Origin
St. Louis, MO
Late night in St. Louis on Sunday
Local time
12:59 AM
CDT
Current temp
74°F
Unavailable
Live forecast
Trip from St. Louis, MO to Affton, MO
Compiled and reviewed by the US Trip Planner planning team at COD Solutions Oy · Last reviewed Apr 19, 2026 · Editorial standards
Drive Time
19m
Distance
10.9 mi
18 km
Drive Score
8/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$2
one way
EV Charging
Unknown
Best Time to Leave
4 AM
0h 18m
★
6 AM
0h 19m
8 AM
0h 23m
10 AM
0h 20m
12 PM
0h 20m
3 PM
0h 21m
5 PM
0h 22m
8 PM
0h 18m
★
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Affton, MO
Wikimedia Commons
Trip Overview
This quick 10.9-mile drive from St. Louis, MO to Affton, MO is easily manageable as a single-day trip, taking just about 19 minutes. With a fuel cost estimated at $2, it's an economical option for a short journey within the Midwest. The route primarily utilizes I-55, South Tucker Boulevard, and Weber Road, offering a mixed driving experience. Given its brevity, you won't need an overnight stay, allowing for maximum flexibility in your schedule. It's a straightforward connection between two points in Missouri, perfect for a quick errand or a short hop.
Main Roads
| Road | Distance | Duration |
|---|---|---|
| I 55 | 6.4 mi | 8m |
| South Tucker Boulevard | 1.3 mi | 3m |
| Weber Road | 1.3 mi | 2m |
| Gravois Road | 1 mi | 2m |
| Gravois Avenue | 0.3 mi | <1m |
| Bayless Avenue | 0.2 mi | <1m |
| Tesson Ferry Road | <0.1 mi | <1m |
| Market Street | <0.1 mi | <1m |
Longest stretch:
I 55
— 6.4 mi, about 8m
Turn-by-Turn Driving Directions
Step-by-step road directions between St. Louis, MO and Affton, 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
6.4 mi
·
8 min
·
I 55
6
Take the exit
0.1 mi
·
18 sec
Exit 201A
Toward Bayless Avenue
Use the slight right lane.
7
Keep slight right at fork
178 ft
·
5 sec
Toward Bayless Avenue
Use the slight right lane.
8
Turn straight onto Bayless Avenue
0.2 mi
·
22 sec
·
Bayless Avenue
9
Continue on Weber Road
1.3 mi
·
2 min
·
Weber Road
10
Turn left onto MO 30
1.0 mi
·
2 min
·
Gravois Road
11
Turn left onto MO 21
237 ft
·
14 sec
·
Tesson Ferry Road
Use the left lane.
12
Turn right
228 ft
·
16 sec
13
Turn slight right
65 ft
·
4 sec
14
Turn right
87 ft
·
6 sec
15
Arrive at destination
Heads-up: tricky spots
5 of 95 decision points cluster between mile 0 and 10.8 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
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
8.2 mi into trip
|
~12m in
Take the exit toward Bayless Avenue
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the slight right lane.
Exit 201A
Toward Bayless Avenue
8
8.3 mi into trip
|
~12m in
Keep slight right at fork toward Bayless Avenue
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight right lane.
Toward Bayless Avenue
5
10.8 mi into trip
|
~18m in
Turn right
Navigation decision point
Fuel & Cost
Regular Gas
$1.70 one way
$3.41 round trip
$3.97/gal
25.4 MPG avg
4 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.36 | $1.87 | $3.74 |
| premium | $4.89 | $2.10 | $4.20 |
| diesel | $5.61 | $2.41 | $4.81 |
No toll roads detected on this route.
Drive Cost (one way)
Fuel
$2
Estimated CO2 emission: 3.8 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $1 in charging · 0 stops · 75% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 3.3 | 0 | $1.14 | $0.52 |
| Efficient EV | 2.7 | 0 | $0.95 | $0.44 |
| EV Truck/SUV | 4.4 | 0 | $1.53 | $0.70 |
Gas CO2
4 kg
EV CO2
1 kg (75% 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
Affton, MO
Late night in Affton on Sunday
Local time
12:59 AM
CDT
Current temp
63°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
11 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
19m 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.
What kind of drive is this?
The character of this drive is a mix, with 59% of the journey on highways. You'll experience a longest stretch of 6.4 miles on I-55, which provides a consistent, faster-paced segment. As you transition off the interstate and onto local roads like South Tucker Boulevard and Weber Road, expect a change in pace and traffic patterns. This change from efficient highway driving to more localized streets defines the drive's personality, making it a blend of steady cruising and neighborhood navigation.
59% highway, the rest on surface roads — varied driving throughout.
15 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 6.4 mi on I 55.
How Hard Is This Drive?
6/10
This route mixes highway mileage with some local-road sections near the start or finish. You will hit about 9 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 10.9 miles you will encounter 9 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 8.2 miles: Exit ramp - move to the correct lane early. Lane positioning matters here.
About the Cities
Starting in St. Louis, MO
Full guide →The Gateway City of St. Louis is the epitome of the modern Midwestern metropolis. Missouri's second-largest city is vibrant but laid-back, populous but navigable, historic but still relevant. The city's planners have created an aesthetically beautiful city, with plenty of green space amidst buildings both old and new, framed by the majestic Mississippi and Missouri rivers. And capping it all is the world's tallest man-made monument, the beautiful and iconic Gateway Arch. St. Louis is a city of culture and surprisingly inexpensive. Among American cities, only Washington, D.C. has more free attractions for tourists and residents alike. Hotels, restaurants, and even parking garages avoid the premium pricing common in other big cities. Although often overlooked, St. Louis can be an affordable, educational, and fun family getaway.
City content from Wikivoyage (CC BY-SA 4.0) and Wikidata (CC0).
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 19m. Total distance: 10.9 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
19m drive, comfortable solo distance.
EV Driver
0 DC fast chargers along the route. Coverage: unknown.
First-Time Driver
Mostly highway driving (59%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 6.4 miles on I 55. The full list of main roads is in the Roads section above.
It helps. This route has a higher-than-average number of complex decision points, which get harder in the dark. If the last hour of the trip is on surface roads or mountain grades, aim to arrive at Affton, MO before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.
Yes. At under 2 hours behind the wheel, this works well for families — plan one quick stop if you have younger kids.
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 8.2 miles: Exit ramp - move to the correct lane early. Lane positioning matters here.
Yes. A round trip is manageable in a single day if you plan a break at Affton, MO before heading back.
How this page is built
Compiled by the US Trip Planner planning team at COD Solutions Oy from open government datasets — OSRM over OpenStreetMap for geometry, and EIA for fuel prices. See our methodology for refresh cadence and limitations.
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