Harlem, FL to Key Biscayne, FL is 104.4 miles and takes about 2h 17m via US 27 and I-95, with a fuel budget near $17 and enough daylight to finish in a day. This drive stays within Florida, taking you from the northern part of the state down towards the Miami area. With over 70% of the route on highways, expect a relatively quick transit, making it ideal for a single-day trip. The short duration means you can focus on your destination rather than the travel itself.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Midpoint
52.2 miles from Harlem, FL
A natural place for your longest stop of the day
, about 1h 7m into the drive
.
Main Roads
Road
Distance
Duration
US 27
40.5 mi
48m
Sugarland Highway
14.7 mi
18m
I 95
11.4 mi
14m
Florida's Turnpike
10.4 mi
12m
Port Everglades Expressway
9 mi
10m
Rickenbacker Causeway
5.7 mi
10m
I 75
4.6 mi
4m
Francisco Street
1 mi
2m
Longest stretch:
US 27
— 40.5 mi, about 48m
Turn-by-Turn Driving Directions
Step-by-step road directions between Harlem, FL and Key Biscayne, FL.
1
Start on 10th Street
89 ft·8 sec·10th Street
2
Turn left onto Harlem Academy Avenue
0.4 mi·1 min·Harlem Academy Avenue
3
At end of road, turn left onto 7th Street
0.1 mi·21 sec·7th Street
4
Continue on Georgia Avenue
0.4 mi·1 min·Georgia Avenue
5
Turn left onto South WC Owen Avenue
140 ft·6 sec·South WC Owen Avenue
6
Turn right onto Sonora Avenue
0.8 mi·2 min·Sonora Avenue
7
Turn left onto Francisco Street
1.0 mi·2 min·Francisco Street
8
Turn right onto US 27; FL 80
15 mi·18 min·Sugarland Highway
9
Continue on US 27; FL 80
40 mi·48 min·US 27; FL 80
10
Continue on US 27
0.5 mi·33 sec·US 27
11
Take the exit
0.3 mi·31 sec
Toward I 75: Miami, Fort Lauderdale, NaplesUse the straight / right lanes.
12
Keep slight left at fork
0.8 mi·1 min
Toward I 75 South: Miami, Fort Lauderdale
13
Merge onto I 75
4.6 mi·4 min·I 75
14
Keep slight right at fork onto I 595
9.0 mi·10 min·Port Everglades Expressway
Exit 19Toward SR 869 Toll North, I 595 East: Coral Springs, Fort LauderdaleUse the straight / slight right lanes.
15
Take the exit
0.1 mi·18 sec
Exit 8; 9A-BToward US 441: Orlando, Miami, Florida's TurnpikeUse the slight right lane.
16
Turn straight onto SR 84
0.4 mi·37 sec·SR 84
Toward SR 84 East, I 595 East, US 441: Florida's Turnpike, North Orlando, South Miami
17
Take the ramp
0.4 mi·46 sec
Exit 8Toward Florida's Turnpike, Miami South, Orlando NorthUse the straight / right lanes.
18
Keep slight left at fork
0.4 mi·56 sec
Toward Miami, Florida's TurnpikeUse the straight / slight right lanes.
19
Keep slight left at fork
0.3 mi·33 sec
Toward Miami, Florida's Turnpike South
20
Merge onto Florida's Turnpike
10 mi·12 min·Florida's Turnpike
Use the straight / slight right lanes.
21
Take the exit
0.3 mi·42 sec
Toward I 95, US 441, SR 826 West
22
Keep slight left at fork
0.8 mi·1 min
Toward I 95, US 441
23
Keep slight left at fork
0.1 mi·18 sec
Toward I 95 SouthUse the straight / slight left lanes.
24
Merge onto I 95
11 mi·14 min·I 95
Use the straight / slight right lanes.
25
Take the exit
0.2 mi·26 sec
Exit 1AToward Rickenbacker Causeway, Key BiscayneUse the slight right lane.
26
Continue on Mary Brickell Road
423 ft·7 sec·Mary Brickell Road
Use the straight / left / right lanes.
27
Continue on Southwest 26th Road
507 ft·16 sec·Southwest 26th Road
28
Continue on Southeast 26th Road
403 ft·13 sec·Southeast 26th Road
Use the left / straight lanes.
29
Continue on Rickenbacker Causeway
5.7 mi·10 min·Rickenbacker Causeway
Use the left / straight lanes.
30
Continue on Crandon Boulevard
0.6 mi·1 min·Crandon Boulevard
Use the left lane.
31
Continue on Crandon Boulevard
339 ft·15 sec·Crandon Boulevard
32
Arrive at destination
Crandon Boulevard
Trip Plan
Given this is a relatively short, single-day drive of just over 2 hours, you have plenty of flexibility. Leaving in the morning will get you to Key Biscayne with ample time to explore. The fuel cost is estimated at $17, so ensure you have enough for the trip, especially since there are no planned stops. Pay attention to the transition from highway to surface roads, as this is where traffic can become more complex. Plan to have your destination details ready as you near the end of the drive.
Morning Departure
Leave by 9 AM and you'll arrive before lunch.
Evening Departure
Even a 4 PM departure gets you there before dark in summer.
You can normally do this drive in one day.
You may only need one short stretch break if traffic stays light.
