Origin
Islip, NY
Late night in Islip on Sunday
Local time
12:38 AM
EDT
Current temp
44°F
Unavailable
Compiled and reviewed by the US Trip Planner planning team at COD Solutions Oy · Last reviewed Apr 26, 2026 · Editorial standards
Drive Time
5h 7m
Distance
246.9 mi
397 km
Drive Score
8/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$40
one way
EV Charging
Unknown
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Islip, NY
Wikimedia Commons
Saint Johnsville, NY
Renan Tagliaferro
Islip, NY to Saint Johnsville, NY is 246.9 miles and takes about 5h 7m via NY 17, New York State Thruway, and Southern State Parkway, with a fuel budget near $40 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 a straightforward drive that mostly sticks to major roadways, making it a practical choice for a single-day trip. Plan for a relatively quick transit between Long Island and upstate New York.
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
123.5 miles from Islip, NY
A natural place for your longest stop of the day , about 2h 39m into the drive .
| Road | Distance | Duration |
|---|---|---|
| NY 17 | 117.5 mi | 2h 15m |
| New York State Thruway | 46.4 mi | 53m |
| Southern State Parkway | 24.7 mi | 31m |
| NJ 17 | 14.7 mi | 18m |
| NJ 4 | 6.7 mi | 9m |
| Cross Bronx Expressway | 6.6 mi | 8m |
| Clearview Expressway | 5 mi | 5m |
| River Road | 4.2 mi | 5m |
Hour-of-day weekday pattern from 13 FHWA count stations on your route.
Peak
7 AM
~4,026 veh/hr typical
Quietest
2 AM
~1,234 veh/hr
Peak-to-quiet ratio
3.3×
busier at peak than in the quiet hours
Averaged across 21 weeks of 2023 FHWA Travel Monitoring Analysis System data. Weekday hours only (Mon–Fri).
Step-by-step road directions between Islip, NY and Saint Johnsville, NY.
Start on NY 27A
Continue on Montauk Highway
Continue on NY 27A
Turn right onto 3rd Avenue
Continue on CR 57
Continue on CR 57
Turn straight onto Sunrise Highway
Keep slight right at fork onto CR 57
Continue on CR 57
Take the ramp
Continue on this road
Merge onto SO
Take the exit
Merge onto CI
Take the exit
Keep slight left at fork
Keep slight right at fork
Keep slight right at fork
Continue on this road
Keep slight left at fork
Turn right onto NY 24
Turn left onto Jamaica Avenue
Turn right onto NY 24
Continue on I 295
Continue on I 295
Continue on I 295
Keep slight left at fork onto I 295
Keep slight left at fork onto I 95; US 1
Continue on I 95; US 1
Continue on I 95 EXPR; US 1 EXPR; US 9 EXPR
Keep slight left at fork onto I 95 EXPR; US 1 EXPR; US 9 EXPR
Keep slight left at fork onto I 95 EXPR; NJTP
Take the exit
Keep slight right at fork
Merge onto NJ 4
Take the exit
Keep slight right at fork
Merge onto NJ 17
Continue on NJ 17
Continue on NJ 17
Continue on NJ 17
Continue on I 287; NY 17
Keep slight left at fork onto NY 17
Keep slight left at fork onto I 90
Take the exit
At end of road, turn right onto NY 5S
Continue on NY 5S
Continue on NY 5S
Continue on NY 5S
Turn left onto NY 5S; NY 80
Turn right onto NY 5S
Continue on NY 5S
Turn right onto CR 65
Turn right onto Bridge Street
Turn left onto Mohawk Street
Turn right onto East Liberty Street
At end of road, turn right onto South Division Street
Turn left onto West Liberty Street
Arrive at destination
Given the 5-hour duration, leaving Islip in the morning will allow you to reach Saint Johnsville by the afternoon. The 117.5-mile stretch on NY 17 is the longest continuous driving segment, so consider a stop for fuel or a break before or after this portion. With a fuel cost estimated around $40, it's a budget-friendly trip. Since this is a single-day drive, you have flexibility with your departure time, but an earlier start is generally recommended to avoid potential traffic, especially around the parkways and Thruway interchanges.
