How far is Union, MI from Ann Arbor, MI?
The driving distance from Union, MI to Ann Arbor, MI is about 140.3 miles (225.8 km), with a travel time of about 02h 25m by car.
- The straight-line flight distance is about 114.3 miles (184 km).
- For a round trip, plan for roughly 04h 50m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM EST.
Reverse, save, or send this route
This route works well as a day trip with time at the destination. Copy the route link, send it to another device, or print a clean version before you head out.
This route works well as a day trip with time at the destination.
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 02h 25m.
A morning start gives you useful time at the destination and keeps the return out of the late evening.
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.
Unincorporated community in Michigan
Route Weather Snapshot
Check the forecast at both ends before you head out.
Scattered Rain Showers
Mostly Cloudy then Slight Chance Light Rain
Driving Route Map
The map below follows the saved road route between Union and Ann Arbor.
Turn-by-Turn Driving Directions
Step-by-step road directions between Union and Ann Arbor.
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1
Start on US-12
6.1 mi · 8 min · US-12
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2
Continue on West Chicago Road
1444 ft · 32 sec · West Chicago Road
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3
At the end of the road, turn left onto West Chicago Road
1113 ft · 28 sec · West Chicago Road
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4
Turn left onto Riverside Drive
4.6 mi · 6 min · Riverside Drive
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5
Turn left onto Constantine Bypass
3.1 mi · 4 min · Constantine Bypass
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6
Continue on US-131
16.6 mi · 19 min · US-131
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7
Continue on South Grand Street
8.8 mi · 10 min · South Grand Street
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8
Take the exit slight right toward I 94 East: Detroit
1 km · 1 min
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9
Merge slight left
96.8 mi · 1 hr 44 min
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10
Keep slight right to continue on I 94, I 94 Business: Detroit, Ann Arbor
3011 ft · 37 sec
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11
Take the exit slight right toward I 94 Business: Ann Arbor
3 mi · 7 min
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12
Turn right onto South State Street
1325 ft · 36 sec · South State Street
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13
Arrive at your destination
0 m · 1 sec · South State Street
Car Route Details
A richer read on the saved driving route between Union and Ann Arbor.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
I 94 East
Merge slight left
96.8 mi · 01h 44m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A comfortable day-trip route
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
Scattered Rain Showers leaving Union and Mostly Cloudy then Slight Chance Light Rain near Ann Arbor.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Union to Ann Arbor?
The road trip is about 140.3 miles (225.8 km) and usually takes 02h 25m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
What is the halfway point on this route?
Brownlee Park is a useful midpoint, sitting about 70.3 miles from Union and 70 miles from Ann Arbor.
How much longer is the road route than the straight-line distance?
The direct path is about 114.3 miles (184 km), while the road route adds roughly 26 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 8:00 AM to 10:00 AM EST. If you want a more comfortable same-day return, try to leave by 1:40 PM EST.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $21.80 one way or $43.60 round trip. Estimated CO2 is about 44 kg one way.
What should you check before leaving?
Before you leave, expect Scattered Rain Showers around Union and Mostly Cloudy then Slight Chance Light Rain near Ann Arbor.
Stop Ideas Near Brownlee Park
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 Brownlee Park.
Battle Creek Transportation Center
Albion station
Kalamazoo Transportation Center
Jackson station
Flight Path Map
This map shows the direct air route between Union and Ann Arbor. Straight-line distance: 114.31 mi (183.96 km).
#1 Union
Township in Cass County, Michigan
| Population | 440 |
| Coordinates | 41.7861600, -85.8677800 |
| Altitude | 248 |
| Country | United States |
#2 Ann Arbor
The most populous city in Washtenaw County, Michigan.
| Population | 119,280 |
| Coordinates | 42.2775600, -83.7408800 |
| Altitude | 269 |
| Country | United States |
End: South State Street (-83.740762, 42.277562)
Estimated Travel Time
Distance: 226 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 04h 40m |
| 40 mph (64.37 km/h) | 03h 30m |
| 50 mph (80.47 km/h) | 02h 48m |
| 60 mph (96.56 km/h) | 02h 20m |
| 70 mph (112.65 km/h) | 02h 00m |
| 80 mph (129 km/h) | 01h 45m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.40 | $21.80 | $43.60 |
| Mid-grade | $5.08 | $25.15 | $50.29 |
| Premium | $5.68 | $28.12 | $56.24 |
| Diesel | $6.63 | $32.81 | $65.62 |
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 · Nov 05, 2026