The halfway point lands around 52.2 miles from Harlem, FL, or about 1h 7m into the drive.
The longest continuous stretch on this route runs about 40.5 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 23 miles or 31m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 52.2 miles or 1h 7m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 1h 48m
Traffic, exits, and arrival timing usually matter more near Key Biscayne, FL than in the middle of the route.
Before You Leave
+
Open the route before leaving Harlem, FL 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 Harlem, FL
This is one driving day of about 104.4 miles and 2h 17m.
Your first comfortable stop window is around 23 miles from Harlem, FL.
This route can stay practical as a one-day drive if traffic stays reasonable.
The longest stretch is on US 27 for about 40.5 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 23
5 decision points cluster between mile 58.1 and 97.6 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
7
58.1 mi into trip|~1h 14m in
Take the exit toward I 75: Miami, Fort Lauderdale, Naples
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / right lanes.
Toward I 75: Miami, Fort Lauderdale, Naples
9
63.8 mi into trip|~1h 21m in|I 595 / Port Everglades Expressway
Keep slight right at fork onto I 595 / Port Everglades Expressway toward SR 869 Toll North, I 595 East: Coral Springs, Fort Lauderdale
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Exit 19
Toward SR 869 Toll North, I 595 East: Coral Spr...
8
72.9 mi into trip|~1h 31m in
Take the exit toward US 441: Orlando, Miami, Florida's Turnpike
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 8; 9A-B
Toward US 441: Orlando, Miami, Florida's Turnpi...
8
73.8 mi into trip|~1h 33m in
Keep slight left at fork toward Miami, Florida's Turnpike
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Toward Miami, Florida's Turnpike
8
97.6 mi into trip|~2h 4m in
Take the exit toward Rickenbacker Causeway, Key Biscayne
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 1A
Toward Rickenbacker Causeway, Key Biscayne
Fuel & Cost
Regular Gas
$16.62 one way
$33.24 round trip
$4.04/gal25.4 MPG avg37 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.40
$18.08
$36.15
premium
$4.72
$19.41
$38.83
diesel
$5.61
$23.05
$46.10
Estimated Tolls: $0.73
Florida's Turnpike
(10.4 mi)$0.73
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
$17
Tolls
$1
Meals
$25–$50
Total
$42–$67
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 36.5 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $11 in charging
· 0 stops
· 68% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
31.3
0
$10.96
$5.01
Efficient EV
26.1
0
$9.14
$4.18
EV Truck/SUV
41.8
0
$14.62
$6.68
Gas CO2
37 kg
EV CO2
12 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 19, 2026
Origin
Harlem, FL
Morning
in Harlem on Tuesday
Local time
6:25 AM
EDT
Current temp
66°F
Partly Cloudy
SE 2 to 7 mph3% chanceLive forecast
Destination
Key Biscayne, FL
Morning
in Key Biscayne on Tuesday
Local time
6:25 AM
EDT
Current temp
79°F
Unavailable
Live 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.
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
13 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
2h 17m 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.
National Parks Near This Route
Worth a detour if your schedule allows.
Biscayne National Park
National Park
Within sight of Miami, yet worlds away, Biscayne protects a rare combination of aquamarine waters, emerald islands, and fish-bejeweled coral reefs. Evidence of 10,000 years of human history is here to...
14 mi from route
~36 min detour
Free
near mile 104.4
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
This drive features 73% highway, meaning you'll spend most of your time on faster roads. The longest continuous stretch on a single road is 40.5 miles on US 27. Expect a significant amount of highway driving before transitioning to surface roads as you approach your destination. The profile is mostly highway, so be prepared for typical highway conditions with varying traffic patterns and exit ramps.
73% highway — fuel and pacing are the main things to plan.
32 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 40.5 mi on US 27.
How Hard Is This Drive?
10/10
This is a straightforward highway drive that stays mostly on US 27 and Sugarland Highway. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 58.1 miles in.
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 23 significant decision points across 104.4 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 58.1 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 63.8 miles (I 595 / Port Everglades Expressway): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 72.9 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Harlem, FL and Key Biscayne, FL, road signs point toward Fort Lauderdale, Naples, Miami, Florida's Turnpike, Orlando and Miami South - among others.
Fort Lauderdale
58.1 mi in|~1h 14m
Naples
58.1 mi in|~1h 14m
Miami
72.9 mi in|~1h 31m
Florida's Turnpike
72.9 mi in|~1h 31m
Orlando
73 mi in|~1h 32m|via SR 84
Miami South
73.4 mi in|~1h 32m
Orlando North
73.4 mi in|~1h 32m
Florida's Turnpike South
74.2 mi in|~1h 34m
Rickenbacker Causeway
97.6 mi in|~2h 4m
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 2h 17m. Total distance: 104.4 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
2h 17m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (73%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 40.5 miles on US 27. The full list of main roads is in the Roads section above.
Expect about $0.73 in tolls one way, starting with Florida's Turnpike. 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 1 rest area or service plaza 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 Key Biscayne, FL 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. There are 1 rest area along the route for bathroom stops.
The main spots that need attention: at 58.1 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 63.8 miles (I 595 / Port Everglades Expressway): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 72.9 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
Yes — Biscayne National Park. 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 Key Biscayne, FL before heading back.
