Islip, NY to Louisville, NY is 400.4 miles and takes about 8h 54m via NY 17 and Adirondack Northway, with a fuel budget near $67 and enough daylight to finish in a day. This trip stays within New York, moving from the Northeast region to another part of the Northeast. It's primarily a highway drive, so expect consistent speeds for much of the way. With a recommended two-day pace, you can break up the 400 miles comfortably and avoid a marathon driving day.
Trip Pace
Best split across 2 days
Treat the return leg as its own travel day rather than an afterthought.
Break Rhythm
2 planned breaks
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
200.2 miles from Islip, NY
A natural place for your longest stop of the day
, about 4h 11m into the drive
.
Main Roads
Road
Distance
Duration
NY 17
111.7 mi
2h 8m
Adirondack Northway
71 mi
1h 22m
State Highway 56
38 mi
55m
State Highway 28N
30.3 mi
43m
Southern State Parkway
24.7 mi
31m
Adirondack Trail
19.3 mi
27m
State Route 3
14.8 mi
20m
NJ 17
14.7 mi
18m
Longest stretch:
NY 17
— 111.7 mi, about 2h 8m
Traffic on I-87
Hour-of-day weekday pattern from 46 FHWA count stations on your route.
Peak
4 PM
~2,467 veh/hr typical
· worst 3,399
Quietest
1 AM
~114 veh/hr
Peak-to-quiet ratio
21.6×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 79 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 Islip, NY and Louisville, NY.
1
Start on NY 27A
0.8 mi·1 min·Main Street
2
Continue on Montauk Highway
0.2 mi·19 sec·Montauk Highway
3
Continue on NY 27A
1.1 mi·1 min·Main Street
4
Turn right onto 3rd Avenue
0.6 mi·1 min·3rd Avenue
5
Continue on CR 57
0.3 mi·36 sec·Rossevelt Street
6
Continue on CR 57
0.7 mi·1 min·Howells Road
Use the left lane.
7
Turn straight onto Sunrise Highway
163 ft·3 sec·Sunrise Highway
8
Keep slight right at fork onto CR 57
0.3 mi·36 sec·Howells Road
Toward Howells Road, Deer ParkUse the right lane.
9
Continue on CR 57
0.6 mi·1 min·Bay Shore Road
10
Take the ramp
0.1 mi·19 sec
Toward SO West: New York
11
Continue on this road
363 ft·8 sec·this road
12
Merge onto SO
25 mi·31 min·Southern State Parkway
Use the straight / right lanes.
13
Take the exit
0.3 mi·43 sec
Toward Cross Island Parkway North, Whitestone BridgeUse the slight right lane.
14
Merge onto CI
1.3 mi·1 min·Cross Island Parkway
15
Take the exit
317 ft·9 sec
Exit 26BToward NY 24: UBS Arena-Belmont ParkUse the slight right lane.
16
Keep slight left at fork
437 ft·12 sec
Toward NY 24 West: Hempstead AvenueUse the slight left / slight right lanes.
17
Keep slight right at fork
0.1 mi·15 sec
Toward Cross Island Parkway North, Hempstead Avenue West
18
Keep slight right at fork
266 ft·8 sec
Toward Hempstead Avenue WestUse the slight left / slight right lanes.
19
Continue on this road
0.1 mi·13 sec·this road
Toward Grandstand, Hempstead Avenue West
20
Keep slight left at fork
100 ft·4 sec
Toward Hempstead Avenue
21
Turn right onto NY 24
1.0 mi·2 min·Hempstead Avenue
Use the right lane.
22
Turn left onto Jamaica Avenue
0.1 mi·17 sec·Jamaica Avenue
23
Turn right onto NY 24
0.7 mi·1 min·212th Street
24
Continue on I 295
5.0 mi·5 min·Clearview Expressway
Toward I 295 North: Clearview Expressway, Through Neck BridgeUse the straight / slight right lanes.
25
Continue on I 295
2.0 mi·3 min·Throgs Neck Bridge
26
Continue on I 295
0.7 mi·1 min·Throgs Neck Expressway
Use the straight / slight right lanes.
27
Keep slight left at fork onto I 295
6.6 mi·8 min·Cross Bronx Expressway
Use the straight / slight right lanes.
28
Keep slight left at fork onto I 95; US 1
0.7 mi·1 min·Trans-Manhattan Expressway
Toward Upper Level
29
Continue on I 95; US 1
0.6 mi·59 sec·George Washington Bridge (upper level)
30
Continue on I 95 EXPR; US 1 EXPR; US 9 EXPR
0.5 mi·48 sec·I 95 EXPR; US 1 EXPR; US 9 EXPR
31
Keep slight left at fork onto I 95 EXPR; US 1 EXPR; US 9 EXPR
0.6 mi·39 sec·I 95 EXPR; US 1 EXPR; US 9 EXPR
Use the straight / slight right lanes.
