Florissant, MO to Oak Grove, MO is 213 miles and takes about 4 hours 6 minutes via I 70, with a fuel budget near $33 and enough daylight to finish in a day. This trip stays within the Midwest, specifically Missouri, for its entirety. Given its mostly highway profile and manageable duration, this route is ideal for a single-day drive. You'll spend most of your time on the interstate, making it a straightforward transit between these two points. Plan for a quick and efficient trip across the state.
Trip Pace
Same-day drive is realistic
A same-day return is possible, but it will make for a full day on the road.
Break Rhythm
1 planned break
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
106.5 miles from Florissant, MO
A natural place for your longest stop of the day
, about 2h 4m into the drive
.
Main Roads
Road
Distance
Duration
I 70
203.9 mi
3h 51m
Rosemary Straub Davison Highway
3.7 mi
4m
Lindbergh Boulevard
1.7 mi
3m
Washington Street
1 mi
1m
North Broadway Street
0.8 mi
1m
North New Florissant Road
<0.1 mi
<1m
South Broadway Street
—
—
Some road-level metrics are being recalculated.
Longest stretch:
I 70
— 203.9 mi, about 3h 51m
Traffic on I-70
Hour-of-day weekday pattern from 21 FHWA count stations on your route.
Peak
4 PM
~3,737 veh/hr typical
· worst 4,325
Quietest
2 AM
~347 veh/hr
Peak-to-quiet ratio
10.8×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 52 weeks of 2023 FHWA Travel Monitoring Analysis System data. Weekday hours only (Mon–Fri).
Turn-by-Turn Driving Directions
Step-by-step road directions between Florissant, MO and Oak Grove, MO.
1
Start on North New Florissant Road
87 ft·5 sec·North New Florissant Road
2
Turn right onto Washington Street
1.0 mi·1 min·Washington Street
3
Turn left onto US 67
1.7 mi·3 min·Lindbergh Boulevard
4
Take the ramp
0.4 mi·46 sec
Use the right lane.
5
Merge onto I 270
3.7 mi·4 min·Rosemary Straub Davison Highway
Use the straight / slight right lanes.
6
Take the exit
0.3 mi·25 sec
Exit 20AToward I 70: Saint Louis, Kansas City
7
Continue on this road
0.5 mi·42 sec·this road
Exit 20A-BToward I 70: Saint Louis, Kansas CityUse the slight left / slight right lanes.
8
Keep slight right at fork
0.5 mi·41 sec
Exit 20BToward I 70 West: Kansas CityUse the slight right lane.
9
Merge onto I 70
204 mi·3 hr 51 min·I 70
Use the straight / slight right lanes.
10
Take the exit
0.2 mi·22 sec
Exit 28Toward MO F, MO H: Oak Grove, Levasy
11
Keep slight left at fork
167 ft·4 sec
Exit 28Toward MO F, MO H: Oak Grove, Levasy
12
Turn straight onto MO F; MO H
0.8 mi·1 min·North Broadway Street
13
Arrive at destination
MO F
Trip Plan
For this 4-hour drive, departing in the morning is recommended to maximize daylight and allow for any unexpected delays. With only one recommended stop and a short duration, you have flexibility in how you pace yourself. The majority of your travel will be on I 70, so keep an eye on your fuel gauge, as services can sometimes be spaced out on longer interstate stretches. The estimated fuel cost is around $33, so budget accordingly for your fill-ups before hitting the road.
Morning Departure
An early start around 7-8 AM gets you there with plenty of daylight left.
Evening Departure
A late afternoon start means arriving after dark. Morning is better.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 106.5 miles from Florissant, MO, or about 2h 4m into the drive.
The longest continuous stretch on this route runs about 203.9 miles.
This is a comfortable same-day trip.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 47 miles or 56m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 106.5 miles or 2h 4m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 3h 22m
Traffic, exits, and arrival timing usually matter more near Oak Grove, MO than in the middle of the route.
Before You Leave
+
Open the route before leaving Florissant, MO so your first major turns are already loaded.
+
Leave with enough water and a charging cable within reach, not packed away.
+
Check your fuel range against the first long segment, especially if you are starting outside city service areas.
Day 1
Settle into the route from Florissant, MO
This is one driving day of about 213 miles and 4h 6m.
Your first comfortable stop window is around 47 miles from Florissant, MO.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 1 real break rather than only quick fuel stops.
The longest stretch is on I 70 for about 203.9 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Place data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 9
5 decision points cluster between mile 3.1 and 212.2 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
5
3.1 mi into trip|~6m in|I 270 / Rosemary Straub Davison Highway
Merge onto I 270 / Rosemary Straub Davison Highway
Merge point - match speed before joining. Lane positioning matters here
Use the straight / slight right lanes.
6
6.9 mi into trip|~10m in
Take the exit toward I 70: Saint Louis, Kansas City
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Exit 20A
Toward I 70: Saint Louis, Kansas City
8
7.6 mi into trip|~12m in
Keep slight right at fork toward I 70 West: Kansas City
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight right lane.
