Origin
O'Fallon, MO
Late night in O'Fallon on Sunday
Local time
12:57 AM
CDT
Current temp
57°F
Unavailable
Live forecast
Trip from O'Fallon, MO to Berkeley, MO
Compiled and reviewed by the US Trip Planner planning team at COD Solutions Oy · Last reviewed Apr 19, 2026 · Editorial standards
Drive Time
32m
Distance
23.6 mi
38 km
Drive Score
6/10
Good drive
Same Day?
Yes, doable
Fuel Cost
$4
one way
EV Charging
Good
6 stations
Best Time to Leave
4 AM
0h 30m
★
6 AM
0h 33m
8 AM
0h 38m
10 AM
0h 35m
12 PM
0h 34m
3 PM
0h 35m
5 PM
0h 38m
8 PM
0h 31m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
O'Fallon, MO
Wikimedia Commons
Berkeley, MO
Valeria Boltneva
Trip Overview
O'Fallon, MO to Berkeley, MO is 23.6 miles and takes about 32 minutes via I 70, with a fuel budget near $4 and enough daylight to finish in a day. This is a short, straightforward drive primarily on major highways within the Midwest region. You'll be traveling between two locations within Missouri, making it a convenient option for a quick trip. Given its brief duration and highway focus, this route is best suited for those needing to get from point A to point B efficiently.
Main Roads
| Road | Distance | Duration |
|---|---|---|
| I 70 | 19.8 mi | 24m |
| Drennen Parkway | 0.9 mi | 1m |
| Inner Belt Expressway | 0.9 mi | 1m |
| South Main Street | 0.6 mi | 1m |
| Airport Road | 0.3 mi | <1m |
| Evergreen Boulevard | 0.3 mi | 1m |
Longest stretch:
I 70
— 19.8 mi, about 24m
Turn-by-Turn Driving Directions
Step-by-step road directions between O'Fallon, MO and Berkeley, 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
20 mi
·
24 min
·
I 70
Use the straight / slight right lanes.
6
Take the exit
0.5 mi
·
1 min
Exit 238B
Toward I 170 North
Use the slight left lane.
7
Merge onto I 170
0.9 mi
·
1 min
·
Inner Belt Expressway
8
Take the exit
0.2 mi
·
20 sec
Exit 9A
Toward Airport Road
Use the slight right lane.
9
Turn right onto Airport Road
0.3 mi
·
40 sec
·
Airport Road
10
Turn left onto Evergreen Boulevard
0.3 mi
·
1 min
·
Evergreen Boulevard
11
Arrive at destination
Evergreen Boulevard
Heads-up: tricky spots
5 of 85 decision points cluster between mile 0.6 and 22.8 — 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
5
1.6 mi into trip
|
~3m in
|
I 70
Merge onto I 70
Merge point - match speed before joining. Lane positioning matters here
Use the straight / slight right lanes.
7
21.4 mi into trip
|
~28m in
Take the exit toward I 170 North
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the slight left lane.
Exit 238B
Toward I 170 North
7
22.8 mi into trip
|
~30m in
Take the exit toward Airport Road
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the slight right lane.
Exit 9A
Toward Airport Road
Fuel & Cost
Regular Gas
$3.69 one way
$7.38 round trip
$3.97/gal
25.4 MPG avg
8 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.36 | $4.05 | $8.10 |
| premium | $4.89 | $4.54 | $9.08 |
| diesel | $5.61 | $5.21 | $10.42 |
No toll roads detected on this route.
Drive Cost (one way)
Fuel
$4
Estimated CO2 emission: 8.3 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $2 in charging · 0 stops · 63% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 7.1 | 0 | $2.48 | $1.13 |
| Efficient EV | 5.9 | 0 | $2.07 | $0.94 |
| EV Truck/SUV | 9.4 | 0 | $3.30 | $1.51 |
Gas CO2
8 kg
EV CO2
3 kg (63% 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
Berkeley, MO
Late night in Berkeley on Sunday
Local time
12:57 AM
CDT
Current temp
77°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
20 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
32m 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?
This drive is overwhelmingly highway-focused, with 91% of the journey taking place on major roads like I 70 and the Inner Belt Expressway. You'll experience a long, uninterrupted stretch of 19.8 miles on I 70, offering a consistent, high-speed experience. Expect a profile dominated by the efficiency of interstate travel, with minimal time spent on local or scenic byways. The route's character remains largely consistent, prioritizing direct travel over varied scenery.
91% 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: 19.8 mi on I 70.
How Hard Is This Drive?
6/10
This is a straightforward highway drive that stays mostly on I 70 and Drennen Parkway. You will hit about 8 points where you need to pay attention to lane position or signs. The trickiest moment comes around 0.6 miles in near Drennen Parkway.
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 23.6 miles you will encounter 8 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: at 0.6 miles (Drennen Parkway): Lane positioning matters here; at 1.5 miles: Lane positioning matters here; at 1.6 miles (I 70): Merge point - match speed before joining. Lane positioning matters here.
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 32m. Total distance: 23.6 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
32m drive, comfortable solo distance.
EV Driver
0 DC fast chargers along the route. Coverage: unknown.
First-Time Driver
Mostly highway driving (91%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 19.8 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 Berkeley, 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 1.6 miles (I 70): Merge point - match speed before joining. 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 Berkeley, 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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