Morning Departure
An early start around 7-8 AM gets you there with plenty of daylight left.
Evening Departure
A late afternoon start means arriving after dark. Morning is better.
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 54 miles or 1h 16m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 123.5 miles or 2h 39m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 4h 10m
Traffic, exits, and arrival timing usually matter more near Saint Johnsville, NY than in the middle of the route.
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.
Day 1
Settle into the route from Islip, NY
This is one driving day of about 246.9 miles and 5h 7m.
Rest stops, refuel points, and overnight suggestions along this route.
Mid-route town
Meal stop
123 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.
A short stop after about 54 miles helps settle the day before fatigue starts building.
The midpoint is around 123.5 miles from Islip, NY, which is a good place for a longer meal and fuel stop.
Before the longest stretch
Fuel checkTop up before NY 17 if your tank is already low. That segment runs about 117.5 miles.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
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.
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
Keep slight left at fork toward NY 24 West: Hempstead Avenue
Highway fork - watch signs carefully. Lane positioning matters here
Keep slight right at fork toward Hempstead Avenue West
Highway fork - watch signs carefully. Lane positioning matters here
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
Keep slight right at fork toward NJ 4 West: Paramus
Highway fork - watch signs carefully. Lane positioning matters here
Regular Gas
$40.13 one way
$80.25 round trip
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.47 | $43.43 | $86.86 |
| premium | $4.87 | $47.30 | $94.60 |
| diesel | $5.40 | $52.52 | $105.04 |
Estimated Tolls: $24.87
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
$40
Tolls
$25
Meals
$25–$50
Total
$90–$115
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 86.4 kg one way. Prices: EIA weekly data, 2026-04-20.
Driving Electric?
About $26 in charging · 0 stops · 66% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 74.1 | 0 | $25.92 | $11.85 |
| Efficient EV | 61.7 | 0 | $21.60 | $9.88 |
| EV Truck/SUV | 98.8 | 1 | $34.57 | $15.80 |
Gas CO2
86 kg
EV CO2
29 kg (66% less)
Plan for 0 charging stops, roughly every 270 miles. Allow 25-40 minutes per stop at a DC fast charger.
DC fast charging avg $0.35/kWh. Home charging avg $0.16/kWh. US grid CO2: 0.39 kg/kWh.
Current conditions at both ends of the drive.
Origin
Late night in Islip on Sunday
Local time
12:38 AM
EDT
Current temp
44°F
Unavailable
Destination
Late night in Saint Johnsville on Sunday
Local time
12:38 AM
EDT
Current temp
40°F
Unavailable
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
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
Temperature spread
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
An early start around 7-8 AM gets you there with plenty of daylight left.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
This route features a high highway percentage, with 74% of the drive on major roads. You'll experience a significant stretch of 117.5 miles on NY 17, offering extended cruising. The transition from the parkway system to the Thruway and then onto state routes will present a mix of environments, from suburban access roads to more open highway travel before reaching your destination.
This is a straightforward highway drive that stays mostly on NY 17 and New York State Thruway. 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.
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 37 significant decision points across 246.9 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.
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Islip, NY and Saint Johnsville, NY, road signs point toward Cross Island Parkway North, Hempstead Avenue West, Grandstand, Upper Level, Njtp South: Hackensack and Gsp South - among others.
Cross Island Parkway North
Hempstead Avenue West
Grandstand
Upper Level
Njtp South: Hackensack
Gsp South
Gsp North
Newark
Mahwah
New York State Thruway North: Albany
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
Top landmarks
City content from Wikivoyage (CC BY-SA 4.0) and Wikidata (CC0).
Weekend Trip
Doable as a same-day drive at 5h 7m. Total distance: 246.9 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
5h 7m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (74%). Some complex stretches to watch for.
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, and FHWA TMAS for hourly traffic volumes. See our methodology for refresh cadence and limitations.
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