Saint Augustine, FL to Harlem, FL is 272.7 miles and takes about 5h 27m via I 95 and FL 78, with a fuel budget near $43 and enough daylight to finish in a day. This trip stays within Florida, moving from the northeast part of the state down towards the interior. The majority of your travel will be on major highways, making it a straightforward drive. It's a single-day trip, so you can leave in the morning and arrive by late afternoon. Consider this route if you're looking for an efficient way to cover ground within Florida without extensive planning.
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
136.3 miles from Saint Augustine, FL
A natural place for your longest stop of the day
, about 2h 34m into the drive
.
Main Roads
Road
Distance
Duration
I 95
168.3 mi
3h 1m
FL 78
34.4 mi
46m
Okeechobee Road
27.7 mi
34m
US 27
15.9 mi
20m
South Ponce de Leon Boulevard
15.4 mi
21m
FL 70
3.4 mi
6m
Parrott Avenue
2.9 mi
5m
Lewis Boulevard
1.1 mi
2m
Longest stretch:
I 95
— 168.3 mi, about 3h 1m
Turn-by-Turn Driving Directions
Step-by-step road directions between Saint Augustine, FL and Harlem, FL.
1
Start on Cordova Street
84 ft·8 sec·Cordova Street
2
Turn left onto Carrera Street
0.4 mi·1 min·Carrera Street
3
At end of road, turn left onto US 1
1.0 mi·2 min·North Ponce de Leon Boulevard
4
Keep slight left at fork onto US 1
15 mi·21 min·South Ponce de Leon Boulevard
5
Take the ramp
0.3 mi·42 sec
Toward I 95 South: Miami
6
Merge onto I 95
168 mi·3 hr 1 min·I 95
Use the straight / slight right lanes.
7
Take the exit
0.5 mi·58 sec
Exit 129Toward FL 70: Okeechobee, Fort PierceUse the straight / slight right lanes.
8
Keep slight right at fork
492 ft·12 sec
Toward FL 70 West: OkeechobeeUse the right lane.
9
Merge onto FL 70
28 mi·34 min·Okeechobee Road
Use the left / uturn lanes.
10
Keep slight right at fork onto FL 70
3.4 mi·6 min·FL 70
11
Turn left onto Southeast 6th Avenue
0.3 mi·39 sec·Southeast 6th Avenue
12
At end of road, turn right onto Southeast 4th Street
0.3 mi·49 sec·Southeast 4th Street
13
Turn left onto US 98; US 441
2.9 mi·5 min·Parrott Avenue
Use the left lane.
14
Turn right onto FL 78
4.4 mi·6 min·FL 78
Use the left lane.
15
Continue on FL 78
30 mi·39 min·FL 78
16
Turn right onto US 27; FL 78
0.3 mi·23 sec·US 27; FL 78
17
Continue on US 27; FL 78
0.4 mi·35 sec·US 27; FL 78
18
Merge onto US 27; FL 78
0.2 mi·18 sec·US 27; FL 78
19
Turn slight right
338 ft·4 sec
20
Continue on US 27
15 mi·19 min·US 27
21
Turn right onto Lewis Boulevard
1.1 mi·2 min·Lewis Boulevard
Use the right lane.
22
Turn right onto 13th Street
0.1 mi·22 sec·13th Street
23
Turn left onto Harlem Academy Avenue
0.5 mi·1 min·Harlem Academy Avenue
24
Turn left onto 10th Street
89 ft·3 sec·10th Street
25
Arrive at destination
10th Street
Trip Plan
To make the most of this 5h 27m drive, aim for an early morning departure from Saint Augustine. This allows you to complete the 272.7 miles well before sunset, even with a brief stop. With a fuel cost estimated around $43, it's an economical trip. The longest stretch without a significant change in road type is 168.3 miles on I 95, so plan your fuel and rest stops accordingly before you get too far into that segment. Given it's a single-day route, you have flexibility, but breaking it up with a stop around the halfway point on I 95 can make the drive more comfortable.
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.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 136.3 miles from Saint Augustine, FL, or about 2h 34m into the drive.
The longest continuous stretch on this route runs about 168.3 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 60 miles or 1h 12m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 136.3 miles or 2h 34m 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 20m
Traffic, exits, and arrival timing usually matter more near Harlem, FL than in the middle of the route.
Before You Leave
+
Open the route before leaving Saint Augustine, 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 Saint Augustine, FL
This is one driving day of about 272.7 miles and 5h 27m.
Your first comfortable stop window is around 60 miles from Saint Augustine, FL.
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 95 for about 168.3 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 19
5 decision points cluster between mile 17.1 and 271 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
5
17.1 mi into trip|~26m in|I 95
Merge onto I 95
Merge point - match speed before joining. Lane positioning matters here
Use the straight / slight right lanes.
8
185.5 mi into trip|~3h 27m in
Take the exit toward FL 70: Okeechobee, Fort Pierce
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.
