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Trip from Hazelwood, MO to O'Fallon, MO

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Compiled and reviewed by the US Trip Planner planning team at COD Solutions Oy · Last reviewed Apr 21, 2026 · Editorial standards

Drive Time

29m

Distance

20.1 mi

32 km

Drive Score

8/10

Great drive

Same Day?

Yes, doable

Fuel Cost

$3

one way

EV Charging

Good

6 stations

Best Time to Leave

Save up to 7 min
4 AM
0h 27m ★
6 AM
0h 29m
8 AM
0h 34m
10 AM
0h 31m
12 PM
0h 30m
3 PM
0h 31m
5 PM
0h 34m
8 PM
0h 28m

Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.

Best Time Drive vs Fly
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Downtown Hazelwood, MO, MO

Hazelwood, MO

Valeria Boltneva

Downtown O'Fallon, MO, MO

O'Fallon, MO

Wikimedia Commons

Trip Overview

Hazelwood, MO to O'Fallon, MO is 20.1 miles and takes about 29m via I 70, with a fuel budget near $3 and enough daylight to finish in a day. This short trip stays within the Midwest region, making it a simple transition between two Missouri locations. It’s a straightforward drive, primarily on major roadways, ideal for a quick commute or a brief excursion. Given its brevity, it’s perfectly suited for a same-day trip, allowing ample time for activities at your destination. Consider this route when you need to cover a short distance efficiently without venturing far from familiar territory.

Main Roads

Road Distance Duration
I 70 13.6 mi 16m
Rosemary Straub Davison Highway 2.1 mi 2m
East Terra Lane 0.9 mi 1m
McDonnell Boulevard 0.6 mi <1m
South Main Street 0.5 mi 1m
James S McDonnell Boulevard 0.3 mi <1m
Fee Fee Road 0.3 mi 1m
Chapel Ridge Drive 0.2 mi <1m
Longest stretch: I 70 — 13.6 mi, about 16m

Turn-by-Turn Driving Directions

Step-by-step road directions between Hazelwood, MO and O'Fallon, MO.

1

Start on Chapel Ridge Drive

0.2 mi · 56 sec · Chapel Ridge Drive
2

At end of road, turn left onto Fee Fee Road

0.3 mi · 1 min · Fee Fee Road
3

Turn slight right

147 ft · 5 sec
4

Turn right onto James S McDonnell Boulevard

0.3 mi · 27 sec · James S McDonnell Boulevard
Use the right lane.
5

Continue on McDonnell Boulevard

0.6 mi · 59 sec · McDonnell Boulevard
6

Take the ramp

0.4 mi · 53 sec
Toward I 270 West: Kansas City Use the left lane.
7

Merge onto I 270

2.1 mi · 2 min · Rosemary Straub Davison Highway
Use the straight / slight right lanes.
8

Take the exit

0.3 mi · 25 sec
Exit 20A Toward I 70: Saint Louis, Kansas City
9

Continue on this road

0.5 mi · 42 sec · this road
Exit 20A-B Toward I 70: Saint Louis, Kansas City Use the slight left / slight right lanes.
10

Keep slight right at fork

0.5 mi · 41 sec
Exit 20B Toward I 70 West: Kansas City Use the slight right lane.
11

Merge onto I 70

14 mi · 16 min · I 70
Use the straight / slight right lanes.
12

Take the exit

390 ft · 8 sec
Exit 218 Toward MO K: O'Fallon, Main Street Use the slight right lane.
13

Turn straight onto East Terra Lane

0.9 mi · 1 min · East Terra Lane
Use the straight lane.
14

Turn right onto South Main Street

0.5 mi · 1 min · South Main Street
15

Turn right

25 ft · 1 sec
16

Arrive at destination

Heads-up: tricky spots

5 of 12

5 decision points cluster between mile 0.2 and 18.6 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.

6
0.2 mi into trip | ~0m in | Fee Fee Road

At end of road, turn left onto Fee Fee Road

Complex interchange - multiple decisions in a short stretch

5
0.5 mi into trip | ~2m in | James S McDonnell Boulevard

Turn right onto James S McDonnell Boulevard

Lane positioning matters here

Use the right lane.
6
3.9 mi into trip | ~6m 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
4.6 mi into trip | ~8m 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
8
18.6 mi into trip | ~25m in

Take the exit toward MO K: O'Fallon, Main Street

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 218 Toward MO K: O'Fallon, Main Street

Fuel & Cost

Regular Gas

$3.14 one way

$6.28 round trip

$3.97/gal 25.4 MPG avg 7 kg CO2
Fuel Type $/gal One Way Round Trip
midgrade $4.36 $3.45 $6.90
premium $4.89 $3.87 $7.74
diesel $5.61 $4.44 $8.88

No toll roads detected on this route.

