How far is St. Louis, MO from Troy, MO?
The driving distance from St. Louis, MO to Troy, MO is about 55.9 miles (89.9 km), with a travel time of about 01h 11m by car.
- The straight-line flight distance is about 48.7 miles (78.3 km).
- For a round trip, plan for roughly 02h 23m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM CDT.
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 01h 11m.
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.
Village in the United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Showers And Thunderstorms Likely
Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between St. Louis and Troy.
Turn-by-Turn Driving Directions
Step-by-step road directions between St. Louis and Troy.
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1
Start on Market Street
1.6 mi · 3 min · Market Street
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2
Take the ramp slight left toward I 64 West, US 40 West: Wentzville
1531 ft · 24 sec
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3
Merge slight left onto Jack Buck Memorial Highway
4.3 mi · 6 min · Jack Buck Memorial Highway
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4
Continue on Daniel Boone Expressway
5.7 mi · 7 min · Daniel Boone Expressway
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5
Continue on Avenue of the Saints
42.5 mi · 52 min · Avenue of the Saints
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6
Take the exit slight right toward MO 47: Troy, Winfield
933 ft · 23 sec
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7
Keep slight left to continue on MO 47 South: Troy
50 m · 7 sec
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8
Turn left
1499 ft · 52 sec
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9
Turn left onto North Lincoln Drive
1334 ft · 30 sec · North Lincoln Drive
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10
Turn right onto East Cherry Street
2220 ft · 44 sec · East Cherry Street
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11
Enter the roundabout and take exit 2 toward East Cherry Street
20 m · 2 sec · East Cherry Street
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12
Exit the roundabout onto East Cherry Street
1052 ft · 27 sec · East Cherry Street
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13
Turn left onto 2nd Street
30 m · 6 sec · 2nd Street
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14
Turn right
30 m · 7 sec
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15
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between St. Louis and Troy.
Interchange-aware route
The drive includes several ramps, exits, or merges, so checking the next few maneuvers before busy interchanges is useful.
Avenue of the Saints
Continue on Avenue of the Saints
42.5 mi · 00h 52m
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.
Showers And Thunderstorms Likely leaving St. Louis and Showers And Thunderstorms near Troy.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from St. Louis to Troy?
The road trip is about 55.9 miles (89.9 km) and usually takes 01h 11m 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?
Weldon Spring Heights is a useful midpoint, sitting about 27.9 miles from St. Louis and 28 miles from Troy.
How much longer is the road route than the straight-line distance?
The direct path is about 48.7 miles (78.3 km), while the road route adds roughly 7.2 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 CDT. If you want a more comfortable same-day return, try to leave by 4:06 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $7.43 one way or $14.86 round trip. Estimated CO2 is about 17.5 kg one way.
What should you check before leaving?
Before you leave, expect Showers And Thunderstorms Likely around St. Louis and Showers And Thunderstorms near Troy.
Stop Ideas Near Weldon Spring Heights
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
City Hall Park
City of O'Fallon
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Weldon Spring Heights.
Kirkwood
Washington
Gateway Transportation Center
Alton
Flight Path Map
This map shows the direct air route between St. Louis and Troy. Straight-line distance: 48.67 mi (78.33 km).
#1 St. Louis
The second most populous city in Missouri and the center of the St.
| Population | 315,685 |
| Coordinates | 38.6272700, -90.1978900 |
| Altitude | 142 |
| Country | United States |
#2 Troy
City in Lincoln County, Montana, USA
| Population | 13,341 |
| Coordinates | 38.9794900, -90.9807000 |
| Altitude | 165 |
| Country | United States |
End: Troy (-90.9807, 38.97949)
Estimated Travel Time
Distance: 90 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 51m |
| 40 mph (64.37 km/h) | 01h 23m |
| 50 mph (80.47 km/h) | 01h 07m |
| 60 mph (96.56 km/h) | 00h 55m |
| 70 mph (112.65 km/h) | 00h 47m |
| 80 mph (129 km/h) | 00h 41m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $7.43 | $14.86 |
| Mid-grade | $4.25 | $8.38 | $16.76 |
| Premium | $4.65 | $9.17 | $18.34 |
| Diesel | $5.30 | $10.45 | $20.90 |
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 Missouri · Apr 24, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.