Origin
Union, MO
Late night in Union on Tuesday
Local time
3:52 AM
CDT
Current temp
69°F
Unavailable
Live forecast
Trip from Union, MO to Florissant, MO
Pin this tripCompiled and reviewed by the US Trip Planner planning team at COD Solutions Oy · Last reviewed Apr 21, 2026 · Editorial standards
Drive Time
1h 14m
Distance
57.5 mi
92 km
Drive Score
7/10
Good drive
Same Day?
Yes, doable
Fuel Cost
$9
one way
EV Charging
Sparse
1 stations
Best Time to Leave
4 AM
1h 9m
★
6 AM
1h 15m
8 AM
1h 27m
10 AM
1h 19m
12 PM
1h 18m
3 PM
1h 20m
5 PM
1h 26m
8 PM
1h 11m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Union, MO
Wikimedia Commons
Florissant, MO
Wikimedia Commons
Trip Overview
This 57.5-mile drive from Union, MO, to Florissant, MO, is a straightforward trip that can easily be completed in about 1 hour and 14 minutes. Designed as a single-day excursion, you'll spend most of your time on highways, with 92% of the journey utilizing them. The estimated fuel cost for this Midwest to Midwest route is around $9, making it an economical choice. Given its short duration and highway-focused profile, this route is ideal for a quick hop, allowing for flexibility in your departure time and plenty of opportunity to enjoy your destination without feeling rushed.
Main Roads
| Road | Distance | Duration |
|---|---|---|
| US 50 | 33.8 mi | 40m |
| I 270 | 18.8 mi | 23m |
| North Lindbergh Boulevard | 1.8 mi | 3m |
| West Washington Street | 1 mi | 2m |
| East Main Street | 0.4 mi | 1m |
| North Church Street | 0.3 mi | 1m |
| East Park Avenue | 0.2 mi | <1m |
| MO 47 | <0.1 mi | <1m |
Longest stretch:
US 50
— 33.8 mi, about 40m
Turn-by-Turn Driving Directions
Step-by-step road directions between Union, MO and Florissant, MO.
1
Start on this road
62 ft
·
7 sec
·
this road
2
Turn right onto East Park Avenue
0.2 mi
·
26 sec
·
East Park Avenue
3
Turn right onto North Church Street
0.3 mi
·
1 min
·
North Church Street
4
Turn left onto East Main Street
0.4 mi
·
1 min
·
East Main Street
Use the straight / right lanes.
5
Turn right onto MO 47
515 ft
·
11 sec
·
MO 47
Use the straight / right lanes.
6
At end of road, turn left onto US 50; MO 47
2.4 mi
·
4 min
·
US 50; MO 47
Use the left lane.
7
Merge onto US 50
2.5 mi
·
3 min
·
US 50
Use the straight lane.
8
Keep slight left at fork onto US 50
29 mi
·
33 min
·
US 50
Toward I 44 East, US 50 East: Saint Louis
9
Take the exit
0.2 mi
·
18 sec
Exit 276
Toward I 270: Chicago, Memphis
Use the slight right lane.
10
Keep slight left at fork
0.1 mi
·
11 sec
Toward I 270 North: Chicago
Use the slight left lane.
11
Continue on this road
0.5 mi
·
52 sec
·
this road
Exit 276
Toward I 270 North: Chicago
12
Merge onto I 270
19 mi
·
23 min
·
I 270
Use the straight lane.
13
Take the exit
0.3 mi
·
44 sec
Exit 25
Toward US 67
Use the straight / slight right lanes.
14
Turn left onto US 67
1.8 mi
·
3 min
·
North Lindbergh Boulevard
Use the left lane.
15
Turn right onto West Washington Street
1.0 mi
·
2 min
·
West Washington Street
16
Turn left onto North New Florissant Road
87 ft
·
1 sec
·
North New Florissant Road
17
Arrive at destination
North New Florissant Road
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Mid-route town
Meal stop
29 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 13 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 28.7 miles from Union, MO, which is a good place for a longer meal and fuel stop.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
Heads-up: tricky spots
5 of 135 decision points cluster between mile 0.5 and 54.4 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
6
0.5 mi into trip
|
~1m in
|
East Main Street
Turn left onto East Main Street
Lane positioning matters here
Use the straight / right lanes.
6
5.8 mi into trip
|
~10m in
|
US 50
Keep slight left at fork onto US 50 toward I 44 East, US 50 East: Saint Louis
Highway fork - watch signs carefully. Multiple destination signs - pick the right one
Toward I 44 East, US 50 East: Saint Louis
8
34.8 mi into trip
|
~43m in
Take the exit toward I 270: Chicago, Memphis
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 276
Toward I 270: Chicago, Memphis
8
34.9 mi into trip
|
~44m in
Keep slight left at fork toward I 270 North: Chicago
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight left lane.
Toward I 270 North: Chicago
7
54.4 mi into trip
|
~1h 8m in
Take the exit toward US 67
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the straight / slight right lanes.
Exit 25
Toward US 67
Fuel & Cost
Regular Gas
$8.99 one way
$17.98 round trip
$3.97/gal
25.4 MPG avg
20 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.36 | $9.87 | $19.74 |
| premium | $4.89 | $11.07 | $22.13 |
| diesel | $5.61 | $12.70 | $25.39 |
No toll roads detected on this route.
Drive Cost (one way)
Fuel
$9
Estimated CO2 emission: 20.1 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $6 in charging · 0 stops · 65% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 17.3 | 0 | $6.04 | $2.76 |
| Efficient EV | 14.4 | 0 | $5.03 | $2.30 |
| EV Truck/SUV | 23 | 0 | $8.05 | $3.68 |
Gas CO2
20 kg
EV CO2
7 kg (65% 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
Florissant, MO
Late night in Florissant on Tuesday
Local time
3:52 AM
CDT
Current temp
72°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
3 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
1h 14m 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 predominantly highway-focused experience on this 57.5-mile route, with 92% of the travel occurring on interstate and major roadways like US 50 and I-270. You'll encounter a significant uninterrupted stretch of 33.8 miles on US 50, offering a consistent pace. North Lindbergh Boulevard will also play a role as you near your destination. The drive is characterized by its efficiency, prioritizing speed and directness over varied terrain or scenic detours. This profile means you'll likely experience a steady, predictable journey for the majority of the 1 hour and 14 minute duration.
92% highway — fuel and pacing are the main things to plan.
17 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 33.8 mi on US 50.
How Hard Is This Drive?
9/10
This is a straightforward highway drive that stays mostly on US 50 and I 270. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 0.5 miles in near East Main Street.
Driving Effort
9/10
Demanding - stay alert through the decision-heavy sections
Balances navigation complexity with total wheel time.
This drive requires moderate attention. Across 57.5 miles you will encounter 13 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 0.5 miles (East Main Street): Lane positioning matters here; at 5.8 miles (US 50): Highway fork - watch signs carefully. Multiple destination signs - pick the right one; at 34.8 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
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 Union, MO to Florissant, MO, road signs begin pointing toward Memphis along the way.
Memphis
34.8 mi in
|
~43m
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 1h 14m. Total distance: 57.5 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
1h 14m drive, comfortable solo distance.
EV Driver
0 DC fast chargers along the route. Coverage: unknown.
First-Time Driver
Mostly highway driving (92%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 33.8 miles on US 50. 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 Florissant, 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 0.5 miles (East Main Street): Lane positioning matters here; at 5.8 miles (US 50): Highway fork - watch signs carefully. Multiple destination signs - pick the right one; at 34.8 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
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 Florissant, 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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