South Bend to Sunman is 210 miles and takes about 4 hours 20 minutes via US 31 and US 421, with a fuel budget near $33 and enough daylight to finish in a day. This drive stays within Indiana, taking you from the Midwest region of South Bend down through more of the Midwest towards Sunman. With most of your travel on highways, this route is a straightforward connection. It's a good option for a single-day trip, allowing you to cover the distance without an overnight stay.
Trip Pace
Same-day drive is realistic
A same-day return is possible, but it will make for a full day on the road.
Break Rhythm
1 planned break
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
105 miles from South Bend, IN
A natural place for your longest stop of the day
, about 2h 14m into the drive
.
Main Roads
Road
Distance
Duration
US 31
93.5 mi
1h 56m
US 421
62.8 mi
1h 8m
South Michigan Street
28.2 mi
38m
I 69
10.5 mi
12m
Keystone Parkway
5.2 mi
7m
I 465
4 mi
4m
SR 101
3 mi
4m
North Dr. Martin Luther King Jr. Boulevard
0.6 mi
2m
Longest stretch:
US 31
— 93.5 mi, about 1h 56m
Traffic on I-465
Hour-of-day weekday pattern from 32 FHWA count stations on your route.
Peak
4 PM
~4,510 veh/hr typical
Quietest
2 AM
~444 veh/hr
Peak-to-quiet ratio
10.2×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 47 weeks of 2023 FHWA Travel Monitoring Analysis System data. Weekday hours only (Mon–Fri).
Turn-by-Turn Driving Directions
Step-by-step road directions between South Bend, IN and Sunman, IN.
1
Start on East Navarre Street
131 ft·12 sec·East Navarre Street
2
Turn left onto SR 933; BUS US 31
444 ft·12 sec·North Michigan Street
3
Enter roundabout onto North Michigan Street
125 ft·7 sec·North Michigan Street
4
Continue on North Michigan Street
196 ft·6 sec·North Michigan Street
5
Continue on North Dr. Martin Luther King Jr. Boulevard
0.6 mi·2 min·North Dr. Martin Luther King Jr. Boulevard
6
Continue on South Michigan Street
2.5 mi·6 min·South Michigan Street
7
Enter roundabout onto BUS US 31
125 ft·7 sec·South Michigan Street
8
Continue on BUS US 31
0.6 mi·1 min·South Michigan Street
9
Continue on BUS US 31
25 mi·29 min·South Michigan Street
10
Merge onto US 31
0.9 mi·1 min·US 31
11
Turn slight right
512 ft·6 sec
12
Continue on US 31
85 mi·1 hr 44 min·US 31
13
Turn right onto East 226th Street
270 ft·10 sec·East 226th Street
14
Turn left
320 ft·50 sec
15
Continue on this road
320 ft·25 sec·this road
16
Turn right onto East 226th Street
270 ft·9 sec·East 226th Street
17
Turn right onto US 31
8.0 mi·10 min·US 31
18
Take the exit
0.2 mi·28 sec
Exit 129BToward Keystone Parkway, Rangeline Road, Clay Terrace BoulevardUse the slight right lane.
19
Keep slight left at fork onto Keystone Parkway
5.2 mi·7 min·Keystone Parkway
Toward Keystone ParkwayUse the straight / slight right lanes.
20
Enter roundabout
137 ft·7 sec
Toward I 465: South Keystone Avenue
21
Continue
0.3 mi·32 sec
Toward I 465: South Keystone Avenue
22
Keep slight left at fork
430 ft·10 sec
Toward I 465 East: Keystone Avenue South
23
Keep slight right at fork
0.8 mi·2 min
Toward I 465 EastUse the slight left / right lanes.
24
Merge onto I 465
4.0 mi·4 min·I 465
25
Merge onto I 69; I 465
11 mi·12 min·I 69; I 465
Use the straight / slight right lanes.
26
Take the exit onto US 421
0.1 mi·15 sec·US 421
Exit 49Toward I 74 East, US 421 South: Cincinnati, Southeastern AvenueUse the slight right lane.
