How far is St. Petersburg, FL from Big Coppitt Key, FL?
The driving distance from St. Petersburg, FL to Big Coppitt Key, FL is about 396.1 miles (637.4 km), with a travel time of about 08h 12m by car.
- The straight-line flight distance is about 228.2 miles (367.3 km).
- For a round trip, plan for roughly 16h 24m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 7:30 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 08h 12m.
Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
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.
A city in Broward County, Florida.
Route Weather Snapshot
Check the forecast at both ends before you head out.
Partly Cloudy
Mostly Clear
Driving Route Map
The map below follows the saved road route between St. Petersburg and Big Coppitt Key.
Turn-by-Turn Driving Directions
Step-by-step road directions between St. Petersburg and Big Coppitt Key.
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1
Start on 34th Street South
15 m · 5 sec · 34th Street South
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2
Turn right onto Central Avenue
1304 ft · 51 sec · Central Avenue
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3
Turn right onto 31st Street South
1.1 km · 1 min · 31st Street South
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4
Take the ramp slight right
2760 ft · 1 min
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5
Merge slight right
4.9 mi · 6 min
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6
Keep slight left
1406 ft · 17 sec
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7
Merge slight right onto Sunshine Skyway Bridge
13.4 mi · 15 min · Sunshine Skyway Bridge
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8
Keep slight left to continue on I 75 South: Naples
1.1 mi · 2 min
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9
Merge slight left
28 mi · 30 min
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10
Keep slight left
175.7 mi · 3 hr 8 min
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11
Take the exit slight right toward US 27: Miami, South Bay
1118 ft · 21 sec
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12
Keep slight right to continue on US 27 South: Miami
2407 ft · 59 sec
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13
Merge slight left
9.2 mi · 11 min
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14
Keep slight right
8.6 mi · 11 min
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15
Take the exit right toward Florida's Turnpike South: Homestead, Key West
1324 ft · 32 sec
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16
Merge slight left onto Homestead Extension of Florida's Turnpike
34.5 mi · 41 min · Homestead Extension of Florida's Turnpike
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17
Keep slight left
2930 ft · 1 min
-
18
Merge slight left onto Dixie Highway
19.2 mi · 27 min · Dixie Highway
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19
Continue on Overseas Highway
97.9 mi · 2 hr 33 min · Overseas Highway
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20
Turn right onto 1st Street
79 m · 17 sec · 1st Street
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21
Turn left onto Avenue F
66 m · 10 sec · Avenue F
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22
Arrive at your destination
0 m · 1 sec · Avenue F
Car Route Details
A richer read on the saved driving route between St. Petersburg and Big Coppitt Key.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
I 75 South
Keep slight left
176 mi · 03h 08m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
Better with a longer stop
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
Partly Cloudy leaving St. Petersburg and Mostly Clear near Big Coppitt Key.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from St. Petersburg to Big Coppitt Key?
The road trip is about 396.1 miles (637.4 km) and usually takes 08h 12m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
What is the halfway point on this route?
Weston is a useful midpoint, sitting about 198.2 miles from St. Petersburg and 197.8 miles from Big Coppitt Key.
How much longer is the road route than the straight-line distance?
The direct path is about 228.2 miles (367.3 km), while the road route adds roughly 167.9 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 7:30 AM EDT. Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $57.95 one way or $115.90 round trip. Estimated CO2 is about 124.2 kg one way.
What should you check before leaving?
Before you leave, expect Partly Cloudy around St. Petersburg and Mostly Clear near Big Coppitt Key.
Stop Ideas Near Weston
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 Weston.
Fort Lauderdale
Hollywood
Miami Intermodal Center
Deerfield Beach
Flight Path Map
This map shows the direct air route between St. Petersburg and Big Coppitt Key. Straight-line distance: 228.24 mi (367.32 km).
#1 St. Petersburg
The second most populous city in Florida.
| Population | 253,693 |
| Coordinates | 27.7708600, -82.6792700 |
| Altitude | 13 |
| Country | United States |
#2 Big Coppitt Key
Census designated place
| Population | 2,458 |
| Coordinates | 24.5965300, -81.6600900 |
| Altitude | 1 |
| Country | United States |
End: Big Coppitt Key (-81.66009, 24.59653)
Estimated Travel Time
Distance: 637 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 13h 11m |
| 40 mph (64.37 km/h) | 09h 54m |
| 50 mph (80.47 km/h) | 07h 55m |
| 60 mph (96.56 km/h) | 06h 36m |
| 70 mph (112.65 km/h) | 05h 39m |
| 80 mph (129 km/h) | 04h 56m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.15 | $57.95 | $115.90 |
| Mid-grade | $4.60 | $64.21 | $128.41 |
| Premium | $4.90 | $68.40 | $136.79 |
| Diesel | $4.35 | $60.77 | $121.54 |
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 07, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.