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Trip from Harrison, NY to Islip, NY

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Compiled and reviewed by the US Trip Planner planning team at COD Solutions Oy · Last reviewed Apr 26, 2026 · Editorial standards

Drive Time

1h 21m

Distance

55.4 mi

89 km

Drive Score

9/10

Great drive

Same Day?

Yes, doable

Fuel Cost

$9

one way

EV Charging

Unknown

Best Time to Leave

Save up to 19 min
4 AM
1h 15m ★
6 AM
1h 21m
8 AM
1h 34m
10 AM
1h 26m
12 PM
1h 25m
3 PM
1h 27m
5 PM
1h 34m
8 PM
1h 18m

Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.

Best Time Drive vs Fly
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community (coterminous town-village) in Westchester County, New York, United States

Harrison, NY

Wikimedia Commons

town in Suffolk County, New York, United States

Islip, NY

Wikimedia Commons

Trip Overview

Harrison, NY to Islip, NY is 55.4 miles and takes about 1 hour 21 minutes via Southern State Parkway, New England Thruway, and Clearview Expressway, with a fuel budget near $9 and enough daylight to finish in a day. This trip stays within New York, making it a straightforward drive between two points in the Northeast region. Given its relatively short distance and highway profile, this route is well-suited for a single-day excursion. Consider this option when you need to get from Westchester County to Long Island efficiently without extensive planning.

Main Roads

Road Distance Duration
Southern State Parkway 24.7 mi 31m
New England Thruway 5.8 mi 8m
Clearview Expressway 5 mi 5m
East Boston Post Road 3.2 mi 5m
Throgs Neck Expressway 2.2 mi 3m
Throgs Neck Bridge 2 mi 3m
East Main Street 1.7 mi 2m
Bruckner Expressway 1.3 mi 2m
Longest stretch: Southern State Parkway — 24.7 mi, about 31m

Traffic on I-295

Hour-of-day weekday pattern from 11 FHWA count stations on your route.

Peak

4 PM

~1,766 veh/hr typical · worst 2,167

Quietest

2 AM

~199 veh/hr

Peak-to-quiet ratio

8.9×

busier at peak than in the quiet hours

12a 6a noon 6p 11p

Averaged across 48 weeks of 2023 FHWA Travel Monitoring Analysis System data. Weekday hours only (Mon–Fri).

Turn-by-Turn Driving Directions

Step-by-step road directions between Harrison, NY and Islip, NY.

1

Start on Halstead Avenue

50 ft · 8 sec · Halstead Avenue
2

Turn left onto NY 127

1.0 mi · 2 min · Harrison Avenue
3

Continue on NY 127

0.3 mi · 30 sec · Keeler Avenue
4

Turn straight onto US 1

3.2 mi · 5 min · East Boston Post Road
5

Continue on US 1

0.6 mi · 1 min · East Main Street
6

Continue on US 1

0.2 mi · 25 sec · Huguenot Street
7

Turn right onto River Street

0.3 mi · 37 sec · River Street
Use the straight / left lanes.
8

Continue on Cedar Street

369 ft · 7 sec · Cedar Street
9

Take the ramp

0.2 mi · 20 sec
Toward I 95 South: New York
10

Merge onto I 95

5.8 mi · 8 min · New England Thruway
Use the straight / slight right lanes.
11

Continue on I 95

1.3 mi · 2 min · Bruckner Expressway
Use the straight / right lanes.
12

Keep slight left at fork onto I 695

2.2 mi · 3 min · Throgs Neck Expressway
Exit 7A Toward I 695 South: Throgs Neck Bridge, Long Island Use the slight left / slight right lanes.
13

Continue on I 295

2.0 mi · 3 min · Throgs Neck Bridge
Use the straight / slight right lanes.
14

Continue on I 295

5.0 mi · 5 min · Clearview Expressway
Use the straight / slight right lanes.
15

Continue on NY 24

0.7 mi · 1 min · Hollis Court Boulevard
Use the straight lane.
16

At end of road, turn left onto NY 24

0.2 mi · 35 sec · Jamaica Avenue
Use the left lane.
17

Turn right onto Hempstead Avenue

0.9 mi · 2 min · Hempstead Avenue
18

Turn right onto 225th Street

228 ft · 9 sec · 225th Street
Use the right lane.
19

Take the ramp

0.2 mi · 28 sec
Toward Cross Island Parkway South, Verrazano Bridge
20

Merge onto CI

1.3 mi · 1 min · Cross Island Parkway
Use the straight / slight right lanes.
21

Take the exit

0.5 mi · 1 min
Exit 25A Toward Southern State Parkway East, Eastern Long Island Use the slight left / straight lanes.
22

Merge onto SO

25 mi · 31 min · Southern State Parkway
Use the straight / slight right lanes.
23

Keep slight left at fork onto SO

0.2 mi · 16 sec · Southern State Parkway
Use the straight / slight right lanes.
24

Take the exit

0.2 mi · 31 sec
Exit 41S Toward Bay Shore Road South, Bay Shore Use the slight right lane.
25

