How far is Ann Arbor, MI from Flat Rock, MI?
The driving distance from Ann Arbor, MI to Flat Rock, MI is about 420.7 miles (677 km), with a travel time of about 07h 43m by car.
- The straight-line flight distance is about 298.8 miles (480.9 km).
- For a round trip, plan for roughly 15h 26m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 7:30 AM EDT.
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 07h 43m.
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.
Township in Otsego County, Michigan
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny then Slight Chance Showers And Thunderstorms
Chance Rain Showers
Driving Route Map
The map below follows the saved road route between Ann Arbor and Flat Rock.
Turn-by-Turn Driving Directions
Step-by-step road directions between Ann Arbor and Flat Rock.
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1
Start on South State Street
1325 ft · 43 sec · South State Street
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2
Turn left onto East Huron Street
2058 ft · 1 min · East Huron Street
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3
Turn right onto North Main Street
1.2 mi · 3 min · North Main Street
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4
Take the ramp straight toward M 14 East, US 23: Flint, Detroit
835 ft · 20 sec
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5
Merge slight left
1.1 mi · 1 min
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6
Keep left to continue on US 23 North: Flint
94.7 mi · 1 hr 42 min
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7
Keep slight left
62.9 mi · 1 hr 3 min
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8
Keep slight left
117.6 mi · 2 hr 1 min
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9
Take the exit slight right toward US 2: Manistique, Escanaba
1913 ft · 1 min
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10
Merge slight left onto US-2 West
1.1 km · 1 min · US-2 West
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11
Continue on US 2
3.2 mi · 4 min · US 2
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12
Continue on US-2 West
129.5 mi · 2 hr 33 min · US-2 West
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13
Turn right onto South Hill Road
120 m · 11 sec · South Hill Road
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14
Continue on Blackwell Avenue
1279 ft · 35 sec · Blackwell Avenue
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15
Continue on South Hill Road
1 km · 2 min · South Hill Road
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16
Continue on County 420 21st Road
3 mi · 4 min · County 420 21st Road
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17
Turn left onto County 426 M.5 Road
1 mi · 1 min · County 426 M.5 Road
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18
Turn right onto County 416 20th Road
3.5 mi · 5 min · County 416 20th Road
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19
Arrive at your destination
0 m · 1 sec · 20th Road
Car Route Details
A richer read on the saved driving route between Ann Arbor and Flat Rock.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
US-2 West
Continue on US-2 West
130 mi · 02h 33m
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.
Sunny then Slight Chance Showers And Thunderstorms leaving Ann Arbor and Chance Rain Showers near Flat Rock.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Ann Arbor to Flat Rock?
The road trip is about 420.7 miles (677 km) and usually takes 07h 43m 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?
Otsego Lake is a useful midpoint, sitting about 210.2 miles from Ann Arbor and 210.5 miles from Flat Rock.
How much longer is the road route than the straight-line distance?
The direct path is about 298.8 miles (480.9 km), while the road route adds roughly 121.9 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 EDT. 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 $55.96 one way or $111.92 round trip. Estimated CO2 is about 131.9 kg one way.
What should you check before leaving?
Before you leave, expect Sunny then Slight Chance Showers And Thunderstorms around Ann Arbor and Chance Rain Showers near Flat Rock.
Stop Ideas Near Otsego Lake
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Otsego Lake.
Boyne City, Michigan
Walloon Lake, Michigan
Petoskey, Michigan
Alanson, MI
Flight Path Map
This map shows the direct air route between Ann Arbor and Flat Rock. Straight-line distance: 298.81 mi (480.89 km).
#1 Ann Arbor
The most populous city in Washtenaw County, Michigan.
| Population | 119,280 |
| Coordinates | 42.2775600, -83.7408800 |
| Altitude | 269 |
| Country | United States |
#2 Flat Rock
City in Michigan, United States
| Population | 9,959 |
| Coordinates | 45.8258000, -87.1834700 |
| Altitude | 234 |
| Country | United States |
End: Flat Rock (-87.18347, 45.8258)
Estimated Travel Time
Distance: 677 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 14h 00m |
| 40 mph (64.37 km/h) | 10h 31m |
| 50 mph (80.47 km/h) | 08h 24m |
| 60 mph (96.56 km/h) | 07h 00m |
| 70 mph (112.65 km/h) | 06h 00m |
| 80 mph (129 km/h) | 05h 14m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $55.96 | $111.92 |
| Mid-grade | $4.25 | $63.11 | $126.23 |
| Premium | $4.65 | $69.07 | $138.13 |
| Diesel | $5.30 | $78.71 | $157.42 |
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 Michigan · May 05, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.