Key West to Biloxi Road Trip: Gulf Coast Guide

The drive from Key West to Biloxi spans approximately 800 miles across Florida’s coral keys and the Gulf Coast’s marshy plains. US Route 1 ends at Key West’s zero-mile marker, while Biloxi sits on Mississippi’s artificial sand beaches shaped by Hurricane Katrina’s aftermath. The Overseas Highway (US 1) alone covers 113 miles of bridges and causeways, including the Seven Mile Bridge—one of the world’s longest segmental concrete bridges.

This route crosses five states and two time zones, with driving times varying from 12 to 14 hours nonstop. But the real draw is the contrast: coral reefs and conch fritters give way to oyster reefs and casino lights. Is it worth driving Key West, FL to Biloxi, MS? Absolutely—if you embrace the Gulf’s layered history, from pirate lore to Creole cuisine.

The trip transitions from the Florida Keys National Marine Sanctuary—home to endangered sea turtles and corals—to the Apalachicola National Forest’s longleaf pines. In the Panhandle, the Eglin Air Force Base reservation covers miles of undeveloped coastline. Biloxi’s beaches are man-made, replenished with sand from offshore shoals.

• Key West: Dry Tortugas National Park (ferry required); coral reef snorkeling at Looe Key.
• Everglades: Shark Valley tram tours for alligator sightings.
• Biloxi: Deer Island for birdwatching; Gulf Islands National Seashore for pristine dunes.

Culinary infrastructure ranges from conch fritters at Key West’s Hogfish Grill to po’boys at Biloxi’s The Blind Tiger. Oyster farming has revived the local economy; try Apalachicola’s oysters before the bay’s decline affected harvests. For unique culture, stop at the Gullah Geechee Corridor in South Carolina—if you detour slightly inland.

UNESCO World Heritage Sites? None directly on route, but the Everglades National Park (UNESCO Biosphere Reserve) is a short detour from Naples. The route also passes near the San Marcos de Apalache Historic State Park (Spanish fort, National Historic Landmark).

The bulk of the drive follows I-10 from Jacksonville to Biloxi, but you can also take the more scenic US 98 along the coast. Gas stations cluster near every exit, but the Overseas Highway has limited services—fill up in Florida City before heading south. Tolls exist on I-95 and Florida’s Turnpike; carry a SunPass or cash.

• Best fuel stops: Marathon (FL mid-point), Pensacola (FL panhandle), Mobile (AL).
• Average gas cost for the trip: $100–$130 (sedan, regular).
• Road quality: Excellent on interstates; US 98 may have some rough patches post-hurricane.

For those wondering how long to drive Key West, FL to Biloxi, MS, plan for 13–15 hours of pure driving. But with stops for food, beaches, and historical sites, budget at least three days. Use how to find the best stops and hidden gems between cities to tailor your itinerary.

I-10 is well-lit and patrolled, but the Overseas Highway has long stretches with no breakdown lanes. Wildlife hazards include deer in the Panhandle and iguanas in the Keys. Gulf Coast summer heat (90°F+) can cause overheating; check coolant levels often.

• Family-friendly: The Dinosaur World in Plant City (exit off I-4) or the Gulfarium in Fort Walton Beach.
• Pet stops: Rest areas along I-10 have pet walks; the Keys have dog-friendly beaches at Higgs Beach.
• Fatigue management: Pull over at the Florida Welcome Center (US 231) or the Mississippi Rest Area (Exit 34). Recommended driving max: 4 hours between breaks.

Hidden off-route spots include the Weeki Wachee Springs (mermaid shows) near Tampa and the Big Lagoon State Park near Pensacola (kayaking in bioluminescent waters). For history, the Fort Pickens area near Pensacola offers Civil War earthworks with Gulf views.

Local commerce thrives in small towns like Apalachicola (antique shops) and St. George Island (seafood markets). Biloxi’s Hard Rock Casino and Beau Rivage anchor the gaming scene, but the Biloxi Lighthouse (1848) remains a free historical attraction.