Exit 20B
Toward I 70 West: Kansas City
6
212 mi into trip|~4h 4m in
Take the exit toward MO F, MO H: Oak Grove, Levasy
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Exit 28
Toward MO F, MO H: Oak Grove, Levasy
8
212.2 mi into trip|~4h 4m in
Keep slight left at fork toward MO F, MO H: Oak Grove, Levasy
Highway fork - watch signs carefully. Multiple destination signs - pick the right one
Exit 28
Toward MO F, MO H: Oak Grove, Levasy
Fuel & Cost
Regular Gas
$31.46 one way
$62.91 round trip
$3.75/gal25.4 MPG avg75 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.14
$34.73
$69.45
premium
$4.72
$39.55
$79.10
diesel
$4.80
$40.22
$80.44
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$31
Meals
$25–$50
Total
$56–$81
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 74.5 kg one way.
Prices: EIA weekly data, 2026-07-13.
Driving Electric?
About $22 in charging
· 0 stops
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
63.9
0
$22.37
$10.22
Efficient EV
53.3
0
$18.64
$8.52
EV Truck/SUV
85.2
1
$29.82
$13.63
Gas CO2
75 kg
EV CO2
25 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.
Forecast as of Jul 18, 2026
Origin
Florissant, MO
Late night
in Florissant on Sunday
Local time
5:59 AM
CDT
Current temp
76°F
Slight Chance Showers And Thunderstorms
W 2 to 9 mph19% chanceLive forecast
Heat Advisory
Heat Advisory issued July 18 at 3:26PM CDT until July 18 at 7:00PM CDT by NWS Quad Cities IA IL
Heat Advisory
Heat Advisory issued July 18 at 12:07PM CDT until July 18 at 8:00PM CDT by NWS Memphis TN
Destination
Oak Grove, MO
Late night
in Oak Grove on Sunday
Local time
5:59 AM
CDT
Current temp
73°F
Slight Chance Showers And Thunderstorms
SSW 5 mph16% chanceLive forecast
Heat Advisory
Heat Advisory issued July 18 at 3:26PM CDT until July 18 at 7:00PM CDT by NWS Quad Cities IA IL
Heat Advisory
Heat Advisory issued July 18 at 12:07PM CDT until July 18 at 8:00PM CDT by NWS Memphis TN
87°F
Centralia, MO
107 mi in
Seasonal Notes
Summer travel usually means heavier construction, hotter rest stops, and busier weekend traffic around major cities.
Winter travel shortens daylight, so a route that looks manageable on paper can feel much longer after dark.
Holiday weekends tend to make both departure and arrival windows slower than the raw route time suggests.
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
3 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
4h 6m on the road
An early start around 7-8 AM gets you there with plenty of daylight left.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
National Parks Near This Route
Worth a detour if your schedule allows.
Gateway Arch National Park
National Park
Gateway Arch National Park commemorates President Jefferson’s vision of a continental nation, the individuals and cultural groups who helped shape its history, St. Louis’ role in westward expansion, a...
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
This drive is overwhelmingly on the interstate, with a 96% highway share. You'll be on I 70 for a significant stretch of 203.9 miles, indicating a long period of consistent cruising. Expect a dense pattern of exits and merges as you traverse populated areas along I 70. Only the final few miles will transition away from the interstate onto surface roads.
96% highway — fuel and pacing are the main things to plan.
13 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 203.9 mi on I 70.
How Hard Is This Drive?
6/10
This is a straightforward highway drive that stays mostly on I 70 and Rosemary Straub Davison Highway. You will hit about 9 points where you need to pay attention to lane position or signs. The trickiest moment comes around 3.1 miles in near I 270 / Rosemary Straub Davison Highway.
Driving Effort6/10
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 213 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: at 3.1 miles (I 270 / Rosemary Straub Davison Highway): Merge point - match speed before joining. Lane positioning matters here; at 6.9 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 7.6 miles: Highway fork - watch signs carefully. Lane positioning matters here.
Doable as a same-day drive at 4h 6m. Total distance: 213 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
4h 6m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (96%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 203.9 miles on I 70. The full list of main roads is in the Roads section above.
Yes — we found about 32 rest areas or service plazas within a short detour of the route (from OpenStreetMap). See the Rest Stops tab under Nearby Places for locations and mile markers. Plan to stretch, use the bathroom, and top off fluids every 2–3 hours on longer drives.
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 Oak Grove, MO before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.
Only with planning. This is a long drive for kids — consider splitting it into two days rather than pushing through. Plan at least 1 meaningful breaks. There are 32 rest areas along the route for bathroom stops.
The main spots that need attention: at 3.1 miles (I 270 / Rosemary Straub Davison Highway): Merge point - match speed before joining. Lane positioning matters here; at 6.9 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 7.6 miles: Highway fork - watch signs carefully. Lane positioning matters here.
Yes — Gateway Arch National Park. See the National Parks section for detour distances and tips on detours.
Possible but tiring. At 4.1 hours each way, an in-and-out day trip would put you behind the wheel for 8.2 hours — manageable with a long break at Oak Grove, MO, but most travelers stay overnight.