Exit 129
Toward FL 70: Okeechobee, Fort Pierce
7
185.9 mi into trip|~3h 28m in
Keep slight right at fork toward FL 70 West: Okeechobee
Highway fork - watch signs carefully. Lane positioning matters here
Use the right lane.
Toward FL 70 West: Okeechobee
5
186 mi into trip|~3h 28m in|FL 70 / Okeechobee Road
Merge onto FL 70 / Okeechobee Road
Merge point - match speed before joining. Lane positioning matters here
Use the left / uturn lanes.
6
271 mi into trip|~5h 23m in|Lewis Boulevard
Turn right onto Lewis Boulevard
Lane positioning matters here
Use the right lane.
Fuel & Cost
Regular Gas
$43.41 one way
$86.81 round trip
$4.04/gal25.4 MPG avg95 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.40
$47.22
$94.44
premium
$4.72
$50.71
$101.41
diesel
$5.61
$60.21
$120.42
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$43
Meals
$25–$50
Total
$68–$93
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 95.4 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $29 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
81.8
1
$28.63
$13.09
Efficient EV
68.2
0
$23.86
$10.91
EV Truck/SUV
109.1
1
$38.18
$17.45
Gas CO2
95 kg
EV CO2
32 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 Apr 20, 2026
Origin
Saint Augustine, FL
Morning
in Saint Augustine on Tuesday
Local time
6:49 AM
EDT
Current temp
86°F
Unavailable
Live forecast
Destination
Harlem, FL
Morning
in Harlem on Tuesday
Local time
6:49 AM
EDT
Current temp
88°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
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
5h 27m on the road
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.
National Parks Near This Route
Worth a detour if your schedule allows.
Castillo de San Marcos National Monument
National Monument
Built by the Spanish in St. Augustine to defend Florida and the Atlantic trade route, Castillo de San Marcos National Monument preserves the oldest masonry fortification in the continental United Stat...
Fort Matanzas National Monument preserves the fortified coquina watchtower, completed in 1742, which defended the southern approach to the Spanish military settlement of St. Augustine. It also protect...
5 mi from route
~14 min detour
Free
near mile 18.8
Discover a dynamic barrier island shaped by dunes, coastal hammocks, and Mosquito Lagoon. Walk among ancient Timucua shell mounds and connect with thousands of years of human history. Immerse yourself...
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
You'll spend about 81% of this 272.7-mile drive on highways, primarily I 95. The longest continuous stretch on a major highway is 168.3 miles on I 95. Eventually, you'll transition to surface roads like FL 78 and Okeechobee Road. Expect a significant amount of highway cruising before you reach the more rural sections of the route.
81% highway — fuel and pacing are the main things to plan.
25 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 168.3 mi on I 95.
How Hard Is This Drive?
8/10
This is a straightforward highway drive that stays mostly on I 95 and FL 78. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 17.1 miles in near I 95.
Driving Effort8/10
Demanding - plan breaks and stay ahead of the key maneuvers
Balances navigation complexity with total wheel time.
This is a demanding drive. With 19 significant decision points across 272.7 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 17.1 miles (I 95): Merge point - match speed before joining. Lane positioning matters here; at 185.5 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 185.9 miles: Highway fork - watch signs carefully. Lane positioning matters here.
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
On the drive from Saint Augustine, FL to Harlem, FL, road signs begin pointing toward Fort Pierce along the way.
St. Augustine lays claim to being the oldest city in the United States. It is 30 minutes south of Jacksonville in the First Coast, and is full of romantic ambiance and old world charm. It is best known for its remarkable historic streets and attractions, Spanish-style architecture, and panoramic bayfront views.
The walkable downtown is made up of narrow colonial streets lined with interesting locally-owned shops and outstanding restaurants. A trio of grand hotel buildings built in the late 19th century by railroad magnate Henry Flagler tower over the smaller, reconstructed historic houses, but the tallest building in town is just seven stories. One of Flagler's former hotels is now home to a small, private liberal arts college whose students add a sense of pulsating life to the centuries-old town.
In St.
Doable as a same-day drive at 5h 27m. Total distance: 272.7 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
5h 27m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (81%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 168.3 miles on I 95. The full list of main roads is in the Roads section above.
We did not find dedicated rest areas on this route. For a drive this long, plan bathroom and stretch breaks around gas stations, fast-food stops, or small-town downtowns — check the Nearby Places section for options.
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 Harlem, 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. Plan at least 1 meaningful breaks. Dedicated rest areas are limited, so plan gas or food stops as your bathroom breaks.
The main spots that need attention: at 17.1 miles (I 95): Merge point - match speed before joining. Lane positioning matters here; at 185.5 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 185.9 miles: Highway fork - watch signs carefully. Lane positioning matters here.
Yes — Castillo de San Marcos National Monument, Fort Matanzas National Monument and Canaveral National Seashore. See the National Parks section for detour distances and tips on detours.
Not recommended in a single day. At 5.5 hours each way, a round trip means 10.9 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Harlem, FL before the return drive.
