Origin
Fenton, MO
Late night in Fenton on Sunday
Local time
12:59 AM
CDT
Current temp
80°F
Unavailable
Live forecast
Trip from Fenton, MO to St. Louis, MO
Compiled and reviewed by the US Trip Planner planning team at COD Solutions Oy · Last reviewed Apr 19, 2026 · Editorial standards
Drive Time
29m
Distance
19.7 mi
32 km
Drive Score
7/10
Good drive
Same Day?
Yes, doable
Fuel Cost
$3
one way
EV Charging
Unknown
Best Time to Leave
4 AM
0h 27m
★
6 AM
0h 29m
8 AM
0h 34m
10 AM
0h 31m
12 PM
0h 31m
3 PM
0h 31m
5 PM
0h 34m
8 PM
0h 28m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Fenton, MO
Wikimedia Commons
Trip Overview
This short, 19.7-mile drive from Fenton, MO, to St. Louis, MO, is easily manageable in about 29 minutes, making it perfect for a single-day trip. The route is predominantly highway-focused, with 77% of the journey on interstates, primarily I-55, I-270, and MO 30. Given its brevity and the estimated $3 fuel cost, this trip is a straightforward addition to any Midwest exploration. You won't need an overnight stay, allowing for a flexible schedule to explore either your starting point or final destination.
Main Roads
| Road | Distance | Duration |
|---|---|---|
| I 55 | 9.8 mi | 12m |
| I 270 | 2.8 mi | 3m |
| MO 30 | 2.4 mi | 3m |
| South Tucker Boulevard | 1.3 mi | 3m |
| Gravois Road | 0.3 mi | <1m |
| Gravois Avenue | 0.2 mi | <1m |
| Main Street | 0.2 mi | <1m |
| MO 141 | 0.1 mi | <1m |
Longest stretch:
I 55
— 9.8 mi, about 12m
Turn-by-Turn Driving Directions
Step-by-step road directions between Fenton, MO and St. Louis, MO.
1
Start on Main Street
0.2 mi
·
35 sec
·
Main Street
2
At end of road, turn right onto Gravois Road
0.3 mi
·
50 sec
·
Gravois Road
3
Turn right onto MO 141
0.1 mi
·
19 sec
·
MO 141
Use the right lane.
4
Take the exit
0.2 mi
·
17 sec
Toward MO 30 East: Saint Louis
5
Merge onto MO 30
2.4 mi
·
3 min
·
MO 30
Use the straight lane.
6
Take the exit
0.3 mi
·
20 sec
Toward I 270 South
7
Merge onto I 270
2.8 mi
·
3 min
·
I 270
8
Take the exit
0.4 mi
·
27 sec
Exit 1A
Toward I 55, US 61, US 67: Saint Louis, Memphis, Lemay Ferry Road
Use the straight / slight right lanes.
9
Keep slight left at fork
0.1 mi
·
7 sec
Toward I 55 North, US 61, US 67: Saint Louis
10
Continue on this road
0.2 mi
·
11 sec
·
this road
Exit 1A
Toward I 55 North, US 61, US 67: Saint Louis
11
Keep slight right at fork
0.7 mi
·
1 min
Exit 1A
Toward I 55 North: Saint Louis
Use the slight right lane.
12
Keep slight right at fork
0.5 mi
·
52 sec
Toward I 55 North: Saint Louis
Use the slight right lane.
13
Merge onto I 55
9.8 mi
·
12 min
·
I 55
Use the straight / slight right lanes.
14
Take the exit
0.2 mi
·
23 sec
Exit 207A
Toward MO 30 East: Gravois Avenue
Use the slight right lane.
15
Turn slight right onto Gravois Avenue
0.2 mi
·
27 sec
·
Gravois Avenue
16
Continue on South Tucker Boulevard
1.3 mi
·
3 min
·
South Tucker Boulevard
17
Turn right onto Market Street
86 ft
·
2 sec
·
Market Street
18
Arrive at destination
Market Street
Heads-up: tricky spots
5 of 145 decision points cluster between mile 0.6 and 17.9 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
6
0.6 mi into trip
|
~1m in
Take the exit toward MO 30 East: Saint Louis
Exit ramp - move to the correct lane early
Toward MO 30 East: Saint Louis
8
6.4 mi into trip
|
~9m in
Take the exit toward I 55, US 61, US 67: Saint Louis, Memphis, Lemay Ferry Road
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Exit 1A
Toward I 55, US 61, US 67: Saint Louis, Memphis...
8
7 mi into trip
|
~10m in
Keep slight right at fork toward I 55 North: Saint Louis
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight right lane.
Exit 1A
Toward I 55 North: Saint Louis
7
7.7 mi into trip
|
~11m in
Keep slight right at fork toward I 55 North: Saint Louis
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight right lane.
Toward I 55 North: Saint Louis
7
17.9 mi into trip
|
~24m in
Take the exit toward MO 30 East: Gravois Avenue
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the slight right lane.
Exit 207A
Toward MO 30 East: Gravois Avenue
Fuel & Cost
Regular Gas
$3.08 one way
$6.16 round trip
$3.97/gal
25.4 MPG avg
7 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.36 | $3.38 | $6.76 |
| premium | $4.89 | $3.79 | $7.58 |
| diesel | $5.61 | $4.35 | $8.70 |
No toll roads detected on this route.
Drive Cost (one way)
Fuel
$3
Estimated CO2 emission: 6.9 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 | 5.9 | 0 | $2.07 | $0.95 |
| Efficient EV | 4.9 | 0 | $1.72 | $0.79 |
| EV Truck/SUV | 7.9 | 0 | $2.76 | $1.26 |
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
St. Louis, MO
Late night in St. Louis on Sunday
Local time
12:59 AM
CDT
Current temp
74°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
6 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
29m 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?
Expect a highway-focused experience for most of this trip, with 77% of the drive utilizing major interstates. The longest uninterrupted stretch you'll encounter is 9.8 miles on I-55, offering a consistent pace. The roads are designed for efficient travel, and you'll find the drive to be direct and functional as you transition from Fenton to St. Louis. This isn't a winding scenic byway, but rather a practical connection between two points in Missouri.
77% highway — fuel and pacing are the main things to plan.
18 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 9.8 mi on I 55.
How Hard Is This Drive?
10/10
This is a straightforward highway drive that stays mostly on I 55 and I 270. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 0.6 miles in.
Driving Effort
10/10
Focused - lots of decisions in a short distance, but it is over quickly
Balances navigation complexity with total wheel time.
This is a short but busy drive. With 14 decision points packed into just 19.7 miles, you will need to pay attention to lane changes and exits — but the whole thing is over in 29m.
Where does it get tricky?
The main spots that need attention: at 0.6 miles: Exit ramp - move to the correct lane early; at 6.4 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 7 miles: Highway fork - watch signs carefully. Lane positioning matters here.
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
On the drive from Fenton, MO to St. Louis, MO, road signs begin pointing toward Memphis along the way.
Memphis
6.4 mi in
|
~9m
About the Cities
Arriving 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 29m. Total distance: 19.7 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
29m drive, comfortable solo distance.
EV Driver
0 DC fast chargers along the route. Coverage: unknown.
First-Time Driver
Mostly highway driving (77%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 9.8 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 St. Louis, 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: at 0.6 miles: Exit ramp - move to the correct lane early; at 6.4 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 7 miles: Highway fork - watch signs carefully. Lane positioning matters here.
Yes. A round trip is manageable in a single day if you plan a break at St. Louis, 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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