Origin
Florissant, MO
Night in Florissant on Thursday
Local time
9:56 PM
CDT
Current temp
58°F
Unavailable
Live forecast
Trip from Florissant, MO to Washington County, MO
Last recalculated Apr 17, 2026
Drive Time
2h 9m
Distance
87.9 mi
141 km
Drive Score
9/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$14
one way
EV Charging
Unknown
Best Time to Leave
4 AM
2h 0m
★
6 AM
2h 9m
8 AM
2h 28m
10 AM
2h 16m
12 PM
2h 14m
3 PM
2h 17m
5 PM
2h 27m
8 PM
2h 4m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Florissant, MO
Wikimedia Commons
Washington County, MO
Townsend Walton
Trip Overview
The drive from Florissant, MO to Washington County, MO covers 87.9 miles and takes about 2h 9m behind the wheel. This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on MO 21, Rosemary Straub Davison Highway, Veterans Memorial Highway for much of the mileage, and the overall profile is mixed drive. The longest uninterrupted segment is about 29.7 miles on MO 21. At current regular gas prices, budget about $13.74 one way before food or hotel costs.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Midpoint
43.9 miles from Florissant, MO
A natural place for your longest stop of the day , about 57m into the drive .
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 2h 9m. Total distance: 87.9 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
2h 9m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (43%). Some complex stretches to watch for.
Drive Character
The drive from Florissant, MO to Washington County, MO covers 87.9 miles and takes about 2h 9m, using a mix of highways and local roads.
Expect a mix of faster highway mileage and slower local approaches near the beginning or end.
There are about 19 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
MO 21 is the longest continuous segment at about 29.7 miles.
How Hard Is This Drive?
This route mixes highway mileage with some local-road sections near the start or finish. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes early in the drive near Washington Street.
Driving Effort
8/10
Demanding - plan breaks and stay ahead of the key maneuvers
Balances navigation complexity with total wheel time.
This is a demanding drive. With 14 significant decision points across 87.9 miles, you will need to stay alert - especially through interchange areas and urban stretches. Consider splitting it into segments if you are not comfortable with fast highway navigation.
Where does it get tricky?
The main spots that need attention: near the start (Washington Street): Navigation decision point; at 3.1 miles (I 270 / Rosemary Straub Davison Highway): Merge point - match speed before joining. Lane positioning matters here; at 23.9 miles: Exit ramp - move to the correct lane early. Lane positioning matters here.
Critical Maneuvers
5 of 14 key pointsThese are the spots where you need to pay the most attention. Preview them before you drive.
4
0 mi into trip
|
~0m in
|
Washington Street
Turn right onto Washington Street
Navigation decision point
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.
7
23.9 mi into trip
|
~32m in
Take the exit toward MO 30: Gravois Road
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the slight right lane.
Exit 3
Toward MO 30: Gravois Road
8
24.2 mi into trip
|
~32m in
Keep slight right at fork toward MO 30 West: Fenton
Highway fork - watch signs carefully. Lane positioning matters here
Use the right lane.
Toward MO 30 West: Fenton
7
26.7 mi into trip
|
~36m in
Take the exit toward MO 141: Fenton, Valley Park
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the right lane.
Toward MO 141: Fenton, Valley Park
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 Florissant, MO to Washington County, MO, road signs begin pointing toward Valley Park along the way.
Valley Park
26.7 mi in
|
~36m
Main Roads
| Road | Distance | Duration |
|---|---|---|
| MO 21 | 29.7 mi | 47m |
| Rosemary Straub Davison Highway | 20.8 mi | 26m |
| Veterans Memorial Highway | 19.8 mi | 23m |
| MO 141 | 4 mi | 5m |
| MO AA | 3.8 mi | 9m |
| MO 30 | 2.4 mi | 3m |
| Lindbergh Boulevard | 1.7 mi | 3m |
| East High Street | 1.5 mi | 2m |
Longest stretch:
MO 21
— 29.7 mi, about 47m
Turn-by-Turn Driving Directions
Step-by-step road directions between Florissant, MO and Washington County, 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
21 mi
·
26 min
·
Rosemary Straub Davison Highway
Use the straight / slight right lanes.
6
Take the exit
0.3 mi
·
33 sec
Exit 3
Toward MO 30: Gravois Road
Use the slight right lane.
7
Keep slight right at fork
306 ft
·
7 sec
Toward MO 30 West: Fenton
Use the right lane.
