Indianapolis to Flat Rock is 38.2 miles and takes about 50 minutes via I 65, with a fuel budget near $6 and enough daylight to finish in a day. This short drive stays within the Midwest region, specifically within Indiana, making it a straightforward trip. It's primarily a highway route, so you'll experience consistent speeds for most of the way. Consider this an easy option when you need to get from point A to point B without much fuss.
Main Roads
Road
Distance
Duration
I 65
30.4 mi
34m
Old State Road 252
5.9 mi
10m
East Market Street
0.5 mi
1m
East Washington Street
0.2 mi
<1m
County Road 1100 South
0.1 mi
<1m
Monument Circle
0.1 mi
<1m
North Park Avenue
<0.1 mi
<1m
Longest stretch:
I 65
— 30.4 mi, about 34m
Traffic on I-65
Hour-of-day weekday pattern from 92 FHWA count stations on your route.
Peak
4 PM
~4,951 veh/hr typical
· worst 5,732
Quietest
1 AM
~498 veh/hr
Peak-to-quiet ratio
9.9×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 99 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 Indianapolis, IN and Flat Rock, IN.
1
Start on this road
257 ft·32 sec·this road
2
Turn left
37 ft·9 sec
3
Turn left onto Monument Circle
0.1 mi·23 sec·Monument Circle
4
Turn right onto East Market Street
0.5 mi·1 min·East Market Street
5
Turn right onto North Park Avenue
512 ft·23 sec·North Park Avenue
6
At end of road, turn left onto East Washington Street
0.2 mi·33 sec·East Washington Street
7
Take the ramp
0.2 mi·29 sec
Toward I 65 South, I 70 West: Louisville, Saint Louis
8
Keep slight left at fork
0.2 mi·19 sec
Toward I 65 South, I 70 West: Louisville, Saint Louis, East Street
9
Merge onto I 65; I 70
0.4 mi·33 sec·I 65; I 70
10
Keep slight left at fork onto I 65
30 mi·34 min·I 65
Use the slight left lane.
11
Take the exit
0.4 mi·45 sec
Exit 80Toward SR 252: Flat Rock, Edinburgh
12
Turn left onto SR 252
0.1 mi·15 sec·County Road 1100 South
13
Continue on Old State Road 252
5.9 mi·10 min·Old State Road 252
14
Arrive at destination
Old State Road 252
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
The midpoint is around 19.1 miles from Indianapolis, IN, which is a good place for a longer meal and fuel stop.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
Heads-up: tricky spots
5 of 11
5 decision points cluster between mile 0.1 and 31.8 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
5
0.1 mi into trip|~0m in|Monument Circle
Turn left onto Monument Circle
Navigation decision point
6
0.8 mi into trip|~3m in|East Washington Street
At end of road, turn left onto East Washington Street
Complex interchange - multiple decisions in a short stretch
7
1.2 mi into trip|~4m in
Keep slight left at fork toward I 65 South, I 70 West: Louisville, Saint Louis, East Street
Highway fork - watch signs carefully. Multiple destination signs - pick the right one
Toward I 65 South, I 70 West: Louisville, Saint...
6
1.8 mi into trip|~5m in|I 65
Keep slight left at fork onto I 65
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight left lane.
6
31.8 mi into trip|~39m in
Take the exit toward SR 252: Flat Rock, Edinburgh
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Exit 80
Toward SR 252: Flat Rock, Edinburgh
Fuel & Cost
Regular Gas
$5.92 one way
$11.85 round trip
$3.94/gal25.4 MPG avg13 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.32
$6.49
$12.99
premium
$4.93
$7.41
$14.82
diesel
$5.60
$8.42
$16.84
No toll roads detected on this route.
Drive Cost (one way)
Fuel
$6
Estimated CO2 emission: 13.4 kg one way.
Prices: EIA weekly data, 2026-08-31.
Driving Electric?