32
Keep slight left at fork onto I 95 EXPR; NJTP
0.1 mi·8 sec·I 95 EXPR; NJTP
33
Take the exit
0.2 mi·22 sec
Toward I 95 South, NJTP South: HackensackUse the straight / slight right lanes.
34
Keep slight right at fork
0.2 mi·23 sec
Exit 72AToward NJ 4 West: ParamusUse the slight left / slight right lanes.
35
Merge onto NJ 4
6.7 mi·9 min·NJ 4
Use the slight right lane.
36
Take the exit
0.2 mi·26 sec
Toward GSP South, NJ 17 South, GSP North, NJ 17 North: Grand State Plaza, Newark, MahwahUse the straight lane.
37
Keep slight right at fork
0.2 mi·36 sec
Toward NJ 17 North: MahwahUse the straight / slight right lanes.
38
Merge onto NJ 17
3.3 mi·4 min·NJ 17
Use the straight / slight right lanes.
39
Continue on NJ 17
7.3 mi·9 min·NJ 17
Use the straight / right lanes.
40
Continue on NJ 17
0.7 mi·50 sec·NJ 17
41
Continue on NJ 17
3.3 mi·4 min·NJ 17
42
Continue on I 287; NY 17
0.2 mi·10 sec·I 287; NY 17
43
Keep slight left at fork onto NY 17
112 mi·2 hr 8 min·NY 17
Toward I 87 North, NY 17 North, New York State Thruway North: AlbanyUse the straight / slight right lanes.
44
Take the exit
0.3 mi·50 sec
Exit 23Toward I 787, US 9W: Albany, TroyUse the slight right lane.
45
Continue on I 787
9.0 mi·12 min·I 787
Use the straight / slight right lanes.
46
Keep slight left at fork onto NY 787
0.4 mi·29 sec·NY 787
47
Take the exit
0.3 mi·50 sec
Exit 9WToward NY 7 West: Schenectady, Saratoga SpringsUse the right lane.
48
Merge onto NY 7
3.1 mi·3 min·NY 7
49
Take the exit
0.8 mi·1 min
Toward I 87 North: Saratoga Springs, Glens Falls
50
Merge onto I 87
71 mi·1 hr 22 min·Adirondack Northway
51
Take the exit
0.3 mi·30 sec
Exit 26Toward US 9: Pottersville, Minerva
52
Turn left onto Valley Farm Road
0.4 mi·50 sec·Valley Farm Road
53
At end of road, turn right onto US 9
0.2 mi·32 sec·US 9
54
Turn slight left onto CR 19
4.8 mi·7 min·Olmstedville Road
55
Continue on CR 29
1.2 mi·1 min·County Highway 29
56
Keep slight right at fork onto Donnelly Road
0.6 mi·1 min·Donnelly Road
57
Continue on CR 30
2.8 mi·4 min·A P Morse Highway
58
Turn straight onto NY 28N
30 mi·41 min·State Highway 28N
59
Continue on NY 28N
2.5 mi·3 min·Newcomb Road
60
Continue on NY 28N
0.7 mi·1 min·State Highway 28N
61
Turn right onto NY 30
0.4 mi·52 sec·Adirondack Trail
62
Turn slight left onto NY 30
0.3 mi·39 sec·Lake Street
63
Continue on NY 30
18 mi·25 min·Adirondack Trail
64
Continue on NY 30
0.5 mi·46 sec·Moody Road
65
Continue on NY 30
0.8 mi·1 min·Adirondack Trail
66
Continue on NY 30
1.9 mi·3 min·Wawbeek Avenue
67
Turn right onto NY 30
0.2 mi·33 sec·Park Street
68
Turn left onto NY 3
282 ft·13 sec·Mill Street
69
Turn right onto NY 3
0.1 mi·24 sec·Lake Street
70
Continue on NY 3
1.2 mi·2 min·Demars Boulevard
71
Continue on NY 3
1.0 mi·2 min·Main Street
72
Continue on NY 3
15 mi·20 min·State Route 3
73
Turn right onto NY 56
31 mi·47 min·State Highway 56
74
Continue on NY 56
1.0 mi·2 min·Pierrepont Avenue
75
Turn left onto NY 56
0.2 mi·39 sec·Main Street
76
At end of road, turn right onto NY 56
1.2 mi·3 min·Market Street
77
Continue on NY 56
3.6 mi·4 min·State Highway 56
78
Continue on NY 56
4.8 mi·5 min·South Main Street
79
Continue on NY 56
3.0 mi·3 min·State Highway 56
80
Turn left onto NY 310
318 ft·5 sec·State Highway 310
81
Turn right onto Louisville-Raymondville Road
3.8 mi·13 min·Louisville-Raymondville Road
82
Arrive at destination
Louisville-Raymondville Road
Trip Plan
Given the 8-hour drive time and 400-mile distance, splitting this trip over two days is a smart move. Aim to depart relatively early to maximize your daylight hours. Plan for two stops along the way to stretch your legs and refuel. The longest continuous stretch is over 111 miles on NY 17, so ensure you're comfortable with that duration before you hit it. Keep an eye on your fuel gauge, especially as you transition off the main highways.
