Montour Falls to Islip is 298.7 miles and takes about 6h 10m via Keystone Shortway and Southern Tier Expressway, with a fuel budget near $49 and enough daylight to finish in a day. This drive stays within New York, transitioning from the Northeast's Finger Lakes region to the more populated Long Island area. It's a straightforward, highway-focused trip, making it a solid choice for a single-day journey if you're looking for efficiency. You can expect a mostly uninterrupted drive, so pack your favorite podcasts or audiobooks. Consider this route if you need to get from point A to point B without many detours.
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
149.4 miles from Montour Falls, NY
A natural place for your longest stop of the day
, about 2h 59m 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 10m. Total distance: 298.7 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
6h 10m drive, plan rest stops for pacing.
Drive Character
This drive is predominantly highway-focused, with 62% of the journey on major expressways. You'll spend a significant portion of your time on the Keystone Shortway and the Southern Tier Expressway, which are designed for steady, higher speeds. The longest uninterrupted stretch you'll encounter is an impressive 80 miles along the Keystone Shortway, allowing for long periods of consistent driving. While the profile is highway-centric, be prepared for the transition onto I-81, which can sometimes bring more varied traffic conditions. Overall, it's a route built for covering ground efficiently.
Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 51 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
Keystone Shortway is the longest continuous segment at about 80 miles.
How Hard Is This Drive?
This is a straightforward highway drive that stays mostly on Keystone Shortway and Southern Tier Expressway. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 131.7 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 30 significant decision points across 298.7 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 131.7 miles (US 6): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 246.3 miles: Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 246.5 miles: Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Critical Maneuvers
5 of 30 key points
These are the spots where you need to pay the most attention. Preview them before you drive.
9
131.7 mi into trip|~2h 39m 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
246.3 mi into trip|~4h 55m 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
246.5 mi into trip|~4h 56m 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
256 mi into trip|~5h 10m 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
294.1 mi into trip|~6h 2m 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 Montour Falls, 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
131.7 mi in|~2h 39m|via US 6
Milford
132.5 mi in|~2h 40m|via I 84; I 380
New York City
246.3 mi in|~4h 55m
Leonia
246.5 mi in|~4h 56m
Teaneck
246.5 mi in|~4h 56m
George Washington Bridge Upper Level
248.8 mi in|~5h
Cross Island Parkway South
267.4 mi in|~5h 26m
Southern State Parkway East
268.9 mi in|~5h 29m
Eastern Long Island
268.9 mi in|~5h 29m
Main Roads
Road
Distance
Duration
Keystone Shortway
80 mi
1h 37m
Southern Tier Expressway
63.8 mi
1h 15m
I 81
53.4 mi
1h 3m
Southern State Parkway
24.7 mi
31m
I 380
23.6 mi
25m
Cross Bronx Expressway
6.6 mi
8m
Watkins Road
6.4 mi
8m
Christopher Columbus Highway
5.5 mi
5m
Longest stretch:
Keystone Shortway
— 80 mi, about 1h 37m
Turn-by-Turn Driving Directions
Step-by-step road directions between Montour Falls, NY and Islip, NY.
1
Start on NY 14
5.2 mi·5 min·North Catherine Street
2
Continue on NY 14
1.5 mi·3 min·Main Street
3
Continue on NY 14
6.4 mi·8 min·Watkins Road
4
Continue on North Main Street
1.3 mi·2 min·North Main Street
5
Take the ramp onto NY 13
0.2 mi·28 sec·NY 13
6
Merge onto I 86; NY 17; NY 13
64 mi·1 hr 15 min·Southern Tier Expressway
7
Keep slight right at fork onto I 81
53 mi·1 hr 3 min·I 81
Toward I 81 South: ScrantonUse the straight lane.
8
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.
9
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.
10
Keep slight right at fork onto I 380
24 mi·25 min·I 380
Exit 4Toward I 380 South: Mount Pocono
11
Keep slight left at fork
1.0 mi·1 min
Exit 1BToward I 80 East: Stroudsburg
12
Merge onto I 80
80 mi·1 hr 37 min·Keystone Shortway
Use the straight / right lanes.
13
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.
14
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.
15
Keep slight right at fork
0.4 mi·38 sec
Exit 70A-BToward Leonia, TeaneckUse the slight right lane.
16
Turn right
0.2 mi·35 sec
Exit 70AToward LeoniaUse the straight / slight right lanes.
17
Turn straight onto CR 56
454 ft·9 sec·Degraw Avenue
18
Continue on CR 56
1.1 mi·2 min·Fort Lee Road
Use the straight / right lanes.
19
Continue on CR 56
469 ft·13 sec·Main Street
20
Take the ramp
472 ft·12 sec
Toward George Washington Bridge
21
Merge onto US 1; US 9; US 46
0.3 mi·28 sec·Bergen Boulevard
Use the straight / slight right lanes.
22
Take the exit
312 ft·4 sec
Toward George Washington Bridge Upper Level
23
Merge onto I 95 EXPR
0.3 mi·20 sec·I 95 EXPR
Use the straight / slight right lanes.
24
Keep slight left at fork onto I 95 EXPR
0.8 mi·1 min·I 95 EXPR
25
Continue on I 95; US 1; US 9
0.6 mi·1 min·George Washington Bridge (upper level)
Use the straight / slight right lanes.
26
Continue on I 95; US 1
0.7 mi·1 min·Trans-Manhattan Expressway
27
Continue on I 95; US 1
4.7 mi·6 min·Cross Bronx Expressway
Use the straight / slight right lanes.
28
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.
29
Merge onto I 295
0.6 mi·58 sec·Throgs Neck Expressway
30
Continue on I 295
2.0 mi·3 min·Throgs Neck Bridge
Use the straight / slight right lanes.