Turn straight onto CR 57

0.5 mi · 1 min · Bay Shore Road
26

Continue on CR 57

0.3 mi · 43 sec · Howells Road
27

Turn straight onto CR 57

341 ft · 6 sec · Sunrise Highway
28

Keep slight right at fork onto CR 57

0.6 mi · 1 min · Howells Road
Toward Howells Road South Use the right lane.
29

Continue on CR 57

0.2 mi · 24 sec · Roosevelt Street
30

Continue on CR 57

0.7 mi · 1 min · 3rd Avenue
31

At end of road, turn left onto NY 27A

1.1 mi · 1 min · East Main Street
32

Continue on Montauk Highway

0.2 mi · 17 sec · Montauk Highway
33

Continue on NY 27A

0.8 mi · 1 min · Main Street
34

Arrive at destination

NY 27A

Where to Stop

Rest stops, refuel points, and overnight suggestions along this route.

census-designated place in Nassau County, New York

Mid-route town

Meal stop

North New Hyde Park, NY

28 mi into the route

Best for: Lunch, fuel, and a longer reset

This sits close to the middle of the route, so it works well for the longest stop of the day.

Pacing Suggestions

The Bronx, NY

Fuel and coffee

A short stop after about 12 miles helps settle the day before fatigue starts building.

North New Hyde Park, NY

Meal break

The midpoint is around 27.7 miles from Harrison, NY, which is a good place for a longer meal and fuel stop.

These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.

Heads-up: tricky spots

5 of 16

5 decision points cluster between mile 13 and 51.9 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.

9
13 mi into trip | ~21m in | I 695 / Throgs Neck Expressway

Keep slight left at fork onto I 695 / Throgs Neck Expressway toward I 695 South: Throgs Neck Bridge, Long Island

Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one

Use the slight left / slight right lanes. Exit 7A Toward I 695 South: Throgs Neck Bridge, Long Is...
8
25.6 mi into trip | ~39m in

Take the exit toward Southern State Parkway East, Eastern Long Island

Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one

Use the slight left / straight lanes. Exit 25A Toward Southern State Parkway East, Eastern Lon...
6
50.6 mi into trip | ~1h 12m in | SO / Southern State Parkway

Keep slight left at fork onto SO / Southern State Parkway

Highway fork - watch signs carefully. Lane positioning matters here

Use the straight / slight right lanes.
9
50.8 mi into trip | ~1h 12m in

Take the exit toward Bay Shore Road South, Bay Shore

Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one

Use the slight right lane. Exit 41S Toward Bay Shore Road South, Bay Shore
7
51.9 mi into trip | ~1h 14m in | CR 57 / Howells Road

Keep slight right at fork onto CR 57 / Howells Road toward Howells Road South

Highway fork - watch signs carefully. Lane positioning matters here

Use the right lane. Toward Howells Road South

Fuel & Cost

Regular Gas

$9.00 one way

$18.01 round trip

$4.13/gal 25.4 MPG avg 19 kg CO2
Fuel Type $/gal One Way Round Trip
midgrade $4.47 $9.75 $19.49
premium $4.87 $10.61 $21.23
diesel $5.40 $11.78 $23.57

Estimated Tolls: $6.96

Throgs Neck Bridge $6.55
New England Thruway (5.8 mi) $0.41

Toll estimates based on average 2024-2025 rates. EZ-Pass/SunPass discounts may lower the actual cost.

Drive Cost (one way)

Fuel

$9

Tolls

$7

Total

$16

Estimated CO2 emission: 19.4 kg one way. Prices: EIA weekly data, 2026-04-20.

Driving Electric?

About $6 in charging · 0 stops · 68% less CO2

Vehicle Type kWh Stops DC Fast Home Charge
Average EV 16.6 0 $5.82 $2.66
Efficient EV 13.9 0 $4.85 $2.22
EV Truck/SUV 22.2 0 $7.76 $3.55

Gas CO2

19 kg

EV CO2

6 kg (68% less)

This trip is well within single-charge range for most EVs. No charging stops needed if you start fully charged.

DC fast charging avg $0.35/kWh. Home charging avg $0.16/kWh. US grid CO2: 0.39 kg/kWh.

Travel Intel

Current conditions at both ends of the drive.

Forecast as of Apr 26, 2026

Origin

Harrison, NY

Late night in Harrison on Sunday

Local time

3:47 AM

EDT

Current temp

41°F

Rain Showers

E 9 mph 97% chance Live forecast

Flood Warning

Flood Warning issued April 25 at 8:05PM EDT until April 26 at 11:00AM EDT by NWS Buffalo NY

Flood Warning

Flood Warning issued April 25 at 1:03PM EDT by NWS Binghamton NY

Destination

Islip, NY

Late night in Islip on Sunday

Local time

3:47 AM

EDT

Current temp

40°F

Rain Showers

E 10 mph 97% chance Live forecast

Flood Warning

Flood Warning issued April 25 at 8:05PM EDT until April 26 at 11:00AM EDT by NWS Buffalo NY

Flood Warning

Flood Warning issued April 25 at 1:03PM EDT by NWS Binghamton NY

Time zone

Same local time

Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.