27
Keep slight left at fork onto US 421
63 mi·1 hr 8 min·US 421
Toward I 74 East, US 421 South: CincinnatiUse the slight left lane.
28
Take the exit
0.2 mi·32 sec
Exit 156Toward SR 101: Sunman, Milan
29
Turn right onto SR 101
3.0 mi·4 min·SR 101
30
Arrive at destination
SR 101
Trip Plan
Leaving South Bend in the morning is your best bet to maximize daylight for this 4 hour 20 minute drive. Since it's a single-day trip, you have flexibility with your stop. The longest continuous stretch on US 31 is just over 93 miles, so plan a break around that point if needed. Keep an eye on your fuel as you approach Sunman; while the estimated cost is $33, it's always good to top off before the final leg if you're running low.
Morning Departure
An early start around 7-8 AM gets you there with plenty of daylight left.
Evening Departure
A late afternoon start means arriving after dark. Morning is better.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 105 miles from South Bend, IN, or about 2h 14m into the drive.
The longest continuous stretch on this route runs about 93.5 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 46 miles or 1h 2m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 105 miles or 2h 14m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 3h 38m
Traffic, exits, and arrival timing usually matter more near Sunman, IN than in the middle of the route.
Before You Leave
+
Open the route before leaving South Bend, IN so your first major turns are already loaded.
+
Leave with enough water and a charging cable within reach, not packed away.
+
Check your fuel range against the first long segment, especially if you are starting outside city service areas.
Day 1
Settle into the route from South Bend, IN
This is one driving day of about 210 miles and 4h 20m.
Your first comfortable stop window is around 46 miles from South Bend, IN.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 1 real break rather than only quick fuel stops.
The longest stretch is on US 31 for about 93.5 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
First break
2.8 mi from route
~7 min detour
$10 to $20
Argos, Indiana
Hours: 11 am–11 pm
+15748926845
Place data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 21
5 decision points cluster between mile 122.8 and 144.1 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
8
122.8 mi into trip|~2h 39m in
Take the exit toward Keystone Parkway, Rangeline Road, Clay Terrace Boulevard
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Exit 129B
Toward Keystone Parkway, Rangeline Road, Clay T...
7
123 mi into trip|~2h 39m in|Keystone Parkway
Keep slight left at fork onto Keystone Parkway toward Keystone Parkway
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
Toward Keystone Parkway
7
128.6 mi into trip|~2h 48m in
Keep slight right at fork toward I 465 East
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight left / right lanes.
Toward I 465 East
8
144 mi into trip|~3h 7m in|US 421
Take the exit onto US 421 toward I 74 East, US 421 South: Cincinnati, Southeastern Avenue
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Exit 49
Toward I 74 East, US 421 South: Cincinnati, Sou...
8
144.1 mi into trip|~3h 7m in|US 421
Keep slight left at fork onto US 421 toward I 74 East, US 421 South: Cincinnati
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight left lane.
Toward I 74 East, US 421 South: Cincinnati
Fuel & Cost
Regular Gas
$31.01 one way
$62.02 round trip
$3.75/gal25.4 MPG avg74 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.14
$34.24
$68.47
premium
$4.72
$38.99
$77.98
diesel
$4.80
$39.65
$79.30
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$31
Meals
$25–$50
Total
$56–$81
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 73.5 kg one way.
Prices: EIA weekly data, 2026-07-13.
Driving Electric?
About $22 in charging
· 0 stops
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
63
0
$22.05
$10.08
Efficient EV
52.5
0
$18.38
$8.40
EV Truck/SUV
84
1
$29.40
$13.44
Gas CO2
73 kg
EV CO2
25 kg (66% 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 Jul 19, 2026
Origin
South Bend, IN
Afternoon
in South Bend on Sunday
Local time
1:38 PM
EDT
Current temp
61°F
Areas Of Smoke
N 5 to 10 mph0% chanceLive forecast
Special Weather Statement
Special Weather Statement issued July 18 at 7:06PM CDT by NWS Paducah KY
Special Weather Statement
Special Weather Statement issued July 18 at 8:00PM EDT by NWS Louisville KY
Destination
Sunman, IN
Afternoon
in Sunman on Sunday
Local time
1:38 PM
EDT
Current temp
67°F
Chance Showers And Thunderstorms then Showers And Thunderstorms
NW 3 to 7 mph75% chanceLive forecast
Special Weather Statement
Special Weather Statement issued July 18 at 7:06PM CDT by NWS Paducah KY
Special Weather Statement
Special Weather Statement issued July 18 at 8:00PM EDT by NWS Louisville KY
83°F
Arcadia, IN
105 mi in
Seasonal Notes
Summer travel usually means heavier construction, hotter rest stops, and busier weekend traffic around major cities.