About $4 in charging
· 0 stops
· 69% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
11.5
0
$4.01
$1.83
Efficient EV
9.6
0
$3.34
$1.53
EV Truck/SUV
15.3
0
$5.35
$2.44
Gas CO2
13 kg
EV CO2
4 kg (69% 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 Sep 2, 2026
Origin
Indianapolis, IN
Morning
in Indianapolis on Friday
Local time
6:20 AM
EDT
Current temp
75°F
Mostly Clear
SW 3 to 8 mph14% chanceLive forecast
Heat Advisory
Heat Advisory issued September 2 at 5:51PM EDT until September 4 at 8:00PM EDT by NWS Wilmington OH
Heat Advisory
Heat Advisory issued September 2 at 2:47PM CDT until September 3 at 9:00PM CDT by NWS Chicago IL
Destination
Flat Rock, IN
Morning
in Flat Rock on Friday
Local time
6:20 AM
EDT
Current temp
74°F
Mostly Clear
SSW 3 mph14% chanceLive forecast
Heat Advisory
Heat Advisory issued September 2 at 5:51PM EDT until September 4 at 8:00PM EDT by NWS Wilmington OH
Heat Advisory
Heat Advisory issued September 2 at 2:47PM CDT until September 3 at 9:00PM CDT by NWS Chicago IL
90°F
Beech Grove, IN
19 mi in
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
50m on the road
The weather snapshot is not static. If you are leaving later, give both cities one more quick forecast check before departure.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
More Details
What kind of drive is this?
About 80% of this 38.2-mile route is highway, mainly on I 65. You'll encounter a longest stretch of 30.4 miles on I 65, offering uninterrupted driving. The transition to surface roads happens later in the trip. Expect a relatively smooth ride with minimal turns as you head toward Flat Rock.
80% highway — fuel and pacing are the main things to plan.
14 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 30.4 mi on I 65.
How Hard Is This Drive?
6/10
This is a straightforward highway drive that stays mostly on I 65 and Old State Road 252. You will hit about 11 points where you need to pay attention to lane position or signs. The trickiest moment comes around 0.1 miles in near Monument Circle.
Driving Effort6/10
Moderate - straightforward overall, but long enough or busy enough to require pacing
Balances navigation complexity with total wheel time.
This drive requires moderate attention. Across 38.2 miles you will encounter 11 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: at 0.1 miles (Monument Circle): Navigation decision point; at 0.8 miles (East Washington Street): Complex interchange - multiple decisions in a short stretch; at 1.2 miles: Highway fork - watch signs carefully. Multiple destination signs - pick the right one.
Elevation Profile
Mostly flat terrain
834 ft688 ft
Total Climb
160 ft
Total Descent
184 ft
Highest Point
834 ft
~10.9 mi in
Elevation Range
146 ft
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
On the drive from Indianapolis, IN to Flat Rock, IN, road signs begin pointing toward Edinburgh along the way.
Indianapolis is the capital of Indiana and also the state’s largest city. Efforts to beautify and modernize the city have brought Indianapolis into the 21st century as a world-class destination for everything from business meetings and trade conventions to backpackers making their way across the States.
Indianapolis is widely hailed as the "Racing Capital of the World" because of the Indianapolis Motor Speedway, home of the Indy 500 and Brickyard 400 at the Brickyard, and as the "Amateur Sports Capital of America" for hosting the NCAA Hall of Champions. The city has several attractions outside of sports, including museums, a large zoo, over 100 ethnic restaurants, several arts and historic districts, and a revitalized downtown. Although Indy has been mocked with the epithet "India-noplace", visitors will encounter a mix of a large metropolitan city and a simple Midwestern community.
Top landmarks
•The Children's Museum of Indianapolis — museum
•Indiana Statehouse — state capitol building of the U.S. state of Indiana
•Soldiers' and Sailors' Monument — monument in Indianapolis
Doable as a same-day drive at 50m. Total distance: 38.2 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
50m drive, comfortable solo distance.
EV Driver
0 DC fast chargers along the route. Coverage: unknown.
First-Time Driver
Mostly highway driving (80%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 30.4 miles on I 65. The full list of main roads is in the Roads section above.
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 Flat Rock, IN before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.
Yes. At under 2 hours behind the wheel, this works well for families — plan one quick stop if you have younger kids.
The main spots that need attention: at 0.1 miles (Monument Circle): Navigation decision point; at 0.8 miles (East Washington Street): Complex interchange - multiple decisions in a short stretch; at 1.2 miles: Highway fork - watch signs carefully. Multiple destination signs - pick the right one.
Yes. A round trip is manageable in a single day if you plan a break at Flat Rock, IN before heading back.
