Trip from Flint, MI to Saint Louis, MI

Last recalculated Apr 16, 2026

Drive Time

1h 27m

Distance

70.9 mi

114 km

Drive Score

9/10

Great drive

Same Day?

Yes, doable

Fuel Cost

$11

one way

Best Time to Leave

Save up to 20 min

4 AM

1h 20m ★

6 AM

1h 27m

8 AM

1h 40m

10 AM

1h 32m

12 PM

1h 30m

3 PM

1h 32m

5 PM

1h 40m

8 PM

1h 23m

Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.

Best Time Drive vs Fly

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Saint Louis, MI

Amicia Short

Trip Overview

This 70.9-mile journey from Flint to Saint Louis, Michigan, is a manageable 1-hour and 27-minute drive, making it an excellent option for a day trip. You'll primarily navigate on I-75, Gratiot Road, and East Monroe Road, with about 47% of the route utilizing highway driving. The estimated fuel cost for this trip is around $11, offering a budget-friendly excursion within the Midwest region. Given its short duration and minimal stops, you can easily complete this drive in a single day, allowing for flexibility in your departure time and schedule.

Trip Pace

Same-day drive is realistic

A same-day return is realistic if you keep stops short.

Break Rhythm

0 planned breaks

A short stop every 2 to 3 hours is enough for this drive.

Midpoint

35.4 miles from Flint, MI

A natural place for your longest stop of the day , about 40m into the drive .

Drive Character

Expect a mixed driving experience on this route, with a substantial portion, nearly half, on the interstate. The longest uninterrupted stretch you'll encounter is 23.4 miles on I-75, providing a good opportunity for consistent speed. As you transition between I-75 and local roads like Gratiot Road and East Monroe Road, the driving pace will likely vary. This blend of highway and local road travel offers a dynamic feel, shifting from efficient travel to a more community-oriented pace.

Expect a mix of faster highway mileage and slower local approaches near the beginning or end.

There are about 30 navigation steps in the underlying route data, so the final approach matters more than the middle miles.

I 75 is the longest continuous segment at about 23.4 miles.

How Hard Is This Drive?

This route mixes highway mileage with some local-road sections near the start or finish. You will hit about 13 points where you need to pay attention to lane position or signs. The trickiest moment comes early in the drive near M 21 / East Court Street.

Route Complexity 5/10

Moderate - straightforward overall, but long enough or busy enough to require pacing

This drive requires moderate attention. Across 70.9 miles you will encounter 13 spots where lane choice or exit timing matters. Not difficult for experienced highway drivers, but worth previewing the tricky sections before you go.

Where does it get tricky?

The main spots that need attention: near the start (M 21 / East Court Street): Sharp turn - reduce speed on approach; at 0.1 miles (Saginaw Street): Navigation decision point; at 33.9 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one.

Critical Maneuvers

5 of 13 key points

These are the spots where you need to pay the most attention. Preview them before you drive.

0 mi into trip | ~0m in | M 21 / East Court Street

Turn uturn onto M 21 / East Court Street

Sharp turn - reduce speed on approach

0.1 mi into trip | ~0m in | Saginaw Street

Turn right onto Saginaw Street

Navigation decision point

33.9 mi into trip | ~38m in

Take the exit toward M 46: Buena Vista, Sandusky

Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one

Exit 149 Toward M 46: Buena Vista, Sandusky

34.1 mi into trip | ~38m in | M 46 / East Holland Avenue

Enter roundabout onto M 46 / East Holland Avenue

Roundabout - know your exit number before entering

34.4 mi into trip | ~39m in | M 46 / East Holland Avenue

Enter roundabout onto M 46 / East Holland Avenue

Roundabout - know your exit number before entering

Towns Mentioned on Route Signs

Based on OSRM destination-sign hints, not a full list of every settlement the road passes.

Between Flint, MI and Saint Louis, MI, road signs point toward M 46: Buena Vista and Sandusky.

