Is there a direct flight?

No, most flights from St. Louis to Indianapolis require a connection.

How long is the drive?

The drive is approximately 4 hours.

What is the time difference?

Indianapolis is one hour ahead of Troy.

Are there tolls on I-70?

No, I-70 is generally toll-free through Illinois and Indiana.

Is it better to fly or drive?

Driving is more cost-effective and often faster for this specific distance.

Troy

Indianapolis

Flight Driving

Troy to Indianapolis

Updated: 28 May 2026

Traveling from Troy to Indianapolis covers roughly 400 km across the Midwest. The most direct driving route involves taking I-70 East through Illinois and into Indiana. Alternatively, you can drive to St. Louis Lambert International Airport (STL) and fly to Indianapolis International Airport (IND). Driving offers flexibility for luggage, while flying saves significant time if you factor in airport transit. The route is largely flat, passing through major agricultural regions.

Total Distance: 400 km driving, 380 km air distance.

Fastest Way

Driving is often faster than flying when accounting for airport security and boarding times.

Cheapest Way

Driving is significantly cheaper, costing about 55 dollars in fuel compared to flight prices.

Compare Troy to Indianapolis Routes

	Flight Connecting	Driving Direct
Duration	3 hours (including transit)	4 hours
Avg Price	250-400 USD	50-60 USD
Operator	Southwest Airlines	Personal Vehicle
Route	STL to IND via Chicago or other hubs	I-70 East through Illinois
Tip	Direct flights are rare; check for connecting options via Southwest.	Expect heavy traffic near the downtown Indianapolis interchange.

Travel Tips

Time Zone
Remember that Indianapolis is in the Eastern Time Zone, one hour ahead of Troy.
Parking
Use parking apps to find affordable garages in downtown Indianapolis.
Tolls
Be prepared for potential tolls on Indiana toll roads if you deviate from I-70.
Dining
Stop in Effingham, Illinois, for a variety of mid-trip dining options.
Navigation
Download offline maps as cellular service can be spotty in rural Illinois.

Safety Tips

Speed Traps
Observe speed limits strictly in small towns along I-70.
Fatigue
Take breaks every two hours to maintain alertness on the long interstate stretch.
Weather
Monitor for sudden thunderstorms common in the Midwest during summer.
Vehicle Prep
Check your oil and coolant levels before starting this 400 km journey.