How far is Harmony, MN from Key Largo, FL?
The driving distance from Harmony, MN to Key Largo, FL is about 1686.3 miles (2713.8 km), with a travel time of about 31h 55m by car.
- The straight-line flight distance is about 1433.3 miles (2306.6 km).
- For a round trip, plan for roughly 63h 50m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 7:30 AM CST.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
Flight Distance
Driving Distance
Gas Cost Calculator
Leave and Arrive Planner
Pick a departure time to see your estimated arrival and same-day return window.
Drive time stays fixed at 31h 55m.
Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
You are leaving earlier than the recommended window, which gives you extra margin for breaks and traffic.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
Town in Tennessee, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Driving Route Map
The map below follows the saved road route between Harmony and Key Largo.
Turn-by-Turn Driving Directions
Step-by-step road directions between Harmony and Key Largo.
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1
Start on 1st Street Northwest
14 m · 4 sec · 1st Street Northwest
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2
Turn right onto Main Avenue North
1.3 km · 2 min · Main Avenue North
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3
Continue on State Highway 139
14.4 mi · 20 min · State Highway 139
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4
Turn right onto State Highway 9
1 mi · 1 min · State Highway 9
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5
Continue on 2nd Avenue Southeast
1 mi · 2 min · 2nd Avenue Southeast
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6
Turn left onto 3rd Street Southwest
1 mi · 2 min · 3rd Street Southwest
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7
Continue on Willow Avenue
9.9 mi · 14 min · Willow Avenue
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8
Turn right onto 100th Street
1 mi · 1 min · 100th Street
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9
Turn left onto Union Avenue
9.7 mi · 13 min · Union Avenue
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10
Turn right onto State Highway 24
2539 ft · 56 sec · State Highway 24
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11
Turn left onto County Highway V56
133 m · 9 sec · County Highway V56
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12
Continue on Union Avenue
11.1 mi · 15 min · Union Avenue
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13
Continue on Viking Avenue
13.3 mi · 18 min · Viking Avenue
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14
Turn left onto 230th Street
3 mi · 4 min · 230th Street
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15
Turn right onto Y Avenue
5 mi · 9 min · Y Avenue
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16
Continue on North Black Hawk Buchanan Avenue
1375 ft · 33 sec · North Black Hawk Buchanan Avenue
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17
Turn left onto 102nd Street
1 mi · 1 min · 102nd Street
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18
Continue on Fairbank Street
1223 ft · 28 sec · Fairbank Street
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19
Turn right onto Walnut Street South
1337 ft · 46 sec · Walnut Street South
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20
Continue on Baxter Avenue
1.5 mi · 2 min · Baxter Avenue
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21
Enter the roundabout and take exit 2 toward Baxter Avenue
41 m · 3 sec · Baxter Avenue
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22
Exit the roundabout onto Baxter Avenue
9 mi · 12 min · Baxter Avenue
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23
Continue on Main Street
1.6 km · 2 min · Main Street
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24
At the end of the road, turn left onto South Street
1395 ft · 30 sec · South Street
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25
Turn right onto Benson Shady Grove Avenue
7.1 mi · 10 min · Benson Shady Grove Avenue
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26
Continue on South Black Hawk Buchanan Avenue
1.1 mi · 2 min · South Black Hawk Buchanan Avenue
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27
Take the ramp left
1732 ft · 42 sec
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28
Merge slight left onto Avenue of the Saints
105.5 mi · 1 hr 59 min · Avenue of the Saints
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29
Keep slight left to continue on Avenue of the Saints
89.9 mi · 1 hr 44 min · Avenue of the Saints
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30
Continue on Avenue of the Saints
3.9 mi · 5 min · Avenue of the Saints
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31
Turn right
1.7 mi · 2 min
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32
Turn right onto Veterans Road
3.2 mi · 6 min · Veterans Road
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33
At the end of the road, turn left onto County Road 422
85 m · 7 sec · County Road 422
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34
Continue on Paris Gravel Road
2539 ft · 1 min · Paris Gravel Road
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35
Take the ramp right
37 m · 3 sec
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36
Merge slight left onto Avenue of the Saints
101.3 mi · 2 hr 1 min · Avenue of the Saints
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37
Continue on Daniel Boone Expressway
5.7 mi · 7 min · Daniel Boone Expressway
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38
Continue on Jack Buck Memorial Highway
7 mi · 9 min · Jack Buck Memorial Highway
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39
Continue on Congressman William L. Clay Sr. Bridge