31
Continue on I 295
5.0 mi·5 min·Clearview Expressway
Use the straight / slight right lanes.
32
Continue on NY 24
0.7 mi·1 min·Hollis Court Boulevard
Use the straight lane.
33
At end of road, turn left onto NY 24
0.2 mi·35 sec·Jamaica Avenue
Use the left lane.
34
Turn right onto Hempstead Avenue
0.9 mi·2 min·Hempstead Avenue
35
Turn right onto 225th Street
228 ft·9 sec·225th Street
Use the right lane.
36
Take the ramp
0.2 mi·28 sec
Toward Cross Island Parkway South, Verrazano Bridge
37
Merge onto CI
1.3 mi·1 min·Cross Island Parkway
Use the straight / slight right lanes.
38
Take the exit
0.5 mi·1 min
Exit 25AToward Southern State Parkway East, Eastern Long IslandUse the slight left / straight lanes.
39
Merge onto SO
25 mi·31 min·Southern State Parkway
Use the straight / slight right lanes.
40
Keep slight left at fork onto SO
0.2 mi·16 sec·Southern State Parkway
Use the straight / slight right lanes.
41
Take the exit
0.2 mi·31 sec
Exit 41SToward Bay Shore Road South, Bay ShoreUse the slight right lane.
42
Turn straight onto CR 57
0.5 mi·1 min·Bay Shore Road
43
Continue on CR 57
0.3 mi·43 sec·Howells Road
44
Turn straight onto CR 57
341 ft·6 sec·Sunrise Highway
45
Keep slight right at fork onto CR 57
0.6 mi·1 min·Howells Road
Toward Howells Road SouthUse the right lane.
46
Continue on CR 57
0.2 mi·24 sec·Roosevelt Street
47
Continue on CR 57
0.7 mi·1 min·3rd Avenue
48
At end of road, turn left onto NY 27A
1.1 mi·1 min·East Main Street
49
Continue on Montauk Highway
0.2 mi·17 sec·Montauk Highway
50
Continue on NY 27A
0.8 mi·1 min·Main Street
51
Arrive at destination
NY 27A
Trip Plan
Given the 6h 10m estimated duration and 298.7-mile distance, this trip is comfortably achievable in one day. Aim to depart Montour Falls in the morning to take advantage of daylight and avoid potential rush hour traffic as you approach Islip. With only one recommended stop, you can choose a convenient point along the Southern Tier Expressway or I-81 for a quick break. Keep an eye on your fuel gauge, as the longest stretch without services is 80 miles. The $49 fuel cost is a good estimate, but it's always wise to have a little extra buffer for fluctuating prices.
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 149.4 miles from Montour Falls, NY, or about 2h 59m into the drive.
The longest continuous stretch on this route runs about 80 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 66 miles or 1h 21m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 149.4 miles or 2h 59m 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 54m
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 Montour Falls, 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 Montour Falls, NY
This is one driving day of about 298.7 miles and 6h 10m.
Your first comfortable stop window is around 66 miles from Montour Falls, 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 Keystone Shortway for about 80 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 149.4 mi from Montour Falls, NY
· 2h 59m into the drive
The midpoint is around 150.6 miles from Montour Falls, NY, which is a good place for a longer meal and fuel stop.
Arriving in Islip, NY
The final approach into Islip, NY usually feels slower than the middle of the drive, so avoid planning your tightest schedule at the very end.
Try to arrive with enough fuel left to skip an immediate station stop unless you already know the area around Islip, NY.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
National Parks Near This Route
Worth a detour if your schedule allows.
General Grant National Memorial
National Memorial
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...
4 mi from route
~10 min detour
Free
near mile 247.2
Caution: Lower Crypt Access Subject to Safe Conditions
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...
4 mi from route
~11 min detour
Free
near mile 247.2
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 247.2
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
~26 min detour
Free
near mile 247.2
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 247.2
Here at Federal Hall, George Washington took the oath of office as the first President of the United States, marking the beginning of the American constitutional republic. This historic site served as...
11 mi from route
~28 min detour
Free
near mile 247.2
Park data from the National Park Service API. Alerts update every 2 hours.
Fuel & Cost
Regular Gas
$49.17 one way
$98.34 round trip
$4.18/gal25.4 MPG avg105 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.52
$53.17
$106.33
premium
$4.92
$57.89
$115.79
diesel
$5.61
$65.95
$131.90
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
$49
Tolls
$23
Meals
$25–$50
Total
$97–$122
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 104.5 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $31 in charging
· 1 stop
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
89.6
1
$31.36
$14.34
Efficient EV
74.7
0
$26.14
$11.95
EV Truck/SUV
119.5
1
$41.82
$19.12
Gas CO2
105 kg
EV CO2
35 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 18, 2026
Origin
Montour Falls, NY
Morning
in Montour Falls on Saturday
Local time
8:26 AM
EDT
Current temp
41°F
Unavailable
Live forecast
Destination
Islip, NY
Morning
in Islip on Saturday
Local time
8:26 AM
EDT
Current temp
50°F
Partly Cloudy
NE 3 mph0% chanceLive forecast
57°F
Ramapo, NY
149 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
9 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 10m 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 Montour Falls, NY to Islip, NY covers 298.7 miles and takes about 6h 10m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are Keystone Shortway, Southern Tier Expressway, I 81. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 149.4 miles from Montour Falls, NY. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $49.17 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 30 significant decision points across 298.7 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 131.7 miles (US 6): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 246.3 miles: Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 246.5 miles: Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Between Montour Falls, NY and Islip, NY, road signs point toward Mt Pocono, Milford, New York City, Leonia, Teaneck and George Washington Bridge Upper Level - among others.
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.
