Origin
O'Fallon, MO
Late night in O'Fallon on Sunday
Local time
2:29 AM
CDT
Current temp
57°F
Unavailable
Live forecast
Trip from O'Fallon, MO to Jennings, MO
Compiled and reviewed by the US Trip Planner planning team at COD Solutions Oy · Last reviewed Apr 19, 2026 · Editorial standards
Drive Time
36m
Distance
26.9 mi
43 km
Drive Score
5/10
Practical drive
Same Day?
Yes, doable
Fuel Cost
$4
one way
EV Charging
Unknown
Best Time to Leave
4 AM
0h 34m
★
6 AM
0h 37m
8 AM
0h 43m
10 AM
0h 39m
12 PM
0h 39m
3 PM
0h 39m
5 PM
0h 43m
8 PM
0h 35m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
O'Fallon, MO
Wikimedia Commons
Jennings, MO
Mikhail Nilov
Trip Overview
This straightforward 26.9-mile drive from O'Fallon, MO to Jennings, MO is easily manageable in about 36 minutes, making it a perfect day trip. The route is primarily highway-focused, with 90% of the journey utilizing major roads like I-70. With a modest fuel cost estimated at $4, this is a budget-friendly excursion. You'll be staying within the Midwest region for the entirety of this short hop. Given its brevity, no overnight split is necessary, offering flexibility in your departure and arrival times.
Main Roads
| Road | Distance | Duration |
|---|---|---|
| I 70 | 23.5 mi | 29m |
| Jennings Station Road | 1.3 mi | 2m |
| Drennen Parkway | 0.9 mi | 1m |
| South Main Street | 0.6 mi | 1m |
Longest stretch:
I 70
— 23.5 mi, about 29m
Turn-by-Turn Driving Directions
Step-by-step road directions between O'Fallon, MO and Jennings, MO.
1
Start on this road
25 ft
·
7 sec
·
this road
2
Turn left onto South Main Street
0.6 mi
·
1 min
·
South Main Street
3
Turn left onto Drennen Parkway
0.9 mi
·
1 min
·
Drennen Parkway
Use the left lane.
4
Take the ramp
438 ft
·
6 sec
Toward I 70 East: Saint Louis
Use the slight left lane.
5
Merge onto I 70
22 mi
·
27 min
·
I 70
Use the straight / slight right lanes.
6
Take the exit
0.3 mi
·
24 sec
Exit 241A
Toward Bermuda Road
Use the slight right lane.
7
Keep slight left at fork
0.2 mi
·
12 sec
Toward I 70 East: Saint Louis
Use the slight left lane.
8
Merge onto I 70
1.7 mi
·
2 min
·
I 70
9
Take the exit
0.2 mi
·
39 sec
Exit 242
Toward Jennings Station Road, Goodfellow Boulevard
Use the slight right lane.
10
Turn left onto Jennings Station Road
1.3 mi
·
2 min
·
Jennings Station Road
11
Arrive at destination
Jennings Station Road
Heads-up: tricky spots
5 of 95 decision points cluster between mile 0.6 and 25.5 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
5
0.6 mi into trip
|
~1m in
|
Drennen Parkway
Turn left onto Drennen Parkway
Lane positioning matters here
Use the left lane.
5
1.5 mi into trip
|
~3m in
Take the ramp toward I 70 East: Saint Louis
Lane positioning matters here
Use the slight left lane.
Toward I 70 East: Saint Louis
7
23.3 mi into trip
|
~30m in
Take the exit toward Bermuda Road
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the slight right lane.
Exit 241A
Toward Bermuda Road
8
23.6 mi into trip
|
~31m in
Keep slight left at fork toward I 70 East: Saint Louis
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight left lane.
Toward I 70 East: Saint Louis
8
25.5 mi into trip
|
~33m in
Take the exit toward Jennings Station Road, Goodfellow Boulevard
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Exit 242
Toward Jennings Station Road, Goodfellow Boulev...
Fuel & Cost
Regular Gas
$4.21 one way
$8.41 round trip
$3.97/gal
25.4 MPG avg
9 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.36 | $4.62 | $9.23 |
| premium | $4.89 | $5.18 | $10.35 |
| diesel | $5.61 | $5.94 | $11.88 |
No toll roads detected on this route.
Drive Cost (one way)
Fuel
$4
Estimated CO2 emission: 9.4 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $3 in charging · 0 stops · 67% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 8.1 | 0 | $2.82 | $1.29 |
| Efficient EV | 6.7 | 0 | $2.35 | $1.08 |
| EV Truck/SUV | 10.8 | 0 | $3.77 | $1.72 |
Gas CO2
9 kg
EV CO2
3 kg (67% 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
Jennings, MO
Late night in Jennings on Sunday
Local time
2:29 AM
CDT
Current temp
83°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
26 degrees warmer at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
36m 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 the bulk of this trip, with 90% of the drive on major roads. The longest continuous stretch you'll encounter is 23.5 miles on I-70, offering a consistent pace. You'll transition from I-70 to Jennings Station Road and Drennen Parkway as you approach your destination. This route is characterized by its efficiency, prioritizing getting you from point A to point B quickly rather than offering winding scenic byways.
90% highway — fuel and pacing are the main things to plan.
11 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 23.5 mi on I 70.
How Hard Is This Drive?
8/10
This is a straightforward highway drive that stays mostly on I 70 and Jennings Station Road. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 0.6 miles in near Drennen Parkway.
Driving Effort
8/10
Focused - busy navigation packed into a short drive
Balances navigation complexity with total wheel time.
This is a short but busy drive. With 9 decision points packed into just 26.9 miles, you will need to pay attention to lane changes and exits — but the whole thing is over in 36m.
Where does it get tricky?
The main spots that need attention: at 0.6 miles (Drennen Parkway): Lane positioning matters here; at 1.5 miles: Lane positioning matters here; at 23.3 miles: Exit ramp - move to the correct lane early. Lane positioning matters here.
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 36m. Total distance: 26.9 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
36m drive, comfortable solo distance.
EV Driver
0 DC fast chargers along the route. Coverage: unknown.
First-Time Driver
Mostly highway driving (90%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 23.5 miles on I 70. 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 Jennings, 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 (Drennen Parkway): Lane positioning matters here; at 1.5 miles: Lane positioning matters here; at 23.3 miles: Exit ramp - move to the correct lane early. Lane positioning matters here.
Yes — Gateway Arch National Park. See the National Parks section for detour distances and tips on detours.
Yes. A round trip is manageable in a single day if you plan a break at Jennings, 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, EIA for fuel prices, and NPS for national parks. See our methodology for refresh cadence and limitations.
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