This 308.5-mile drive from Port Byron, NY, to Islip, NY, is estimated to take about 6 hours and 38 minutes, making it a manageable one-day trip. The route primarily utilizes I 81 and the Southern State Parkway, with a portion on the Keystone Shortway, covering 59% on highways. With an estimated fuel cost of $51, this journey is budget-friendly for a single day. The overall feel is a turn-heavy local drive, so plan for a slightly more involved navigation experience than a pure interstate cruise. Given its duration and profile, it’s well-suited for completion within a single day.
Trip Pace
Same-day drive is realistic
A same-day return is possible, but it will make for a full day on the road.
Break Rhythm
1 planned break
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
154.3 miles from Port Byron, NY
A natural place for your longest stop of the day
, about 3h 22m into the drive
.
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
Doable as a same-day drive at 6h 38m. Total distance: 308.5 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
6h 38m drive, plan rest stops for pacing.
Scenic Drive
Turn-heavy local drive route profile with national parks nearby.
Drive Character
Expect a dynamic driving experience on this route, blending 59% highway travel with more engaging local road segments. The longest uninterrupted stretch you'll encounter is 98.8 miles on I 81, offering a period of steady cruising. However, the profile is described as 'turn-heavy local drive,' indicating that you'll navigate numerous turns and potentially varying road conditions as you transition between major arteries and local routes. This isn't a monotonous interstate journey; be prepared for a more interactive drive that requires consistent attention.
This route has more turning and local-road decision points than a simple highway run.
There are about 60 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
I 81 is the longest continuous segment at about 98.8 miles.
How Hard Is This Drive?
Expect a hands-on drive with frequent turns and local roads rather than long highway stretches. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 141.5 miles in near US 6.
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 35 significant decision points across 308.5 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 141.5 miles (US 6): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 256.1 miles: Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 256.3 miles: Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Critical Maneuvers
5 of 35 key points
These are the spots where you need to pay the most attention. Preview them before you drive.
9
141.5 mi into trip|~3h 7m in|US 6
Keep slight right at fork onto US 6 toward I 84 East, I 380 South, US 6 East: Carbondale, Mt Pocono
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight left / slight right lanes.
Exit 187
Toward I 84 East, I 380 South, US 6 East: Carbo...
8
256.1 mi into trip|~5h 23m in
Keep slight left at fork toward I 95 North: George Washington Bridge, New York City
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Toward I 95 North: George Washington Bridge, Ne...
9
256.3 mi into trip|~5h 24m in
Keep slight right at fork toward Leonia, Teaneck
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Exit 70A-B
Toward Leonia, Teaneck
8
265.8 mi into trip|~5h 38m in|I 295 / Cross Bronx Expressway
Keep slight right at fork onto I 295 / Cross Bronx Expressway toward I 295 South: Throgs Neck Bridge
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight left lanes.
Exit 6B
Toward I 295 South: Throgs Neck Bridge
9
303.9 mi into trip|~6h 30m 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
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Port Byron, NY and Islip, NY, road signs point toward Mt Pocono, Milford, New York City, Leonia, Teaneck and George Washington Bridge Upper Level - among others.
Mt Pocono
141.5 mi in|~3h 7m|via US 6
Milford
142.3 mi in|~3h 8m|via I 84; I 380
New York City
256.1 mi in|~5h 23m
Leonia
256.3 mi in|~5h 24m
Teaneck
256.3 mi in|~5h 24m
George Washington Bridge Upper Level
258.6 mi in|~5h 28m
Cross Island Parkway South
277.2 mi in|~5h 54m
Southern State Parkway East
278.7 mi in|~5h 57m
Eastern Long Island
278.7 mi in|~5h 57m
Main Roads
Road
Distance
Duration
I 81
98.8 mi
1h 57m
Keystone Shortway
80 mi
1h 37m
Southern State Parkway
24.7 mi
31m
I 380
23.6 mi
25m
East Lake Road
9.9 mi
14m
State Highway 41
9.8 mi
13m
State Street Road
7.3 mi
13m
Cross Bronx Expressway
6.6 mi
8m
Longest stretch:
I 81
— 98.8 mi, about 1h 57m
Turn-by-Turn Driving Directions
Step-by-step road directions between Port Byron, NY and Islip, NY.
1
Start on NY 38
0.4 mi·44 sec·Main Street
2
Continue on NY 38
7.3 mi·13 min·State Street Road
3
Turn left onto Dill Street
0.1 mi·21 sec·Dill Street
4
Continue on Loop Road
458 ft·16 sec·Loop Road
5
Turn left onto Genesee Street
5.5 mi·9 min·Genesee Street
6
Continue on US 20
2.2 mi·4 min·West Genesee Street Road
7
Turn right onto NY 41
0.5 mi·45 sec·East Lake Street
8
Continue on NY 41
9.4 mi·13 min·East Lake Road
9
Continue on NY 41
4.8 mi·7 min·State Route 41
10
Continue on NY 41
0.5 mi·49 sec·East Lake Road
11
Continue on NY 41
9.8 mi·13 min·State Highway 41
12
Turn right onto NY 281
1.2 mi·2 min·North West Street
13
Take the ramp
0.7 mi·1 min
Use the left lane.
