1
Start on Main Street
865 ft · 22 sec · Main Street
-
2
Turn left onto Islip Avenue
1.2 km · 2 min · Islip Avenue
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3
Turn right onto NY 27 East
35 m · 4 sec
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4
Turn straight onto Bittermint Street
777 ft · 29 sec · Bittermint Street
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5
Turn left onto Ferndale Boulevard
47 m · 6 sec · Ferndale Boulevard
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6
Turn right onto Sunrise Highway
1733 ft · 35 sec · Sunrise Highway
-
7
Take the ramp slight left toward NY 27 East
720 ft · 18 sec
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8
Merge slight left onto Sunrise Highway
24.1 mi · 33 min · Sunrise Highway
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9
Take the exit slight right toward CR 51: East Moriches, Riverhead
1266 ft · 31 sec
-
10
Keep slight right to continue on CR 51 South: East Moriches
836 ft · 22 sec
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11
Continue on South Sunrise Highway Service Road
2748 ft · 57 sec · South Sunrise Highway Service Road
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12
Turn left onto Eastport Manor Road
1302 ft · 35 sec · Eastport Manor Road
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13
Turn right onto East Moriches-Riverhead Road
5.3 mi · 7 min · East Moriches-Riverhead Road
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14
Continue on Center Drive South
1.6 mi · 2 min · Center Drive South
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15
Take the ramp straight toward CR 94 east: Downtown Riverhead, Flanders, Hampton Bays
77 m · 5 sec
-
16
Merge slight left onto Nugent Drive
592 ft · 14 sec · Nugent Drive
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17
Enter the roundabout and take exit 4 toward Peconic Avenue
104 m · 20 sec · Peconic Avenue
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18
Exit the roundabout onto Peconic Avenue
830 ft · 23 sec · Peconic Avenue
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19
At the end of the road, turn right onto East Main Street
43 m · 6 sec · East Main Street
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20
Arrive at your destination
0 m · 1 sec · East Main Street
Car Route Details
A richer read on the saved driving route between Islip and Riverhead.
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.
Sunrise Highway
Merge slight left onto Sunrise Highway
24.1 mi · 00h 33m
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 then Slight Chance Rain Showers leaving Islip and Chance Rain Showers near Riverhead.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Islip to Riverhead?
The road trip is about 34.2 miles (55 km) and usually takes 00h 49m 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?
Brookhaven is a useful midpoint, sitting about 17 miles from Islip and 17.1 miles from Riverhead.
How much longer is the road route than the straight-line distance?
The direct path is about 31.4 miles (50.6 km), while the road route adds roughly 2.8 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 8:00 AM to 10:00 AM EDT. If you want a more comfortable same-day return, try to leave by 4:50 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $4.81 one way or $9.62 round trip. Estimated CO2 is about 10.7 kg one way.
What should you check before leaving?
Before you leave, expect Partly Sunny then Slight Chance Rain Showers around Islip and Chance Rain Showers near Riverhead.
Stop Ideas Near Brookhaven
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 Brookhaven.
Bridgeport
Union Station
Stamford Transportation Center
Old Saybrook station
Flight Path Map
This map shows the direct air route between Islip and Riverhead. Straight-line distance: 31.45 mi (50.62 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 Riverhead
Town in New York
| Population | 33,434 |
| Coordinates | 40.9170400, -72.6620400 |
| Altitude | 4 |
| Country | United States |
End: Riverhead (-72.66204, 40.91704)
Estimated Travel Time
Distance: 55 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 08m |
| 40 mph (64.37 km/h) | 00h 51m |
| 50 mph (80.47 km/h) | 00h 41m |
| 60 mph (96.56 km/h) | 00h 34m |
| 70 mph (112.65 km/h) | 00h 29m |
| 80 mph (129 km/h) | 00h 25m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.01 | $4.81 | $9.62 |
| Mid-grade | $4.48 | $5.38 | $10.75 |
| Premium | $4.86 | $5.83 | $11.67 |
| Diesel | $4.69 | $5.63 | $11.27 |
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.