How far is Islip, NY from Mastic, NY?
The driving distance from Islip, NY to Mastic, NY is about 21.3 miles (34.2 km), with a travel time of about 00h 31m by car.
- The straight-line flight distance is about 19.9 miles (32.1 km).
- For a round trip, plan for roughly 01h 03m 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 31m.
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.
Village 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 Islip and Mastic.
Turn-by-Turn Driving Directions
Step-by-step road directions between Islip and Mastic.
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1
Start on Main Street
865 ft · 22 sec · Main Street
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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
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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
17.5 mi · 24 min · Sunrise Highway
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9
Take the exit slight right toward CR 46: William Floyd Parkway South, Shirley
1333 ft · 35 sec
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10
At the end of the road, turn right onto William Floyd Parkway
815 ft · 21 sec · William Floyd Parkway
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11
Turn left onto Montauk Highway
1.3 mi · 2 min · Montauk Highway
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12
Turn right onto Pershing Street
1575 ft · 56 sec · Pershing Street
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13
At the end of the road, turn left onto Mastic Boulevard
155 m · 14 sec · Mastic Boulevard
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14
Arrive at your destination
0 m · 1 sec · Mastic Boulevard
Car Route Details
A richer read on the saved driving route between Islip and Mastic.
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
17.5 mi · 00h 24m
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 Islip and Rain Showers Likely near Mastic.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Islip to Mastic?
The road trip is about 21.3 miles (34.2 km) and usually takes 00h 31m 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?
Patchogue is a useful midpoint, sitting about 10.6 miles from Islip and 10.6 miles from Mastic.
How much longer is the road route than the straight-line distance?
The direct path is about 19.9 miles (32.1 km), while the road route adds roughly 1.4 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 7:26 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $3.01 one way or $6.01 round trip. Estimated CO2 is about 6.7 kg one way.
What should you check before leaving?
Before you leave, expect Rain Showers Likely around Islip and Rain Showers Likely near Mastic.
Stop Ideas Near Patchogue
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 Patchogue.
Bridgeport
Stamford Transportation Center
Union Station
New Rochelle station
Flight Path Map
This map shows the direct air route between Islip and Mastic. Straight-line distance: 19.96 mi (32.13 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 Mastic
Census-designated place in Suffolk County, New York
| Population | 15,481 |
| Coordinates | 40.8020400, -72.8409400 |
| Altitude | 9 |
| Country | United States |
End: Mastic (-72.84094, 40.80204)
Estimated Travel Time
Distance: 34 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 00h 42m |
| 40 mph (64.37 km/h) | 00h 31m |
| 50 mph (80.47 km/h) | 00h 25m |
| 60 mph (96.56 km/h) | 00h 21m |
| 70 mph (112.65 km/h) | 00h 18m |
| 80 mph (129 km/h) | 00h 15m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.01 | $3.01 | $6.01 |
| Mid-grade | $4.48 | $3.36 | $6.72 |
| Premium | $4.86 | $3.65 | $7.29 |
| Diesel | $4.69 | $3.52 | $7.04 |
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.