M 46: Buena Vista

33.9 mi in | ~38m

Sandusky

33.9 mi in | ~38m

Main Roads

Road	Distance	Duration
I 75	23.4 mi	25m
Gratiot Road	16.7 mi	19m
East Monroe Road	10.4 mi	14m
UAW Freeway	9.7 mi	10m
Sheridan Avenue	1.9 mi	2m
East Saginaw Street	1.6 mi	2m
East Holland Avenue	1.3 mi	1m
Gratiot Avenue	1.3 mi	1m

Longest stretch: I 75 — 23.4 mi, about 25m

Turn-by-Turn Driving Directions

Step-by-step road directions between Flint, MI and Saint Louis, MI.

Start on this road

93 ft · 11 sec · this road

Turn uturn onto M 21

253 ft · 17 sec · East Court Street

Turn right onto Saginaw Street

0.1 mi · 28 sec · Saginaw Street

Turn right onto East Third Street

0.4 mi · 1 min · East Third Street

Turn left onto Chavez Drive

483 ft · 13 sec · Chavez Drive

Take the ramp

0.2 mi · 28 sec

Toward I 475 North

Merge onto I 475

9.7 mi · 10 min · UAW Freeway

Merge onto I 75; US 23

23 mi · 25 min · I 75; US 23

Take the exit

0.2 mi · 44 sec

Exit 149 Toward M 46: Buena Vista, Sandusky

Enter roundabout onto M 46

13 ft · 0 sec · East Holland Avenue

Continue on M 46

0.2 mi · 15 sec · East Holland Avenue

Enter roundabout onto M 46

106 ft · 5 sec · East Holland Avenue

Continue on M 46

1.1 mi · 1 min · East Holland Avenue

Use the straight / left lanes.

Turn slight right onto M 46

1.1 mi · 1 min · East Remington Street

Turn left onto M 46

1.9 mi · 2 min · Sheridan Avenue

Continue on M 46

0.4 mi · 34 sec · Williams Street

Use the straight / right lanes.

Turn left onto Gratiot Avenue

1.3 mi · 1 min · Gratiot Avenue

Use the left lane.

Continue on M 46

11 mi · 13 min · Gratiot Road

Continue on M 46

0.6 mi · 40 sec · East Saginaw Street

Continue on M 46

0.1 mi · 9 sec · North Saginaw Street

Continue on M 46

4.1 mi · 4 min · Gratiot Road

Continue on M 46

0.5 mi · 1 min · Saginaw Street

Continue on M 46

0.7 mi · 1 min · West Saginaw Street

Continue on M 46

1.2 mi · 1 min · Gratiot Road

Continue on M 46

5.0 mi · 7 min · East Monroe Road

Continue on M 46

1.0 mi · 2 min · East Saginaw Street

Continue on M 46

5.4 mi · 7 min · East Monroe Road

Continue on M 46

0.6 mi · 1 min · East Washington Street

Turn right onto North Main Street

173 ft · 5 sec · North Main Street

Arrive at destination

North Main Street

Trip Plan

For this straightforward 70.9-mile drive, consider departing mid-morning to avoid peak commuter traffic in Flint. With a total duration of just under 1.5 hours and no recommended stops, you have the flexibility to depart whenever is most convenient. The fuel cost is minimal at approximately $11, so you likely won't need to worry about frequent refueling. Keep an eye out for the transition points between I-75 and the local roads; these can sometimes involve changes in speed limits or traffic patterns, so staying alert will ensure a smooth continuation of your journey.

Morning Departure

Leave by 9 AM and you'll arrive before lunch.

Evening Departure

Even a 4 PM departure gets you there before dark in summer.

You can normally do this drive in one day.

You may only need one short stretch break if traffic stays light.

The halfway point lands around 35.4 miles from Flint, MI, or about 40m into the drive.

The longest continuous stretch on this route runs about 23.4 miles.

This is a comfortable same-day trip.

Departure

Before you leave

Start with fuel, water, and navigation already sorted so the first hour feels easy.

