Marathon to Key West is about 47–50 road miles and usually takes 1 to 1.5 hours on US-1.
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For Distance from Marathon, FL to Key West, FL, plan on roughly 47 to 50 road miles, depending on your exact start in Marathon and your stop in Key West. The drive is short on paper, but US-1 is a two-lane island highway for long stretches, so traffic, bridge work, weekend arrivals, and photo stops can stretch the clock.
The simple answer is this: drive if you want control, take the Lower Keys Shuttle if price matters most, and use a private transfer if you do not want to park in Key West. The route runs southwest on the Overseas Highway, crosses the Seven Mile Bridge soon after Marathon, passes Bahia Honda and Big Pine Key, and ends in compact Key West.
For buses, shuttles, and transfers between the two cities, compare route options here:
Marathon To Key West Drive: Miles, Time, And Route
The Marathon to Key West drive is a straight US-1 run of about 47 to 50 miles, with no faster inland route or bypass. The mile-marker system makes the distance easy to understand because the road counts down toward Key West.
The official Florida Keys tourism site says Overseas Highway mile markers run down to zero in Key West and lists Marathon around MM 63–40, while Key West sits around MM 4–0 on the official Florida Keys mile-marker page. From central Marathon near MM 50 to Old Town Key West near MM 0, the math lands right around 50 road miles.
The distance feels longer than a mainland 50-mile drive because passing zones are limited and sightseeing stops sit directly off the highway. Seven Mile Bridge is the signature stretch, but the drive also threads small Lower Keys communities where speed limits drop.
How Long Does The Marathon To Key West Drive Take?
The Marathon to Key West drive usually takes about 1 hour in light traffic and 1.5 hours when US-1 backs up. Add more time if you stop at Bahia Honda State Park, the National Key Deer Refuge area, or lunch on Big Pine Key.
Morning drives toward Key West tend to feel easier than late-afternoon returns after beach time and sunset plans. Holiday weekends, Fantasy Fest season, winter high season, and road work can add slow pockets with little warning.
Key West parking is the part many travelers underestimate. A car is useful for the drive, but the island itself is walkable once you reach Old Town, so paying to park and then leaving the car alone often makes more sense than moving it all day.
| Travel Option | Typical Time | Rough Cost |
|---|---|---|
| Personal car on US-1 | 1 to 1.5 hours | Fuel plus Key West parking |
| Rental car | 1 to 1.5 hours | Daily rental, fuel, parking, possible drop fee |
| Lower Keys Shuttle | Usually around 2 hours with stops | Key West Transit lists the full Keys one-way fare at $4 |
| Private transfer | About 1 to 1.5 hours | Higher fixed fare; useful for groups |
| Taxi or rideshare | About 1 to 1.5 hours | Variable fare; confirm before leaving Marathon |
| Bike for a serious rider | 4 to 6 hours of moving time | Low cash cost; high heat and traffic exposure |
| Flight | Not a practical city-pair option | No normal commercial hop between the two |
Ways To Travel From Marathon To Key West
Driving is the simplest way to get from Marathon to Key West because US-1 connects both cities directly. Public transit works for budget travelers, but the shuttle adds time and less flexibility for stops.
A rental car makes sense if Marathon is one stop in a longer Florida Keys trip. Check pickup hours, return location, and any one-way fee before you count it as cheaper than a shuttle or transfer.
If you need a car for the Keys rather than only this one ride, compare rentals before locking in your route:
- Drive: the right fit for Bahia Honda, Big Pine Key, and a flexible arrival time.
- Lower Keys Shuttle: the budget fit if your schedule can bend around the bus.
- Private transfer: the low-hassle fit for families, luggage, or a no-driving day.
- Taxi or rideshare: workable, but availability and price can swing by time of day.
No train runs between Marathon and Key West, and flying between the two cities is not a normal traveler option. Marathon has an airport, but the useful choice for this route is still land transportation.
Should You Drive, Shuttle, Or Book A Transfer?
Drive from Marathon to Key West if you want the stops; take the Lower Keys Shuttle if the lowest fare matters; use a transfer if you want door-to-door simplicity. The right choice depends less on mileage and more on parking, luggage, and how many stops you want.
For a day trip, driving gives you the cleanest schedule. Leave Marathon in the morning, stop once on the Lower Keys, park in Key West, and spend the rest of the day on foot around Old Town, Mallory Square, the Historic Seaport, and Duval Street.
For an overnight stay, a shuttle or transfer can be smarter. Key West rewards walking, biking, and local transit more than repeated car moves, especially if your hotel is near Old Town.
Stops That Make The 50 Miles Feel Worth It
The best stops between Marathon and Key West are short, scenic breaks that do not steal the whole day. Pick one or two stops, not five, if Key West is the main destination.
Start with the Seven Mile Bridge just west of Marathon, where the open-water stretch makes the route feel different from a normal Florida drive. Bahia Honda State Park sits near MM 37 and works well for a beach walk, a photo stop, or a longer swim break when you have time.
Big Pine Key is the main Lower Keys stop for travelers who want a slower pause before Key West. Drive carefully in this area because Key deer live here and can cross roads with little warning.
A tight stop plan looks like this:
- Fastest useful stop: Seven Mile Bridge viewpoint area near Marathon.
- Best nature stop: Bahia Honda State Park near MM 37.
- Best slow pause: Big Pine Key for lunch or a short detour.
- Best arrival move: park once in Key West and walk from there.
Where To Stay After The Drive
Key West is the better overnight base if you want sunset, late dining, and car-free wandering after the drive from Marathon. Marathon is the better base if you want quieter waterfront lodging and an easier next-morning drive north.
For one night in Key West, look near Old Town, the Historic Seaport, or the quieter edges of Truman Annex if you want to reduce parking headaches. For a lower nightly rate, compare lodging outside Old Town and factor in transportation before choosing.
Use the map to compare Key West lodging by walking distance, parking, and neighborhood:
The Route Verdict For Speed, Budget, And Low Stress
The right Marathon to Key West plan is simple once you match the trip to your constraint. Speed favors driving, budget favors the Lower Keys Shuttle, and comfort favors a private transfer or a one-night stay.
- For speed: drive US-1 straight through and leave before the late-day traffic build.
- For budget: take the Lower Keys Shuttle and build your day around the schedule.
- For stops: drive and limit yourself to Seven Mile Bridge plus one Lower Keys stop.
- For no parking stress: use a transfer or shuttle, then stay where you can walk.
- For an overnight: choose Key West if nightlife and sunset plans matter; choose Marathon if the next leg heads back toward the Middle or Upper Keys.
The distance from Marathon to Key West is short enough for an easy day trip, but the best version of the route is not rushed. Give the 50 miles enough room for one good stop, one clean parking plan, and a relaxed Key West arrival.
References & Sources
- Florida Keys & Key West Tourism Council.“Travel To and Around the Florida Keys and Key West.”Supports the Overseas Highway route, mile-marker system, Marathon and Key West mile-marker ranges, and Florida Keys driving context.