Distance between Key Largo FL and Marathon FL
The distance from Key Largo to Marathon is 50 miles by road. Road takes approximately 1 hour and 20 minutes and goes through Islamorada, Rock Harbor, Thompson, Sunset Point, Tavernier, Plantation and Matecumbe.
Shortest distance by air | 48 mi ✈️ |
Car route length | 49.7 mi 🚗 |
Driving time | 1 h 20 min |
Fuel amount | 1.7 gal |
Fuel cost | 5.7 USD |

Point | Distance | Time | Fuel | |
Key Largo | 0 mi | 00 min | 0.0 gal | |
US 1 4 mi, 05 min
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Thompson | 4 mi | 05 min | 0.1 gal | |
US 1 3 mi, 04 min
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Tavernier | 7 mi | 09 min | 0.2 gal | |
US 1 3 mi, 04 min
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Plantation | 11 mi | 14 min | 0.3 gal | |
US 1 7 mi, 14 min
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Matecumbe | 17 mi | 28 min | 0.6 gal | |
US 1 5 mi, 06 min
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Lower Matecumbe Beach | 23 mi | 34 min | 0.7 gal | |
US 1 8 mi, 14 min
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Layton | 31 mi | 49 min | 1.0 gal | |
US 1 5 mi, 06 min
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Conch Key | 37 mi | 55 min | 1.2 gal | |
US 1 14 mi, 24 min
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Marathon | 50 mi | 1 h 19 min | 1.3 gal |
Hotels of Marathon
Frequently Asked Questions
How much does it cost to drive from Key Largo to Marathon?
Fuel cost: 5.7 USD
This fuel cost is calculated as: (Route length 49.7 mi) / (Fuel consumption 29.4 mpg) * (Fuel price 3.37 USD / gal)
You can adjust fuel consumption and fuel price here.
How long is a car ride from Key Largo to Marathon?
Driving time: 1 h 20 min
This time is calculated for driving at the maximum permitted speed, taking into account traffic rules restrictions.
- 22 mi with a maximum speed 55 mph = 24 min
- 3 mi with a maximum speed 50 mph = 3 min
- 18 mi with a maximum speed 45 mph = 24 min
- 6 mi with a maximum speed 12 mph = 26 min
The calculated driving time does not take into account intermediate stops and traffic jams.
How far is Key Largo to Marathon by land?
The distance between Key Largo and Marathon is 49.7 mi by road.
Precise satellite coordinates of highways were used for this calculation. The start and finish points are the centers of Key Largo and Marathon respectively.
How far is Key Largo to Marathon by plane?
The shortest distance (air line, as the crow flies) between Key Largo and Marathon is 47.8 mi.
This distance is calculated using the Haversine formula as a great-circle distance between two points on the surface of a sphere. The start and finish points are the centers of Key Largo and Marathon respectively. Actual distance between airports may be different.
How many hours is Key Largo from Marathon by plane?
Boeing 737 airliner needs 5 min to cover the distance of 48 mi at a cruising speed of 497 mph.
Small plane "Cessna 172" needs 21 min to flight this distance at average speed of 136 mph.
This time is approximate and do not take into account takeoff and landing times, airport location and other real world factors.
How long is a helicopter ride from Key Largo to Marathon?
Fast helicopter "Eurocopter AS350" or "Hughes OH-6 Cayuse" need 19 min to cover the distance of 48 mi at a cruising speed of 149 mph.
Popular "Robinson R44" needs 22 min to flight this distance at average speed of 130 mph.
This time is approximate and do not take into account takeoff and landing times, aerodrome location and other real world factors.
What city is halfway between Key Largo and Marathon?
The halfway point between Key Largo and Marathon is Lower Matecumbe Beach. It is located about 2 mi from the exact midpoint by road.
The distance from Lower Matecumbe Beach to Key Largo is 23 mi and driving will take about 34 min. The road between Lower Matecumbe Beach and Marathon has length 27 mi and will take approximately 45 min.
The other cities located close to halfway point:
Where is Key Largo in relation to Marathon?
Key Largo is located 48 mi north-east of Marathon.
Key Largo has geographic coordinates: latitude 25.08704, longitude -80.44724.
Marathon has geographic coordinates: latitude 24.71375, longitude -81.09035.
Which highway goes from Key Largo to Marathon?
The route from Key Largo to Marathon follows US 1.