How far is Union, MO from Saint Charles, MO?
The driving distance from Union, MO to Saint Charles, MO is about 54.6 miles (87.8 km), with a travel time of about 00h 58m by car.
- The straight-line flight distance is about 36.7 miles (59 km).
- For a round trip, plan for roughly 01h 56m 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 00h 58m.
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.
Human settlement in Jefferson County, Missouri, United States of America
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Union and Saint Charles.
Turn-by-Turn Driving Directions
Step-by-step road directions between Union and Saint Charles.
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1
Start on the route
19 m · 7 sec
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2
Turn right onto East Park Avenue
900 ft · 26 sec · East Park Avenue
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3
Turn right onto North Church Street
1601 ft · 1 min · North Church Street
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4
Turn left onto East Main Street
2119 ft · 1 min · East Main Street
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5
Turn right
157 m · 12 sec
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6
At the end of the road, turn left
2.4 mi · 4 min
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7
Merge slight left
2.5 mi · 3 min
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8
Keep slight left to continue on I 44 East, US 50 East: Saint Louis
28.9 mi · 33 min
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9
Take the exit slight right toward I 270: Chicago, Memphis
871 ft · 19 sec
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10
Keep slight left to continue on I 270 North: Chicago
551 ft · 12 sec
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11
Continue on I 270 North: Chicago
2638 ft · 53 sec
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12
Merge slight left
12.6 mi · 16 min
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13
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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14
Keep slight left to continue on I 70 West: Kansas City
645 ft · 11 sec
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15
Continue on I 70 West: Kansas City
1 km · 57 sec
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16
Merge slight left
2.7 mi · 3 min
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17
Take the exit slight right toward I 70 Business: Fifth Street
841 ft · 18 sec
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18
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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19
Turn slight right onto South Fifth Street
1.6 km · 2 min · South Fifth Street
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20
Turn right onto Jefferson Street
1093 ft · 44 sec · Jefferson Street
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21
Turn left onto North Second Street
949 ft · 34 sec · North Second Street
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22
Arrive at your destination
0 m · 1 sec · North Second Street
Car Route Details
A richer read on the saved driving route between Union and Saint Charles.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
I 44 East
Keep slight left to continue on I 44 East, US 50 East: Saint Louis
28.9 mi · 00h 33m
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.
Mostly Sunny leaving Union and Mostly Sunny near Saint Charles.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Union to Saint Charles?
The road trip is about 54.6 miles (87.8 km) and usually takes 00h 58m 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?
Parkdale is a useful midpoint, sitting about 27.1 miles from Union and 27.5 miles from Saint Charles.
How much longer is the road route than the straight-line distance?
The direct path is about 36.7 miles (59 km), while the road route adds roughly 17.9 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 4:34 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $7.24 one way or $14.48 round trip. Estimated CO2 is about 17.1 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Union and Mostly Sunny near Saint Charles.
Stop Ideas Near Parkdale
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 Parkdale.
Kirkwood
Gateway Transportation Center
Washington
Alton
Flight Path Map
This map shows the direct air route between Union and Saint Charles. Straight-line distance: 36.64 mi (58.96 km).
#1 Union
City in and county seat of Franklin County, Missouri, United States
| Population | 12,094 |
| Coordinates | 38.4500500, -91.0084800 |
| Altitude | 162 |
| 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: 88 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 49m |
| 40 mph (64.37 km/h) | 01h 21m |
| 50 mph (80.47 km/h) | 01h 05m |
| 60 mph (96.56 km/h) | 00h 54m |
| 70 mph (112.65 km/h) | 00h 46m |
| 80 mph (129 km/h) | 00h 40m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $7.24 | $14.48 |
| Mid-grade | $4.25 | $8.17 | $16.33 |
| Premium | $4.65 | $8.94 | $17.87 |
| Diesel | $5.30 | $10.18 | $20.37 |
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 23, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.