Morning Departure
Start early — leave by 6-7 AM to arrive at a reasonable hour.
Evening Departure
This is a long drive — plan for a morning departure or consider splitting it into two days.
This drive is better paced as a 2-day trip.
Plan roughly 2 meaningful breaks for fuel, food, and rest.
The halfway point lands around 200.2 miles from Islip, NY, or about 4h 11m into the drive.
The longest continuous stretch on this route runs about 111.7 miles.
Consider an overnight stop or starting very early.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 88 miles or 1h 58m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 200.2 miles or 4h 11m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Overnight split
Day 1 wrap after about 200.2 miles or 4h 11m
Stop before fatigue turns the last few hours into a grind. You want day two to start fresh, not just resumed.
Final approach
Final hour starts around 7h 18m
Traffic, exits, and arrival timing usually matter more near Louisville, NY than in the middle of the route.
Before You Leave
+
Open the route before leaving Islip, NY so your first major turns are already loaded.
+
Leave with enough water and a charging cable within reach, not packed away.
+
Check your fuel range against the first long segment, especially if you are starting outside city service areas.
+
Pick one backup stop option before the midpoint in case traffic changes your pacing.
+
Treat this as a 2-day road trip and book the overnight stop before the busiest arrival window.
Day 1
Settle into the route from Islip, NY
Aim for roughly 200 miles and 4.5 hours of wheel time on this day.
Day 2
Finish the approach into Louisville, NY
Aim for roughly 200 miles and 4.5 hours of wheel time on this day.
Your first comfortable stop window is around 88 miles from Islip, NY.
This route usually feels better as a 2-day drive than as one long push.
Plan about 2 real breaks rather than only quick fuel stops.
The longest stretch is on NY 17 for about 111.7 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Place data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 45
5 decision points cluster between mile 3.6 and 50.3 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
9
3.6 mi into trip|~6m in|CR 57 / Howells Road
Keep slight right at fork onto CR 57 / Howells Road toward Howells Road, Deer Park
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the right lane.
Toward Howells Road, Deer Park
8
31.1 mi into trip|~43m in
Keep slight left at fork toward NY 24 West: Hempstead Avenue
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight left / slight right lanes.
Toward NY 24 West: Hempstead Avenue
8
31.2 mi into trip|~43m in
Keep slight right at fork toward Hempstead Avenue West
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight left / slight right lanes.
Toward Hempstead Avenue West
8
50 mi into trip|~1h 10m in
Take the exit toward I 95 South, NJTP South: Hackensack
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Toward I 95 South, NJTP South: Hackensack
9
50.3 mi into trip|~1h 11m in
Keep slight right at fork toward NJ 4 West: Paramus
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight left / slight right lanes.
Exit 72A
Toward NJ 4 West: Paramus
Fuel & Cost
Regular Gas
$70.09 one way
$140.17 round trip
$4.45/gal25.4 MPG avg140 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.82
$75.95
$151.90
premium
$5.23
$82.44
$164.89
diesel
$6.28
$98.93
$197.87
Estimated Tolls: $22.55
George Washington Bridge
$16.00
Throgs Neck Bridge
$6.55
Toll estimates based on average 2024-2025 rates. EZ-Pass/SunPass discounts may lower the actual cost.
Estimated Trip Cost (one way, 1 person)
Fuel
$70
Tolls
$23
Hotel (1n)
$80–$140
Meals
$50–$100
Total
$223–$333
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 140.1 kg one way.
Prices: EIA weekly data, 2026-10-19.
Driving Electric?
About $42 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
120.1
1
$42.04
$19.22
Efficient EV
100.1
1
$35.04
$16.02
EV Truck/SUV
160.2
2
$56.06
$25.63
Gas CO2
140 kg
EV CO2
47 kg (66% less)
Plan for 1 charging stop. A 30-minute DC fast charge mid-route should be enough to complete the trip comfortably.
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 Oct 22, 2026
Origin
Islip, NY
Afternoon
in Islip on Saturday
Local time
3:02 PM
EDT
Current temp
64°F
Sunny
N 13 mph0% chanceLive forecast
Destination
Louisville, NY
Afternoon
in Louisville on Saturday
Local time
3:02 PM
EDT
Current temp
56°F
Partly Sunny
NW 2 to 6 mph0% chanceLive forecast
Seasonal Notes
Summer travel usually means heavier construction, hotter rest stops, and busier weekend traffic around major cities.