14
Keep slight right at fork
0.3 mi·34 sec
Toward I 81 South: Binghamton
15
Merge onto I 81
45 mi·54 min·I 81
Use the straight / slight right lanes.
16
Keep slight right at fork onto I 81
53 mi·1 hr 3 min·I 81
Toward I 81 South: ScrantonUse the straight lane.
17
Keep slight right at fork onto US 6
0.8 mi·1 min·US 6
Exit 187Toward I 84 East, I 380 South, US 6 East: Carbondale, Mt PoconoUse the slight left / slight right lanes.
18
Continue on I 84; I 380
3.7 mi·4 min·I 84; I 380
Toward I 84 East, I 380 South: Mount Pocono, MilfordUse the straight lane.
19
Keep slight right at fork onto I 380
24 mi·25 min·I 380
Exit 4Toward I 380 South: Mount Pocono
20
Keep slight left at fork
1.0 mi·1 min
Exit 1BToward I 80 East: Stroudsburg
21
Merge onto I 80
80 mi·1 hr 37 min·Keystone Shortway
Use the straight / right lanes.
22
Keep slight right at fork onto I 80
5.5 mi·5 min·Christopher Columbus Highway
Toward I 95: George Washington Bridge Lower LevelUse the slight right lane.
23
Keep slight left at fork
0.3 mi·23 sec
Toward I 95 North: George Washington Bridge, New York CityUse the straight / slight right lanes.
24
Keep slight right at fork
0.4 mi·38 sec
Exit 70A-BToward Leonia, TeaneckUse the slight right lane.
25
Turn right
0.2 mi·35 sec
Exit 70AToward LeoniaUse the straight / slight right lanes.
26
Turn straight onto CR 56
454 ft·9 sec·Degraw Avenue
27
Continue on CR 56
1.1 mi·2 min·Fort Lee Road
Use the straight / right lanes.
28
Continue on CR 56
469 ft·13 sec·Main Street
29
Take the ramp
472 ft·12 sec
Toward George Washington Bridge
30
Merge onto US 1; US 9; US 46
0.3 mi·28 sec·Bergen Boulevard
Use the straight / slight right lanes.
31
Take the exit
312 ft·4 sec
Toward George Washington Bridge Upper Level
32
Merge onto I 95 EXPR
0.3 mi·20 sec·I 95 EXPR
Use the straight / slight right lanes.
33
Keep slight left at fork onto I 95 EXPR
0.8 mi·1 min·I 95 EXPR
34
Continue on I 95; US 1; US 9
0.6 mi·1 min·George Washington Bridge (upper level)
Use the straight / slight right lanes.
35
Continue on I 95; US 1
0.7 mi·1 min·Trans-Manhattan Expressway
36
Continue on I 95; US 1
4.7 mi·6 min·Cross Bronx Expressway
Use the straight / slight right lanes.
37
Keep slight right at fork onto I 295
2.0 mi·2 min·Cross Bronx Expressway
Exit 6BToward I 295 South: Throgs Neck BridgeUse the straight / slight left lanes.
38
Merge onto I 295
0.6 mi·58 sec·Throgs Neck Expressway
39
Continue on I 295
2.0 mi·3 min·Throgs Neck Bridge
Use the straight / slight right lanes.
40
Continue on I 295
5.0 mi·5 min·Clearview Expressway
Use the straight / slight right lanes.
41
Continue on NY 24
0.7 mi·1 min·Hollis Court Boulevard
Use the straight lane.
42
At end of road, turn left onto NY 24
0.2 mi·35 sec·Jamaica Avenue
Use the left lane.
43
Turn right onto Hempstead Avenue
0.9 mi·2 min·Hempstead Avenue
44
Turn right onto 225th Street
228 ft·9 sec·225th Street
Use the right lane.
45
Take the ramp
0.2 mi·28 sec
Toward Cross Island Parkway South, Verrazano Bridge
46
Merge onto CI
1.3 mi·1 min·Cross Island Parkway
Use the straight / slight right lanes.
47
Take the exit
0.5 mi·1 min
Exit 25AToward Southern State Parkway East, Eastern Long IslandUse the slight left / straight lanes.
48
Merge onto SO
25 mi·31 min·Southern State Parkway
Use the straight / slight right lanes.
49
Keep slight left at fork onto SO
0.2 mi·16 sec·Southern State Parkway
Use the straight / slight right lanes.
50
Take the exit
0.2 mi·31 sec
Exit 41SToward Bay Shore Road South, Bay ShoreUse the slight right lane.
51
Turn straight onto CR 57
0.5 mi·1 min·Bay Shore Road
52
Continue on CR 57
0.3 mi·43 sec·Howells Road
53
Turn straight onto CR 57
341 ft·6 sec·Sunrise Highway
54
Keep slight right at fork onto CR 57
0.6 mi·1 min·Howells Road
Toward Howells Road SouthUse the right lane.
