How far is North Key Largo, FL from St. Petersburg, FL?
The driving distance from North Key Largo, FL to St. Petersburg, FL is about 299 miles (481.2 km), with a travel time of about 04h 40m by car.
- The straight-line flight distance is about 226.1 miles (363.9 km).
- For a round trip, plan for roughly 09h 20m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM EDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
Flight Distance
Driving Distance
Gas Cost Calculator
Leave and Arrive Planner
Pick a departure time to see your estimated arrival and same-day return window.
Drive time stays fixed at 04h 40m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
You are leaving earlier than the recommended window, which gives you extra margin for breaks and traffic.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
Census designated place
Route Weather Snapshot
Check the forecast at both ends before you head out.
Chance Showers And Thunderstorms
Partly Sunny then Slight Chance Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between North Key Largo and St. Petersburg.
Turn-by-Turn Driving Directions
Step-by-step road directions between North Key Largo and St. Petersburg.
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1
Start on the route
1.7 mi · 3 min
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2
Turn left onto Card Sound Road
16.5 mi · 23 min · Card Sound Road
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3
Take the ramp straight toward US 1 North: Miami
578 ft · 16 sec
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4
Merge slight left onto Dixie Highway
1 mi · 2 min · Dixie Highway
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5
Take the exit slight right toward Miami, Orlando, Florida's Turnpike North
1785 ft · 38 sec
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6
Continue on Homestead Extension of Florida's Turnpike
13.2 mi · 16 min · Homestead Extension of Florida's Turnpike
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7
Keep slight right to continue on Homestead Extension of Florida's Turnpike
3.6 mi · 5 min · Homestead Extension of Florida's Turnpike
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8
Keep slight left to continue on Homestead Extension of Florida's Turnpike
2.5 mi · 3 min · Homestead Extension of Florida's Turnpike
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9
Keep slight right to continue on Homestead Extension of Florida's Turnpike
15.5 mi · 18 min · Homestead Extension of Florida's Turnpike
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10
Take the exit slight right toward US 27: Okeechobee Road
1140 ft · 28 sec
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11
Keep slight right to continue on US 27: Okeechobee Road
633 ft · 16 sec
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12
Merge slight left onto Okeechobee Road
17.6 mi · 23 min · Okeechobee Road
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13
Take the exit slight right toward I 75: Miami, Fort Lauderdale, Naples
1360 ft · 33 sec
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14
Keep slight left to continue on I 75 North: Naples
1.3 km · 2 min
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15
Merge slight left onto Alligator Alley
203.5 mi · 3 hr 38 min · Alligator Alley
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16
Take the exit slight right toward I 275 North: Saint Petersburg
5.7 mi · 8 min
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17
Keep slight left
1610 ft · 20 sec
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18
Merge slight right onto Sunshine Skyway Bridge
14.3 mi · 17 min · Sunshine Skyway Bridge
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19
Take the exit slight left toward 31st Street South
1604 ft · 39 sec
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20
Keep slight left to continue on Winery, Treasure Island, Tropicana Field
49 m · 10 sec
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21
Turn left onto 31st Street South
2167 ft · 58 sec · 31st Street South
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22
Turn left onto 5th Avenue South
1303 ft · 40 sec · 5th Avenue South
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23
Turn right onto 34th Street South
1589 ft · 41 sec · 34th Street South
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24
Arrive at your destination
0 m · 1 sec · 34th Street South
Car Route Details
A richer read on the saved driving route between North Key Largo and St. Petersburg.
Interchange-aware route
The drive includes several ramps, exits, or merges, so checking the next few maneuvers before busy interchanges is useful.
Alligator Alley
Merge slight left onto Alligator Alley
203 mi · 03h 38m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Chance Showers And Thunderstorms leaving North Key Largo and Partly Sunny then Slight Chance Showers And Thunderstorms near St. Petersburg.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from North Key Largo to St. Petersburg?
The road trip is about 299 miles (481.2 km) and usually takes 04h 40m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
Golden Gate is a useful midpoint, sitting about 149.5 miles from North Key Largo and 149.5 miles from St. Petersburg.
How much longer is the road route than the straight-line distance?
The direct path is about 226.1 miles (363.9 km), while the road route adds roughly 72.9 extra miles because roads do not follow the straight air line.
When is the best time to leave for this route?
A good departure window is usually 6:00 AM to 8:00 AM EDT. If you want a more comfortable same-day return, try to leave by 7:40 AM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $43.76 one way or $87.52 round trip. Estimated CO2 is about 93.8 kg one way.
What should you check before leaving?
Before you leave, expect Chance Showers And Thunderstorms around North Key Largo and Partly Sunny then Slight Chance Showers And Thunderstorms near St. Petersburg.
Stop Ideas Near Golden Gate
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Golden Gate.
Fort Myers, Florida
Port Charlotte, Florida
Flight Path Map
This map shows the direct air route between North Key Largo and St. Petersburg. Straight-line distance: 226.12 mi (363.9 km).
#1 North Key Largo
Census-designated place in Monroe County, Florida, United States
| Population | 1,244 |
| Coordinates | 25.2673400, -80.3233900 |
| Altitude | 0 |
| Country | United States |
#2 St. Petersburg
The second most populous city in Florida.
| Population | 253,693 |
| Coordinates | 27.7708600, -82.6792700 |
| Altitude | 13 |
| Country | United States |
End: US 19 (-82.679372, 27.77086)
Estimated Travel Time
Distance: 481 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 09h 57m |
| 40 mph (64.37 km/h) | 07h 28m |
| 50 mph (80.47 km/h) | 05h 58m |
| 60 mph (96.56 km/h) | 04h 59m |
| 70 mph (112.65 km/h) | 04h 16m |
| 80 mph (129 km/h) | 03h 43m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.15 | $43.76 | $87.52 |
| Mid-grade | $4.60 | $48.49 | $96.98 |
| Premium | $4.90 | $51.65 | $103.31 |
| Diesel | $4.35 | $45.89 | $91.79 |
Assumes 8.3 L/100 km (about 28.3 MPG). CO2 is an estimate and varies by vehicle, fuel blend, traffic, and terrain.
Prices in Florida · May 13, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.