Drive Cost (one way)

Fuel

$3

Estimated CO2 emission: 7 kg one way. Prices: EIA weekly data, 2026-04-13.

Driving Electric?

About $2 in charging · 0 stops · 71% less CO2

Vehicle Type kWh Stops DC Fast Home Charge
Average EV 6 0 $2.11 $0.96
Efficient EV 5 0 $1.76 $0.80
EV Truck/SUV 8 0 $2.81 $1.29

Gas CO2

7 kg

EV CO2

2 kg (71% 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 Apr 19, 2026

Origin

Hazelwood, MO

Morning in Hazelwood on Tuesday

Local time

7:10 AM

CDT

Current temp

67°F

Sunny

W 14 mph 3% chance Live forecast

Flood Warning

Flood Warning issued April 19 at 11:39AM CDT by NWS Quad Cities IA IL

Flood Warning

Flood Warning issued April 19 at 11:38AM CDT until April 22 at 7:00PM CDT by NWS St Louis MO

Destination

O'Fallon, MO

Morning in O'Fallon on Tuesday

Local time

7:10 AM

CDT

Current temp

67°F

Sunny

W 13 mph 2% chance Live forecast

Flood Warning

Flood Warning issued April 19 at 11:39AM CDT by NWS Quad Cities IA IL

Flood Warning

Flood Warning issued April 19 at 11:38AM CDT until April 22 at 7:00PM CDT by NWS St Louis MO

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

Very similar conditions

Both ends of the route are sitting at about the same temperature right now.

Road read

29m on the road

The weather snapshot is not static. If you are leaving later, give both cities one more quick forecast check before departure.

Weather data from the National Weather Service. Conditions may change; check closer to your travel date.

What kind of drive is this?

This drive leans heavily towards highway travel, with 67% of the route utilizing major highways like I 70. You'll experience a consistent pace for much of the journey, including a longest stretch of 13.6 miles on I 70. The Rosemary Straub Davison Highway and East Terra Lane offer brief diversions from the interstate, but the overall character remains focused on efficient transit. Expect a smooth, relatively fast-paced experience, characteristic of a highway-focused profile.

67% highway — fuel and pacing are the main things to plan.
16 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 13.6 mi on I 70.

How Hard Is This Drive?

8/10

This is a straightforward highway drive that stays mostly on I 70 and Rosemary Straub Davison Highway. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 0.2 miles in near Fee Fee Road.

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 12 decision points packed into just 20.1 miles, you will need to pay attention to lane changes and exits — but the whole thing is over in 29m.

Where does it get tricky?

The main spots that need attention: at 0.2 miles (Fee Fee Road): Complex interchange - multiple decisions in a short stretch; at 0.5 miles (James S McDonnell Boulevard): Lane positioning matters here; at 3.9 miles: Exit ramp - move to the correct lane early. 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.

Between Hazelwood, MO and O'Fallon, MO, road signs point toward Kansas City and Mo K: O'fallon.

Kansas City

3.9 mi in | ~6m

Mo K: O'fallon

18.6 mi in | ~25m

About the Cities

Arriving in O'Fallon, MO

Full guide →

St. Charles, Missouri is outside of St. Louis on the bank of the Missouri River. It was Missouri's first state capital and was one of the first stops by Lewis and Clark on their journey to explore Louisiana Territory. The historic Main Street has largely been restored to its 1812-era appearance including gas lights a boardwalk and is lined with shops selling artwork, handicrafts, home decorations, antiques. There are also many restaurants.

City content from Wikivoyage (CC BY-SA 4.0) and Wikidata (CC0).

Who Is This Route For?

Weekend Trip

Doable as a same-day drive at 29m. Total distance: 20.1 miles.

Family Friendly

Moderate complexity with 0 natural rest stops along the way.

Solo Traveler

29m drive, comfortable solo distance.

EV Driver

0 DC fast chargers along the route. Coverage: unknown.

First-Time Driver

Mostly highway driving (67%). Some complex stretches to watch for.

Frequently Asked Questions

The longest stretch is about 13.6 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 O'Fallon, 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 0.2 miles (Fee Fee Road): Complex interchange - multiple decisions in a short stretch; at 0.5 miles (James S McDonnell Boulevard): Lane positioning matters here; at 3.9 miles: Exit ramp - move to the correct lane early. 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 O'Fallon, 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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