How far is St. Petersburg, FL from Marathon, FL?
The driving distance from St. Petersburg, FL to Marathon, FL is about 357.2 miles (574.9 km), with a travel time of about 07h 11m by car.
- The straight-line flight distance is about 233 miles (375 km).
- For a round trip, plan for roughly 14h 23m 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 07h 11m.
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.
City in Collier County, Florida, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Partly Sunny then Slight Chance Showers And Thunderstorms
Slight Chance Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between St. Petersburg and Marathon.
Turn-by-Turn Driving Directions
Step-by-step road directions between St. Petersburg and Marathon.
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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
-
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
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18
Merge slight left onto Dixie Highway
19.2 mi · 27 min · Dixie Highway
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19
Continue on Overseas Highway
59.1 mi · 1 hr 32 min · Overseas Highway
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20
Turn right onto 39th Street Gulf
546 ft · 30 sec · 39th Street Gulf
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21
Turn left onto Louisa Street
121 m · 17 sec · Louisa Street
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22
Arrive at your destination
0 m · 1 sec · Louisa Street
Car Route Details
A richer read on the saved driving route between St. Petersburg and Marathon.
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 Sunny then Slight Chance Showers And Thunderstorms leaving St. Petersburg and Slight Chance Showers And Thunderstorms near Marathon.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from St. Petersburg to Marathon?
The road trip is about 357.2 miles (574.9 km) and usually takes 07h 11m 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?
Immokalee is a useful midpoint, sitting about 178.8 miles from St. Petersburg and 178.5 miles from Marathon.
How much longer is the road route than the straight-line distance?
The direct path is about 233 miles (375 km), while the road route adds roughly 124.2 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 $52.31 one way or $104.61 round trip. Estimated CO2 is about 112.1 kg one way.
What should you check before leaving?
Before you leave, expect Partly Sunny then Slight Chance Showers And Thunderstorms around St. Petersburg and Slight Chance Showers And Thunderstorms near Marathon.
Stop Ideas Near Immokalee
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 Immokalee.
Fort Myers, Florida
Port Charlotte, Florida
Okeechobee
Flight Path Map
This map shows the direct air route between St. Petersburg and Marathon. Straight-line distance: 233.04 mi (375.04 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 Marathon
City in Monroe County, Florida, United States of America
| Population | 8,984 |
| Coordinates | 24.7137500, -81.0903500 |
| Altitude | 1 |
| Country | United States |
End: Marathon (-81.09035, 24.71375)
Estimated Travel Time
Distance: 575 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 11h 54m |
| 40 mph (64.37 km/h) | 08h 55m |
| 50 mph (80.47 km/h) | 07h 08m |
| 60 mph (96.56 km/h) | 05h 57m |
| 70 mph (112.65 km/h) | 05h 06m |
| 80 mph (129 km/h) | 04h 27m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.15 | $52.31 | $104.61 |
| Mid-grade | $4.60 | $57.96 | $115.91 |
| Premium | $4.90 | $61.74 | $123.48 |
| Diesel | $4.35 | $54.85 | $109.71 |
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.