55
Continue on CR 57
0.2 mi·24 sec·Roosevelt Street
56
Continue on CR 57
0.7 mi·1 min·3rd Avenue
57
At end of road, turn left onto NY 27A
1.1 mi·1 min·East Main Street
58
Continue on Montauk Highway
0.2 mi·17 sec·Montauk Highway
59
Continue on NY 27A
0.8 mi·1 min·Main Street
60
Arrive at destination
NY 27A
Trip Plan
To make the most of this 6-hour and 38-minute drive, consider an early morning departure from Port Byron to avoid potential traffic, especially as you approach the Long Island area. With only one recommended stop and a longest stretch of 98.8 miles, you have flexibility in pacing. Plan your single stop strategically, perhaps around the halfway point or where you anticipate needing a break from the 'turn-heavy local drive' segments. Keep an eye on your fuel levels, as highway driving for 59% of the trip can consume fuel steadily, and the $51 estimated cost should be a good baseline.
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.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 154.3 miles from Port Byron, NY, or about 3h 22m into the drive.
The longest continuous stretch on this route runs about 98.8 miles.
This is a comfortable same-day trip.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 68 miles or 1h 40m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 154.3 miles or 3h 22m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 5h 20m
Traffic, exits, and arrival timing usually matter more near Islip, NY than in the middle of the route.
Before You Leave
+
Open the route before leaving Port Byron, 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.
Day 1
Settle into the route from Port Byron, NY
This is one driving day of about 308.5 miles and 6h 38m.
Your first comfortable stop window is around 68 miles from Port Byron, NY.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 1 real break rather than only quick fuel stops.
The longest stretch is on I 81 for about 98.8 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 154.3 mi from Port Byron, NY
· 3h 22m into the drive
Place data sourced from public business listings. Hours and availability may vary.
National Parks Near This Route
Worth a detour if your schedule allows.
Harriet Tubman National Historical Park
National Historical Park
Harriet Tubman was guided by a deep faith and devotion to family, freedom, and community. After emancipating herself and members of her family, she moved them from Ontario, Canada to Fleming and Aubur...
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...
5 mi from route
~13 min detour
Free
near mile 255.3
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...
5 mi from route
~13 min detour
Free
near mile 255.3
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...
9 mi from route
~23 min detour
Free
near mile 255.3
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...
11 mi from route
~27 min detour
Free
near mile 255.3
Located at the southern tip of Manhattan, Castle Clinton marks the place where New York City began and reflects the growth of both the city and the nation. Built to defend the harbor during the War of...
11 mi from route
~28 min detour
Free
near mile 255.3
Park data from the National Park Service API. Alerts update every 2 hours.
Fuel & Cost
Regular Gas
$50.78 one way
$101.56 round trip
$4.18/gal25.4 MPG avg108 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.52
$54.91
$109.82
premium
$4.92
$59.79
$119.59
diesel
$5.61
$68.11
$136.23
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
$51
Tolls
$23
Meals
$25–$50
Total
$98–$123
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 107.9 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $32 in charging
· 1 stop
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
92.6
1
$32.39
$14.81
Efficient EV
77.1
0
$26.99
$12.34
EV Truck/SUV
123.4
1
$43.19
$19.74
Gas CO2
108 kg
EV CO2
36 kg (67% 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 Apr 15, 2026
Origin
Port Byron, NY
Evening
in Port Byron on Friday
Local time
6:43 PM
EDT
Current temp
42°F
Unavailable
Live forecast
Destination
Islip, NY
Evening
in Islip on Friday
Local time
6:43 PM
EDT
Current temp
44°F
Unavailable
Live forecast
57°F
Ramapo, NY
154 mi in
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.
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
2 degrees warmer at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
6h 38m on the road
Start early — leave by 6-7 AM to arrive at a reasonable hour.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
Frequently Asked Questions
The drive from Port Byron, NY to Islip, NY covers 308.5 miles and takes about 6h 38m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are I 81, Keystone Shortway, Southern State Parkway. Expect a mix of highway and local road driving.
This is a comfortable same-day trip.
The midpoint is about 154.3 miles from Port Byron, NY. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $50.78 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
Start early — leave by 6-7 AM to arrive at a reasonable hour. This is a long drive — plan for a morning departure or consider splitting it into two days.
Plan about 1 meaningful break for fuel, food, or rest. Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
This is a demanding drive. With 35 significant decision points across 308.5 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.
The main spots that need attention: at 141.5 miles (US 6): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 256.1 miles: Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 256.3 miles: Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Between Port Byron, NY and Islip, NY, road signs point toward Mt Pocono, Milford, New York City, Leonia, Teaneck and George Washington Bridge Upper Level - among others.
Yes. Nearby national parks include Harriet Tubman National Historical Park, General Grant National Memorial and Hamilton Grange National Memorial. There are 6 parks within detour distance of this route.
How this page is built
Compiled by the Trip.ovh planning team at COD Solutions Oy from open government datasets — OSRM over OpenStreetMap for geometry, EIA for fuel prices, and NPS for national parks. See our methodology for refresh cadence and limitations.