Temperature spread

1 degrees cooler at arrival

A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.

Road read

1h 21m on the road

The weather snapshot is not static. If you are leaving later, give both cities one more quick forecast check before departure.

Weather data from the National Weather Service. Conditions may change; check closer to your travel date.

What kind of drive is this?

Expect to spend about 62% of your time on the highway. The longest continuous stretch on this route is 24.7 miles, all on the Southern State Parkway. You'll experience a predominantly highway driving environment, transitioning to surface roads as you approach your destination. The density of exits and merging traffic will be a noticeable aspect of this drive.

62% highway — fuel and pacing are the main things to plan.
34 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 24.7 mi on Southern State Parkway.

How Hard Is This Drive?

10/10

This is a straightforward highway drive that stays mostly on Southern State Parkway and New England Thruway. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 13 miles in near I 695 / Throgs Neck Expressway.

Driving Effort 10/10

Demanding - stay alert through the decision-heavy sections

Balances navigation complexity with total wheel time.

This drive requires moderate attention. Across 55.4 miles you will encounter 16 spots where lane choice or exit timing matters. Not difficult for experienced highway drivers, but worth previewing the tricky sections before you go.

Where does it get tricky?

The main spots that need attention: at 13 miles (I 695 / Throgs Neck Expressway): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 25.6 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 50.6 miles (SO / Southern State Parkway): Highway fork - watch signs carefully. Lane positioning matters here.

Towns Mentioned on Route Signs

Based on OSRM destination-sign hints, not a full list of every settlement the road passes.

Between Harrison, NY and Islip, NY, road signs point toward Long Island, Cross Island Parkway South, Southern State Parkway East, Eastern Long Island, Bay Shore Road South and Bay Shore - among others.

Long Island

13 mi in | ~21m | via I 695

Cross Island Parkway South

24.1 mi in | ~37m

Southern State Parkway East

25.6 mi in | ~39m

Eastern Long Island

25.6 mi in | ~39m

Bay Shore Road South

50.8 mi in | ~1h 12m

Bay Shore

50.8 mi in | ~1h 12m

Howells Road South

51.9 mi in | ~1h 14m | via CR 57

About the Cities

Starting in Harrison, NY

Full guide →

Founded 1696

Harrison is a town and village in Westchester County, New York.

Arriving in Islip, NY

Full guide →

Founded 1683

Islip (pronounced "ICE-lip") is a town on Long Island in the state of New York. Located within Suffolk County, the Town of Islip includes the villages of Brightwaters, Islandia, Ocean Beach and Saltaire. It also includes numerous hamlets including Bay Shore and Sayville which are ferry terminals for Fire Island. Other prominent communities are Bayport, Brentwood, Central Islip, Hauppauge, Islip village (the town seat), and Ronkonkoma.

Top landmarks

  • • Bayport Aerodrome — airport in Suffolk County, New York, United States
  • • Connetquot River State Park Preserve — state park in New York
  • • Modesty — oyster-dredging sloop built in Long Island

City content from Wikivoyage (CC BY-SA 4.0) and Wikidata (CC0).

Who Is This Route For?

Weekend Trip

Doable as a same-day drive at 1h 21m. Total distance: 55.4 miles.

Family Friendly

Moderate complexity with 0 natural rest stops along the way.

Solo Traveler

1h 21m drive, comfortable solo distance.

EV Driver

0 DC fast chargers along the route. Coverage: unknown.

First-Time Driver

Mostly highway driving (62%). Some complex stretches to watch for.

Frequently Asked Questions

The longest stretch is about 24.7 miles on Southern State Parkway. The full list of main roads is in the Roads section above.

Expect about $6.96 in tolls one way, starting with Throgs Neck Bridge. Most Northeast and Midwest toll agencies accept E-ZPass; in the West and Texas, transponders like TxTag or FasTrak apply. If you do not have a transponder, cashless tolling plates will mail a bill to the vehicle's registered address — usually with a surcharge, so a rental-car toll pass is often cheaper than paying by mail.

It helps. This route has a higher-than-average number of complex decision points, which get harder in the dark. If the last hour of the trip is on surface roads or mountain grades, aim to arrive at Islip, NY before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.

Yes. At under 2 hours behind the wheel, this works well for families — plan one quick stop if you have younger kids.

The main spots that need attention: at 13 miles (I 695 / Throgs Neck Expressway): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 25.6 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 50.6 miles (SO / Southern State Parkway): Highway fork - watch signs carefully. Lane positioning matters here.

Yes — General Grant National Memorial, Hamilton Grange National Memorial and Fire Island National Seashore (6 total within detour distance). See the National Parks section for detour distances and tips on detours.

Yes. A round trip is manageable in a single day if you plan a break at Islip, NY before heading back.

How this page is built

Compiled by the US Trip Planner planning team at COD Solutions Oy from open government datasets — OSRM over OpenStreetMap for geometry, EIA for fuel prices, NPS for national parks, and FHWA TMAS for hourly traffic volumes. See our methodology for refresh cadence and limitations.

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