2220 ft · 38 sec · Congressman William L. Clay Sr. Bridge
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40
Keep slight left to continue on I 55 North, I 64 East, US 40 East: Chicago, Loiusville, Indianapolis
2.3 mi · 3 min
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41
Keep slight right to continue on I 64 East, IL 3 North: Louisville
75.1 mi · 1 hr 23 min
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42
Keep slight right to continue on Ken Gray Expressway
47.2 mi · 51 min · Ken Gray Expressway
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43
Take the exit slight right toward I 24 East: Nashville
1.4 mi · 1 min
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44
Continue straight
175.1 mi · 3 hr 8 min
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45
Keep slight right to continue on I 24 East, I 65 South: Nashville
2.3 mi · 3 min
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46
Continue on I 24 East: Chattanooga, Knoxville
2.8 mi · 4 min
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47
Keep slight left to continue on I 40 East, I 24 East: Knoxville, Chattanooga
2.1 mi · 3 min
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48
Take the exit slight right toward I 24 East: Chattanooga
133.7 mi · 2 hr 30 min
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49
Keep slight right to continue on I 75 South: Atlanta
2869 ft · 49 sec
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50
Merge slight left
110.7 mi · 2 hr 3 min
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51
Continue on James Wendell George Parkway
2.3 mi · 3 min · James Wendell George Parkway
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52
Keep slight left
64.8 mi · 1 hr 12 min
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53
Keep slight right to continue on Larry Justice Highway
16.1 mi · 17 min · Larry Justice Highway
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54
Merge slight left onto Fall Line Freeway
299.4 mi · 5 hr 21 min · Fall Line Freeway
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55
Take the exit slight left toward Florida's Turnpike South, Orlando
261 mi · 4 hr 43 min · Florida's Turnpike
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56
Take the exit slight right toward Florida's Turnpike Toll South, Homestead
1197 ft · 20 sec · Homestead Extension of Florida's Turnpike
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57
Keep slight left to continue on Homestead Extension of Florida's Turnpike
46.9 mi · 54 min · Homestead Extension of Florida's Turnpike
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58
Keep slight left
2930 ft · 1 min
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59
Merge slight left onto Dixie Highway
19.2 mi · 27 min · Dixie Highway
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60
Continue on Overseas Highway
9.3 mi · 16 min · Overseas Highway
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61
Continue on Overseas Highway
138 m · 28 sec · Overseas Highway
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62
Turn right onto Harbor Drive
94 m · 14 sec · Harbor Drive
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63
Arrive at your destination
0 m · 1 sec · Harbor Drive
Car Route Details
A richer read on the saved driving route between Harmony and Key Largo.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
Fall Line Freeway
Merge slight left onto Fall Line Freeway
299 mi · 05h 21m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
Better with a longer stop
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
Partly Cloudy leaving Harmony and Sunny near Key Largo.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Harmony to Key Largo?
The road trip is about 1686.3 miles (2713.8 km) and usually takes 31h 55m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
What is the halfway point on this route?
Lookout Mountain is a useful midpoint, sitting about 839.3 miles from Harmony and 846.9 miles from Key Largo.
How much longer is the road route than the straight-line distance?
The direct path is about 1433.3 miles (2306.6 km), while the road route adds roughly 253 extra miles because roads do not follow the straight air line.
When is the best time to leave for this route?
A good departure window is usually 6:00 AM to 7:30 AM CST. Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $237.88 one way or $475.76 round trip. Estimated CO2 is about 528.8 kg one way.
Do you cross a time zone on this route?
Yes. There is about a 1 hour time difference between Harmony and Key Largo, so arrival and return times should be read in local time.
What should you check before leaving?
Before you leave, expect Partly Cloudy around Harmony and Sunny near Key Largo.
Flight Path Map
This map shows the direct air route between Harmony and Key Largo. Straight-line distance: 1433.22 mi (2306.55 km).
#1 Harmony
City in Minnesota, United States
| Population | 410 |
| Coordinates | 43.5552400, -92.0101600 |
| Altitude | 412 |
| Country | United States |
#2 Key Largo
Census designated place in Florida, United States
| Population | 10,433 |
| Coordinates | 25.0865200, -80.4472800 |
| Altitude | 2 |
| Country | United States |
End: Key Largo (-80.44728, 25.08652)
Estimated Travel Time
Distance: 2714 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 56h 11m |
| 40 mph (64.37 km/h) | 42h 09m |
| 50 mph (80.47 km/h) | 33h 43m |
| 60 mph (96.56 km/h) | 28h 06m |
| 70 mph (112.65 km/h) | 24h 05m |
| 80 mph (129 km/h) | 21h 02m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.00 | $237.88 | $475.76 |
| Mid-grade | $4.48 | $266.38 | $532.76 |
| Premium | $5.00 | $297.74 | $595.48 |
| Diesel | $6.12 | $364.02 | $728.04 |
Assumes 8.3 L/100 km (about 28.3 MPG). CO2 is an estimate and varies by vehicle, fuel blend, traffic, and terrain.
Prices in Minnesota · Nov 06, 2026