Winter travel shortens daylight, so a route that looks manageable on paper can feel much longer after dark.
Holiday weekends tend to make both departure and arrival windows slower than the raw route time suggests.
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
6 degrees warmer at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
4h 20m on the road
An early start around 7-8 AM gets you there with plenty of daylight left.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
More Details
What kind of drive is this?
This route is primarily highway driving, with 85% of the trip on high-speed roads. You'll experience a long stretch of 93.5 miles on US 31 before transitioning to other roads. Expect a steady pace for the majority of your travel, with the road profile being mostly highway until you get closer to Sunman.
85% highway — fuel and pacing are the main things to plan.
30 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 93.5 mi on US 31.
How Hard Is This Drive?
9/10
This is a straightforward highway drive that stays mostly on US 31 and US 421. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 122.8 miles in.
Driving Effort9/10
High effort - long or complex enough to need steady focus all day
Balances navigation complexity with total wheel time.
This is a demanding drive. With 21 significant decision points across 210 miles, you will need to stay alert - especially through interchange areas and urban stretches. Consider splitting it into segments if you are not comfortable with fast highway navigation.
Where does it get tricky?
The main spots that need attention: at 122.8 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 123 miles (Keystone Parkway): Highway fork - watch signs carefully. Lane positioning matters here; at 128.6 miles: Highway fork - watch signs carefully. Lane positioning matters here.
South Bend is in Northern Indiana. The city's name is drawn from the fact that it's situated on the southernmost bend in the St. Joseph River. Together with neighboring Mishawaka they form a continuous urban area of about 325,000 (2020). South Bend is the home of the University of Notre Dame, but is also the former home of many large companies such as Studebaker, Oliver Chilled Plow, and Singer.
The area is now home to Crowe-Chizek, AM General (which makes military vehicles.), Bosch, Honeywell, and Woodwind & Brasswind. The city hopes to grow with the undertaking of a new nano-technology campus near the city, which has already brought new contracts for factories and businesses around the city of Southbend.
Top landmarks
•St. Casimir Parish, South Bend — church building in South Bend, United States of America
•Studebaker National Museum — museum in South Bend, Indiana, United States
•Tippecanoe Place — historic house in Indiana, United States
Doable as a same-day drive at 4h 20m. Total distance: 210 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
4h 20m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (85%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 93.5 miles on US 31. The full list of main roads is in the Roads section above.
Yes — we found about 11 rest areas or service plazas within a short detour of the route (from OpenStreetMap). See the Rest Stops tab under Nearby Places for locations and mile markers. Plan to stretch, use the bathroom, and top off fluids every 2–3 hours on longer drives.
It helps. This route has a higher-than-average number of complex decision points, which get harder in the dark. If the last hour of the trip is on surface roads or mountain grades, aim to arrive at Sunman, IN before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.
Only with planning. This is a long drive for kids — consider splitting it into two days rather than pushing through. Plan at least 1 meaningful breaks. There are 11 rest areas along the route for bathroom stops.
The main spots that need attention: at 122.8 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 123 miles (Keystone Parkway): Highway fork - watch signs carefully. Lane positioning matters here; at 128.6 miles: Highway fork - watch signs carefully. Lane positioning matters here.
Possible but tiring. At 4.3 hours each way, an in-and-out day trip would put you behind the wheel for 8.7 hours — manageable with a long break at Sunman, IN, but most travelers stay overnight.
