How far is Washington County, MO from Saint Charles, MO?
The driving distance from Washington County, MO to Saint Charles, MO is about 84.3 miles (135.6 km), with a travel time of about 01h 40m by car.
- The straight-line flight distance is about 60.7 miles (97.7 km).
- For a round trip, plan for roughly 03h 21m 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 40m.
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.
City in Missouri, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Showers And Thunderstorms
Chance Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between Washington County and Saint Charles.
Turn-by-Turn Driving Directions
Step-by-step road directions between Washington County and Saint Charles.
-
1
Start on the route
2765 ft · 2 min
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2
Turn right
3.8 mi · 9 min
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3
Turn right
1.4 mi · 3 min
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4
Turn straight onto West High Street
1.5 mi · 2 min · West High Street
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5
Turn left
25.5 mi · 41 min
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6
Continue straight
3.8 mi · 5 min
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7
Turn left
1894 ft · 36 sec
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8
Continue on MO 21 North: Saint Louis
19.7 mi · 23 min
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9
Take the exit slight right toward MO 141: Arnold, Fenton
1384 ft · 24 sec
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10
Turn left
4 mi · 6 min
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11
Take the exit right toward MO 30 East: Saint Louis
1229 ft · 17 sec
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12
Merge slight left
2.5 mi · 4 min
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13
Take the exit left toward I 270 North
2202 ft · 35 sec
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14
Merge slight left
14.7 mi · 18 min
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15
Take the exit slight right toward I 70: Kansas City, Saint Louis, Saint Louis Lambert International Airport
1 mi · 1 min
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16
Keep slight left to continue on I 70 West: Kansas City
645 ft · 11 sec
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17
Continue on I 70 West: Kansas City
1 km · 57 sec
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18
Merge slight left
2.7 mi · 3 min
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19
Take the exit slight right toward I 70 Business: Fifth Street
841 ft · 18 sec
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20
Keep slight right to continue on I 70 Business: Fifth Street North, Bass Pro Drive, Ameristar Boulevard
71 m · 5 sec
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21
Turn slight right onto South Fifth Street
1.6 km · 2 min · South Fifth Street
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22
Turn right onto Jefferson Street
1093 ft · 44 sec · Jefferson Street
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23
Turn left onto North Second Street
949 ft · 34 sec · North Second Street
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24
Arrive at your destination
0 m · 1 sec · North Second Street
Car Route Details
A richer read on the saved driving route between Washington County and Saint Charles.
Turn-heavy local drive
The route has frequent decision points for its length, so lane choice and turn timing will matter more than cruising speed.
Longest stretch
Turn left
25.5 mi · 00h 41m
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 leaving Washington County and Chance Showers And Thunderstorms near Saint Charles.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Washington County to Saint Charles?
The road trip is about 84.3 miles (135.6 km) and usually takes 01h 40m 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?
Hillsboro is a useful midpoint, sitting about 42.4 miles from Washington County and 41.9 miles from Saint Charles.
How much longer is the road route than the straight-line distance?
The direct path is about 60.7 miles (97.7 km), while the road route adds roughly 23.6 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 3:08 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $11.81 one way or $23.61 round trip. Estimated CO2 is about 26.4 kg one way.
What should you check before leaving?
Before you leave, expect Showers And Thunderstorms around Washington County and Chance Showers And Thunderstorms near Saint Charles.
Stop Ideas Near Hillsboro
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Hillsboro.
Kirkwood
Washington
Gateway Transportation Center
Alton
Flight Path Map
This map shows the direct air route between Washington County and Saint Charles. Straight-line distance: 60.73 mi (97.74 km).
#1 Washington County
County in Missouri, United States
| Population | 24,604 |
| Coordinates | 37.9616800, -90.8774200 |
| Altitude | 292 |
| Country | United States |
#2 Saint Charles
A city in St.
| Population | 71,761 |
| Coordinates | 38.7839400, -90.4812300 |
| Altitude | 147 |
| Country | United States |
End: North Second Street (-90.481269, 38.783952)
Estimated Travel Time
Distance: 136 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 02h 48m |
| 40 mph (64.37 km/h) | 02h 06m |
| 50 mph (80.47 km/h) | 01h 41m |
| 60 mph (96.56 km/h) | 01h 24m |
| 70 mph (112.65 km/h) | 01h 12m |
| 80 mph (129 km/h) | 01h 03m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.98 | $11.81 | $23.61 |
| Mid-grade | $4.34 | $12.89 | $25.79 |
| Premium | $4.71 | $13.98 | $27.96 |
| Diesel | $5.99 | $17.78 | $35.57 |
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 · Oct 15, 2026