First stop

Around 16 miles or 18m in

Use this first pause for coffee, a restroom break, and a quick traffic check ahead.

Halfway reset

Around 35.4 miles or 40m in

This is the best place for your longest stop, a real meal, and a full fuel check.

Final approach

Final hour starts around 1h 10m

Traffic, exits, and arrival timing usually matter more near Saint Louis, MI than in the middle of the route.

Before You Leave

Open the route before leaving Flint, MI so your first major turns are already loaded.

Day 1

Settle into the route from Flint, MI

This is one driving day of about 70.9 miles and 1h 27m.

Your first comfortable stop window is around 16 miles from Flint, MI.

This route can stay practical as a one-day drive if traffic stays reasonable.

The longest stretch is on I 75 for about 23.4 miles.

Where to Stop

Rest stops, refuel points, and overnight suggestions along this route.

Halfway Point

Midpoint

About 35.4 mi from Flint, MI · 40m into the drive

Mid-route town

Meal stop

Buena Vista, MI

35 mi into the route

Best for: Lunch, fuel, and a longer reset

This sits close to the middle of the route, so it works well for the longest stop of the day.

Pacing Suggestions

Birch Run, MI

Fuel and coffee

A short stop after about 16 miles helps settle the day before fatigue starts building.

Buena Vista, MI

Meal break

The midpoint is around 35.4 miles from Flint, MI, which is a good place for a longer meal and fuel stop.

Arriving in Saint Louis, MI

The final approach into Saint Louis, MI usually feels slower than the middle of the drive, so avoid planning your tightest schedule at the very end.

These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.

Fuel & Cost

Regular Gas

$11.08 one way

$22.17 round trip

$3.97/gal 25.4 MPG avg 25 kg CO₂

Fuel Type	$/gal	One Way	Round Trip
midgrade	$4.36	$12.17	$24.34
premium	$4.89	$13.64	$27.29
diesel	$5.61	$15.65	$31.31

No toll roads detected on this route.

Estimated Trip Cost (one way, 1 person)

Fuel

$11

Meals

$25–$50

Total

$36–$61

Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.

Estimated CO2 emission: 24.8 kg one way. Prices: EIA weekly data, 2026-04-13.

Driving Electric?

About $7 in charging · 0 stops · 68% less CO₂

Vehicle Type	kWh	DC Fast	Home Charge
Average EV	21.3	$7.44	$3.40
Efficient EV	17.7	$6.20	$2.84
EV Truck/SUV	28.4	$9.93	$4.54

Gas CO2

25 kg

EV CO2

8 kg (68% less)

This trip is well within single-charge range for most EVs. No charging stops needed if you start fully charged.

DC fast charging avg $0.35/kWh. Home charging avg $0.16/kWh. US grid CO2: 0.39 kg/kWh.

Travel Intel

Current conditions at both ends of the drive.

Forecast as of Apr 15, 2026

Origin

Flint, MI

Night in Flint on Wednesday

Local time

10:39 PM

EDT

Current temp

46°F

Unavailable

Live forecast

Destination

Saint Louis, MI

Night in Saint Louis on Wednesday

Local time

10:39 PM

EDT

Current temp

45°F

Unavailable

Live forecast

Time zone

Same local time

Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.

Temperature spread

1 degrees cooler at arrival

A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.

Road read

1h 27m on the road

Use the two city cards together: check the sky where you start, then compare it with the local time and temperature at arrival.

Weather data from the National Weather Service. Conditions may change; check closer to your travel date.

Frequently Asked Questions

The drive from Flint, MI to Saint Louis, MI covers 70.9 miles and takes about 1h 27m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.

The main roads are I 75, Gratiot Road, East Monroe Road. Expect a mix of highway and local road driving.

This is a comfortable same-day trip.

The midpoint is about 35.4 miles from Flint, MI. Look for rest areas, gas stations, or food options near the halfway mark.

At current regular gas prices, expect to spend about $11.08 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.

Leave by 9 AM and you'll arrive before lunch. Even a 4 PM departure gets you there before dark in summer.