Origin
St. Louis, MO
Night in St. Louis on Thursday
Local time
10:30 PM
CDT
Current temp
74°F
Unavailable
Live forecast
Trip from St. Louis, MO to Arnold, MO
Last recalculated Apr 17, 2026
Drive Time
26m
Distance
18.6 mi
30 km
Drive Score
6/10
Good drive
Same Day?
Yes, doable
Fuel Cost
$3
one way
EV Charging
Unknown
Best Time to Leave
4 AM
0h 24m
★
6 AM
0h 27m
8 AM
0h 31m
10 AM
0h 28m
12 PM
0h 28m
3 PM
0h 28m
5 PM
0h 31m
8 PM
0h 25m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Arnold, MO
Wikimedia Commons
Trip Overview
The drive from St. Louis, MO to Arnold, MO covers 18.6 miles and takes about 26m behind the wheel. This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on I 55, South Tucker Boulevard, Jeffco Boulevard for much of the mileage, and the overall profile is highway-focused drive. The longest uninterrupted segment is about 15.3 miles on I 55. At current regular gas prices, budget about $2.91 one way before food or hotel costs.
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 26m. Total distance: 18.6 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
26m drive, comfortable solo distance.
EV Driver
0 DC fast chargers along the route. Coverage: unknown.
First-Time Driver
Mostly highway driving (84%). Some complex stretches to watch for.
Drive Character
This is a 26m highway drive covering 18.6 miles, with most of the trip on I 55 and South Tucker Boulevard. The longest continuous stretch is about 15.3 miles on I 55.
Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 11 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
I 55 is the longest continuous segment at about 15.3 miles.
How Hard Is This Drive?
This is a straightforward highway drive that stays mostly on I 55 and South Tucker Boulevard. You will hit about 6 points where you need to pay attention to lane position or signs. The trickiest moment comes early in the drive near South Tucker Boulevard.
Driving Effort
6/10
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 18.6 miles you will encounter 6 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: near the start (South Tucker Boulevard): Lane positioning matters here; at 1.7 miles: Lane positioning matters here; at 17.1 miles: Exit ramp - move to the correct lane early. Lane positioning matters here.
Critical Maneuvers
5 of 6 key pointsThese are the spots where you need to pay the most attention. Preview them before you drive.
4
0 mi into trip
|
~0m in
|
South Tucker Boulevard
Turn left onto South Tucker Boulevard
Lane positioning matters here
Use the left lane.
7
1.7 mi into trip
|
~4m in
Take the ramp toward I 55 South: Memphis
Lane positioning matters here
Use the left lane.
Toward I 55 South: Memphis
7
17.1 mi into trip
|
~23m in
Take the exit toward MO 141: Arnold
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the slight right lane.
Exit 191
Toward MO 141: Arnold
8
17.3 mi into trip
|
~24m in
Keep slight left at fork toward MO 141 South: Arnold
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight left lane.
Toward MO 141 South: Arnold
4
17.4 mi into trip
|
~24m in
|
MO 141
Merge onto MO 141
Merge point - match speed before joining
Main Roads
| Road | Distance | Duration |
|---|---|---|
| I 55 | 15.3 mi | 18m |
| South Tucker Boulevard | 1.3 mi | 3m |
| Jeffco Boulevard | 0.9 mi | 1m |
| MO 141 | 0.3 mi | <1m |
| Gravois Avenue | 0.3 mi | <1m |
| Market Street | <0.1 mi | <1m |
Longest stretch:
I 55
— 15.3 mi, about 18m
Turn-by-Turn Driving Directions
Step-by-step road directions between St. Louis, MO and Arnold, MO.
1
Start on Market Street
86 ft
·
4 sec
·
Market Street
2
Turn left onto South Tucker Boulevard
1.3 mi
·
3 min
·
South Tucker Boulevard
Use the left lane.
3
Turn straight onto Gravois Avenue
0.3 mi
·
46 sec
·
Gravois Avenue
4
Take the ramp
0.1 mi
·
15 sec
Toward I 55 South: Memphis
Use the left lane.
5
Merge onto I 55
15 mi
·
18 min
·
I 55
6
Take the exit
0.2 mi
·
27 sec
Exit 191
Toward MO 141: Arnold
Use the slight right lane.
7
Keep slight left at fork
438 ft
·
12 sec
Toward MO 141 South: Arnold
Use the slight left lane.
8
Merge onto MO 141
0.2 mi
·
13 sec
·
MO 141
9
Continue on MO 141
0.2 mi
·
20 sec
·
MO 141
10
Turn right onto US 61; US 67
0.9 mi
·
1 min
·
Jeffco Boulevard
11
Arrive at destination
US 61; US 67
Fuel & Cost
Regular Gas
$2.91 one way
$5.82 round trip
$3.97/gal
25.4 MPG avg
7 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.36 | $3.19 | $6.39 |
| premium | $4.89 | $3.58 | $7.16 |
| diesel | $5.61 | $4.11 | $8.21 |
No toll roads detected on this route.
Drive Cost (one way)
Fuel
$3
Estimated CO2 emission: 6.5 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $2 in charging · 0 stops · 71% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 5.6 | 0 | $1.95 | $0.89 |
| Efficient EV | 4.7 | 0 | $1.63 | $0.74 |
| EV Truck/SUV | 7.4 | 0 | $2.60 | $1.19 |
Gas CO2
7 kg
EV CO2
2 kg (71% 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.
Destination
Arnold, MO
Night in Arnold on Thursday
Local time
10:30 PM
CDT
Current temp
57°F
Unavailable
Live forecast
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
17 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
26m on the road
Use the two city cards together: check the sky where you start, then compare it with the local time and temperature at arrival.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
Frequently Asked Questions
The drive from St. Louis, MO to Arnold, MO covers 18.6 miles and takes about 26m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are I 55, South Tucker Boulevard, Jeffco Boulevard. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 9.3 miles from St. Louis, MO. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $2.91 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
Leave by 9 AM and you'll arrive before lunch. Even a 4 PM departure gets you there before dark in summer.
This drive requires moderate attention. Across 18.6 miles you will encounter 6 spots where lane choice or exit timing matters. Not difficult for experienced highway drivers, but worth previewing the tricky sections before you go.
The main spots that need attention: near the start (South Tucker Boulevard): Lane positioning matters here; at 1.7 miles: Lane positioning matters here; at 17.1 miles: Exit ramp - move to the correct lane early. Lane positioning matters here.
The route from St. Louis, MO to Arnold, MO does not surface many named destination signs beyond the main corridor.
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