How Long Is the Drive From Miami to Key West?

If you’re wondering how long is the drive from Miami to Key West, the answer is: about 3.5 to 4 hours for roughly 160 miles, driving straight down the Overseas Highway (US-1) with no stops. That’s the number you’ll see on any map app. In practice, this drive is rarely done in one straight shot, and it shouldn’t be — the road itself, hugging bridges and turquoise water for the last hundred miles, is half the reason to make the trip.

The drive from Miami to Key West runs almost entirely on a single road: US-1, which becomes the Overseas Highway once it leaves the mainland and starts hopping between islands. Miami itself is a good place to start the clock — a city of 442,241 people (2020) known for Art Deco architecture, Cuban food, and easy access to the Everglades.

From there, the road heads southwest through Homestead, a farming town of 80,737 people that serves as the gateway to Everglades and Biscayne National Parks, with roadside fruit stands and a strong Latino food scene.

Next comes Key Largo, a diving and snorkeling hub of 10,433 people with marine parks and glass-bottom boat tours, followed by Islamorada, the “Village of Islands,” home to 7,107 people, excellent fishing, and waterfront taverns.

The road continues through Marathon, roughly the midpoint of the Keys and home to the Seven Mile Bridge, then on to Big Pine Key, a quiet town of 5,032 people best known for the National Key Deer Refuge, where tiny, endangered deer roam freely. From Big Pine Key, it’s a final short stretch to Key West itself.

US-1 through the Keys narrows to two lanes for much of the way, and there’s no shortcut once you’re on it — every car, truck, and RV shares the same road. Weekend traffic, holiday weekends, and peak winter season can turn a 4-hour drive into something noticeably longer. Weather matters too: a passing storm or high winds on the open bridges can slow things down. Building in extra time, especially if you’re aiming to reach Key West by a specific hour, is usually the safer bet.

Given how much there is to see along the way — diving in Key Largo, fishing in Islamorada, key deer in Big Pine Key — treating this as a straight-through drive misses the point. Spreading it over two or three days, with a night in the Upper or Middle Keys, turns a long car ride into a proper road trip.

This is exactly the kind of drive where a route with a lot of small, worthwhile stops benefits from a real day-by-day plan rather than a single Google Maps line. Journey Builder turns a vague idea like “drive from Miami to Key West” into a trip you can actually take. It builds the route automatically, with the distance and drive time for every leg, and ranks the towns along the way — Homestead, Key Largo, Islamorada, Marathon, Big Pine Key — showing whether each is right on your route or how far off it is. From there, its auto-scheduler turns your picks into a day-by-day plan that actually works, built around wake-up and bedtime, drive times, check-ins, and meals, usually in 1 to 3 minutes.

Whether you’re doing it in one long day or spreading it across the Keys, knowing how long is the drive from Miami to Key West is just the starting point — the real question is how you want to spend the miles in between. Pre-register with Journey Builder today at https://journeybuilder.app/pre-register and be ready to build this trip the moment it’s your turn.

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