Winter travel shortens daylight, so a route that looks manageable on paper can feel much longer after dark.
Holiday weekends tend to make both departure and arrival windows slower than the raw route time suggests.
For long drives, weather on day two can matter just as much as conditions at departure, so check the whole travel window rather than only the first day.
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
8 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
8h 54m on the road
This is long enough that the arrival forecast matters almost as much as departure conditions. Recheck both ends before you roll.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
National Parks Near This Route
Worth a detour if your schedule allows.
Hamilton Grange National Memorial
National Memorial
Merchant’s clerk, Revolutionary War soldier, first Secretary Treasury of the United States: Alexander Hamilton’s life is memorialized at The Grange, the home he built on a country estate in uptown Man...
7 mi from route
~17 min detour
Free
near mile 41.4
The final resting place of President Ulysses S. Grant and his wife, Julia, is the largest mausoleum in North America. It testifies to a people’s gratitude for the man who ended the bloodiest conflict...
8 mi from route
~19 min detour
Free
near mile 41.4
In 1777, a large British invasion force met an equally large American army here at Saratoga. After two intense battles, an eight-mile retreat, and a three-day siege, British General John Burgoyne surr...
8 mi from route
~21 min detour
Free
near mile 220.9
Immerse yourself in an enchanting collage of coastal life and history. Rhythmic waves, high dunes, ancient maritime forests, historic landmarks and glimpses of wildlife, Fire Island has been a special...
Before the 1960s, almost everything about living authentically as a lesbian, a bisexual person or a gay man was illegal. The Stonewall Uprising on June 28, 1969 is a milestone in the quest for civil r...
11 mi from route
~28 min detour
Free
near mile 41.4
The African Burial Ground stands as the oldest and largest known excavated burial site in North America for both free and enslaved Africans. It offers a profound testament to the enduring legacy of Af...
12 mi from route
~31 min detour
Free
near mile 41.4
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
This route covers 400.4 miles with 68% on highways. You'll experience 111.7 miles on NY 17 as the longest stretch before transitioning to other roads. The majority of your time will be spent on the Adirondack Northway, which means you can expect a good amount of consistent cruising. Be mindful of the exits and potential for merging as you move between these main arteries.
68% highway — fuel and pacing are the main things to plan.
82 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 111.7 mi on NY 17.
How Hard Is This Drive?
10/10
This is a straightforward highway drive that stays mostly on NY 17 and Adirondack Northway. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 3.6 miles in near CR 57 / Howells Road.
Driving Effort10/10
High effort - long or complex enough to need steady focus all day
Balances navigation complexity with total wheel time.
This is a demanding drive. With 45 significant decision points across 400.4 miles, you will need to stay alert - especially through interchange areas and urban stretches. Consider splitting it into segments if you are not comfortable with fast highway navigation.
Where does it get tricky?
The main spots that need attention: at 3.6 miles (CR 57 / Howells Road): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 31.1 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 31.2 miles: Highway fork - watch signs carefully. Lane positioning matters here.
Elevation Profile
Gently rolling terrain
1,763 ft12 ft
Total Climb
2,100 ft
Total Descent
1,896 ft
Highest Point
1,763 ft
~314.6 mi in
Elevation Range
1,750 ft
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Islip, NY and Louisville, NY, road signs point toward Cross Island Parkway North, Hempstead Avenue West, Grandstand, Upper Level, Njtp South: Hackensack and Gsp South - among others.
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
The longest stretch is about 111.7 miles on NY 17. The full list of main roads is in the Roads section above.
Yes — a 2-day pace is more comfortable than one long haul. A sensible stopping point is after roughly 200 miles on day one.
Expect about $22.55 in tolls one way, starting with George Washington 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.
Yes — we found about 19 rest areas or service plazas within a short detour of the route (from OpenStreetMap). See the Rest Stops tab under Nearby Places for locations and mile markers. Plan to stretch, use the bathroom, and top off fluids every 2–3 hours on longer drives.
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 Louisville, NY before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.
Only with planning. This is a long drive for kids — consider splitting it into two days rather than pushing through. Plan at least 2 meaningful breaks. There are 19 rest areas along the route for bathroom stops.
The main spots that need attention: at 3.6 miles (CR 57 / Howells Road): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 31.1 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 31.2 miles: Highway fork - watch signs carefully. Lane positioning matters here.
Yes — Hamilton Grange National Memorial, General Grant National Memorial and Saratoga National Historical Park (6 total within detour distance). See the National Parks section for detour distances and tips on detours.
Not recommended in a single day. At 8.9 hours each way, a round trip means 17.8 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Louisville, NY before the return drive.
