Key West, FL → Gatlinburg, TN

Your nearly 1,012-mile journey from Key West to Gatlinburg traces a fascinating arc through the southeastern United States, beginning on the Overseas Highway (US 1) before transitioning onto US 27 and eventually I-75 North. You'll spend your first hours island-hopping across the Florida Keys on that iconic two-lane highway, where the ocean frames both sides of your windshield, before crossing into mainland Florida near Miami. From there, the route carries you through central Florida on US 27, a quieter alternative to I-75 that winds through small towns and agricultural regions, though I-75 itself offers a faster corridor if time is your primary concern. Once you cross into Georgia and Tennessee, you'll merge onto I-75 North, which becomes your primary artery for the majority of the remaining drive toward the Great Smoky Mountains.

The landscape transformation along this route is dramatic and worth noting. Starting from sea level in the Keys, you gradually climb through the relatively flat terrain of central Florida before entering Georgia's gently rolling hills and forests. As you approach Tennessee, the terrain becomes noticeably more pronounced, with the Appalachian foothills rising incrementally before you reach the dramatic elevation changes surrounding Gatlinburg itself, which sits at approximately 1,300 feet. This elevation gain is gentle enough that it won't present major driving challenges, but you'll notice the shift in vegetation and air quality as you move northward.

You'll pass through or near several notable cities including Naples, Ocala, and the greater Atlanta metropolitan area, where urban congestion typically increases, particularly around I-75's intersection with I-285. The drive offers a nice balance of rural and developed sections, with plenty of opportunities to stop in charming towns along US 27 or larger rest areas along I-75. This route is most pleasant during spring (March to May) and fall (September to November), when temperatures are moderate and visibility is excellent. Summer months bring intense heat and afternoon thunderstorms, particularly through Florida and Georgia, while winter is generally mild but can occasionally present challenges in the Gatlinburg area.

The 1011-mile drive from Key West, Florida to Gatlinburg, Tennessee takes approximately 16h 57m under normal conditions. Weather along this route can vary significantly, especially across varying terrain where weather conditions can change rapidly. Route Outlook helps you find the safest time to travel by showing you weather conditions at every point along your route, timed to when you'll actually be there.

Common Weather Hazards on This Route

• Severe thunderstorms and flash flooding (spring and summer)
• Hurricane and tropical storm impacts (June through November)

Seasonal Driving Considerations

Weather along this route varies by season. Winter months can bring snow, ice, and reduced visibility, while summer may see thunderstorms, heat-related road issues, or construction zones. Spring and fall generally offer the most comfortable driving conditions but can still surprise with sudden weather changes. Regardless of season, checking real-time conditions along your entire route before departing can help you avoid the worst of it.

Best Time to Drive Key West to Gatlinburg

For long drives like this 1011-mile journey, planning is essential. Consider breaking the trip into segments if weather looks challenging. The best approach is to check conditions for multiple departure times using Route Outlook's optimizer, which considers weather at each point when you'll actually be there.

Driving Strategy

Covering 1011 miles from Key West to Gatlinburg is a full-day or multi-day drive that requires advance planning. Break the route into manageable segments, planning fuel and rest stops every 2-3 hours. Weather that looks fine at departure may deteriorate significantly at the midpoint. Consider booking overnight accommodation if the forecast shows deteriorating conditions in the latter half. Route Outlook's segment-level weather data helps you identify exactly where and when conditions will change.

Frequently Asked Questions