8
Merge onto MO 30
2.4 mi
·
3 min
·
MO 30
9
Take the exit
0.2 mi
·
27 sec
Toward MO 141: Fenton, Valley Park
Use the right lane.
10
Turn left onto MO 141
4.0 mi
·
5 min
·
MO 141
Use the left / straight lanes.
11
Take the exit
0.2 mi
·
13 sec
Toward MO 21 South: Hillsboro
12
Merge onto MO 21
20 mi
·
23 min
·
Veterans Memorial Highway
13
At end of road, turn left onto MO 21; MO B
0.5 mi
·
49 sec
·
MO 21; MO B
14
Continue on MO 21
29 mi
·
46 min
·
MO 21
Use the straight lane.
15
Turn right onto MO 8
1.5 mi
·
2 min
·
East High Street
16
Turn straight onto MO 185
1.4 mi
·
2 min
·
MO 185
17
Turn left onto MO AA
3.8 mi
·
9 min
·
MO AA
18
Turn left
0.5 mi
·
2 min
19
Arrive at destination
Trip Plan
Morning Departure
Leave by 9 AM and you'll arrive before lunch.
Evening Departure
Even a 4 PM departure gets you there before dark in summer.
You can normally do this drive in one day.
You may only need one short stretch break if traffic stays light.
The halfway point lands around 43.9 miles from Florissant, MO, or about 57m into the drive.
The longest continuous stretch on this route runs about 29.7 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 19 miles or 26m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 43.9 miles or 57m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 1h 43m
Traffic, exits, and arrival timing usually matter more near Washington County, 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 87.9 miles and 2h 9m.
Your first comfortable stop window is around 19 miles from Florissant, MO.
This route can stay practical as a one-day drive if traffic stays reasonable.
The longest stretch is on MO 21 for about 29.7 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 43.9 mi from Florissant, MO · 57m into the drive
Mid-route town
Meal stop
44 mi into the route
Best for: Lunch, fuel, and a longer reset
This sits close to the middle of the route, so it works well for the longest stop of the day.
Pacing Suggestions
Fuel and coffee
A short stop after about 19 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 43.9 miles from Florissant, MO, which is a good place for a longer meal and fuel stop.
Arriving in Washington County, MO
The final approach into Washington County, MO usually feels slower than the middle of the drive, so avoid planning your tightest schedule at the very end.
Try to arrive with enough fuel left to skip an immediate station stop unless you already know the area around Washington County, MO.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
Fuel & Cost
Regular Gas
$13.74 one way
$27.48 round trip
$3.97/gal
25.4 MPG avg
31 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.36 | $15.09 | $30.18 |
| premium | $4.89 | $16.92 | $33.83 |
| diesel | $5.61 | $19.41 | $38.81 |
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$14
Meals
$25–$50
Total
$39–$64
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 30.8 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $9 in charging · 0 stops · 68% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 26.4 | 0 | $9.23 | $4.22 |
| Efficient EV | 22 | 0 | $7.69 | $3.52 |
| EV Truck/SUV | 35.2 | 0 | $12.31 | $5.63 |
Gas CO2
31 kg
EV CO2
10 kg (68% 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
Washington County, MO
Night in Washington County on Thursday
Local time
9:56 PM
CDT
Current temp
80°F
Unavailable
Live forecast
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
22 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
2h 9m 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.
Frequently Asked Questions
The drive from Florissant, MO to Washington County, MO covers 87.9 miles and takes about 2h 9m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are MO 21, Rosemary Straub Davison Highway, Veterans Memorial Highway. Expect a mix of highway and local road driving.
This is a comfortable same-day trip.
The midpoint is about 43.9 miles from Florissant, MO. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $13.74 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
Leave by 9 AM and you'll arrive before lunch. Even a 4 PM departure gets you there before dark in summer.
This is a demanding drive. With 14 significant decision points across 87.9 miles, you will need to stay alert - especially through interchange areas and urban stretches. Consider splitting it into segments if you are not comfortable with fast highway navigation.
The main spots that need attention: near the start (Washington Street): Navigation decision point; at 3.1 miles (I 270 / Rosemary Straub Davison Highway): Merge point - match speed before joining. Lane positioning matters here; at 23.9 miles: Exit ramp - move to the correct lane early. Lane positioning matters here.
On the drive from Florissant, MO to Washington County, MO, road signs begin pointing toward Valley Park along the way.
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