Knob Noster, MO to St. Louis, MO is 208.1 miles and takes about 4h 6m via Dwight D. Eisenhower Highway, with a fuel budget near $32 and enough daylight to finish in a day. This drive stays within the Midwest, taking you from one point in Missouri to another. It's a single-day trip that primarily uses surface roads, making it a straightforward option for getting across the state. Plan for about 4 hours of driving time, plus any stops you might want to make along the way.
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
104 miles from Knob Noster, MO
A natural place for your longest stop of the day
, about 2h 1m into the drive
.
Main Roads
Road
Distance
Duration
Dwight D. Eisenhower Highway
82.8 mi
1h 37m
U.S. Submarine Veterans' Memorial Highway
45.3 mi
48m
Avenue of the Saints
27.7 mi
33m
US 65
17.9 mi
21m
US 50
15.9 mi
18m
Jack Buck Memorial Highway
5.8 mi
7m
Daniel Boone Expressway
5.7 mi
7m
Sheriff Roger I. Wilson Memorial Highway
1.9 mi
2m
Longest stretch:
Dwight D. Eisenhower Highway
— 82.8 mi, about 1h 37m
Traffic on I-70
Hour-of-day weekday pattern from 28 FHWA count stations on your route.
Peak
3 PM
~1,993 veh/hr typical
· worst 2,486
Quietest
1 AM
~217 veh/hr
Peak-to-quiet ratio
9.2×
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 Knob Noster, MO and St. Louis, MO.
1
Start on North Madison Avenue
21 ft·1 sec·North Madison Avenue
2
Continue on West South Railroad Street
0.1 mi·34 sec·West South Railroad Street
3
Turn left onto MO J
0.1 mi·28 sec·North State Street
4
At end of road, turn right onto US 50
16 mi·18 min·US 50
5
Turn left onto West Main Street
186 ft·7 sec·West Main Street
6
Continue on West Main Street
1.7 mi·3 min·West Main Street
7
Take the ramp
0.1 mi·27 sec
Toward US 65 South
8
Turn sharp left onto US 65
18 mi·21 min·US 65
9
Take the exit
0.4 mi·39 sec
Toward I 70 East: Saint Louis
10
Merge onto I 70; US 40
23 mi·24 min·U.S. Submarine Veterans' Memorial Highway
11
Keep slight left at fork onto I 70
22 mi·24 min·U.S. Submarine Veterans' Memorial Highway
12
Continue on I 70; US 40
1.8 mi·2 min·Dwight D. Eisenhower Highway
13
Continue on I 70; US 40
1.6 mi·1 min·Highway Patrol Sgt. Benjamin Booth Memorial Highway
14
Continue on I 70; US 40
1.9 mi·2 min·Sheriff Roger I. Wilson Memorial Highway
15
Continue on I 70; US 40
81 mi·1 hr 35 min·Dwight D. Eisenhower Highway
16
Take the exit onto US 40
0.3 mi·33 sec·US 40
Exit 210AToward I 64 East, US 40 East, US 61 South: Chesterfield
17
Merge onto I 64; US 40; US 61
28 mi·33 min·Avenue of the Saints
Use the straight / slight left lanes.
18
Continue on I 64; US 40
5.7 mi·7 min·Daniel Boone Expressway
Use the straight lane.
19
Continue on I 64; US 40
5.8 mi·7 min·Jack Buck Memorial Highway
Use the straight / slight right lanes.
20
Take the exit
0.2 mi·34 sec
Exit 39AToward 14th StreetUse the slight right lane.
21
Turn left onto South 14th Street
0.3 mi·42 sec·South 14th Street
Use the left lane.
22
Turn right onto Market Street
0.2 mi·25 sec·Market Street
23
Arrive at destination
Market Street
Trip Plan
Since this is a single-day trip of about 4 hours, you have a good amount of flexibility with your departure time. Leaving in the morning should give you plenty of daylight to reach St. Louis comfortably. With only one recommended stop, you can decide on the fly where to take a break, perhaps after the 82.8-mile stretch on Dwight D. Eisenhower Highway. Keep an eye on your fuel, especially as you transition to surface roads, and factor in the estimated $32 cost. This route is designed for a relaxed pace, so don't feel rushed.
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 104 miles from Knob Noster, MO, or about 2h 1m into the drive.
The longest continuous stretch on this route runs about 82.8 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 46 miles or 56m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 104 miles or 2h 1m 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 19m
Traffic, exits, and arrival timing usually matter more near St. Louis, MO than in the middle of the route.
Before You Leave
+
Open the route before leaving Knob Noster, 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 Knob Noster, MO
This is one driving day of about 208.1 miles and 4h 6m.
Your first comfortable stop window is around 46 miles from Knob Noster, 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 Dwight D. Eisenhower Highway for about 82.8 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 13
5 decision points cluster between mile 0.3 and 207.4 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
5
0.3 mi into trip|~1m in|US 50
At end of road, turn right onto US 50
Navigation decision point
5
18 mi into trip|~24m in|US 65
Turn sharp left onto US 65
Sharp turn - reduce speed on approach
6
167.9 mi into trip|~3h 16m in|US 40
Take the exit onto US 40 toward I 64 East, US 40 East, US 61 South: Chesterfield
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Exit 210A
Toward I 64 East, US 40 East, US 61 South: Ches...
5
168.2 mi into trip|~3h 17m in|I 64; US 40; US 61 / Avenue of the Saints
Merge onto I 64; US 40; US 61 / Avenue of the Saints
Merge point - match speed before joining. Lane positioning matters here
Use the straight / slight left lanes.
7
207.4 mi into trip|~4h 5m in
Take the exit toward 14th Street
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the slight right lane.
Exit 39A
Toward 14th Street
Fuel & Cost
Regular Gas
$30.73 one way
$61.46 round trip
$3.75/gal25.4 MPG avg73 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.14
$33.93
$67.85
premium
$4.72
$38.64
$77.28
diesel
$4.80
$39.29
$78.59
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: 72.8 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
62.4
0
$21.85
$9.99
Efficient EV
52
0
$18.21
$8.32
EV Truck/SUV
83.2
1
$29.13
$13.32
Gas CO2
73 kg
EV CO2
24 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 17, 2026
Origin
Knob Noster, MO
Evening
in Knob Noster on Monday
Local time
6:48 PM
CDT
Current temp
92°F
Slight Chance Showers And Thunderstorms
SW 9 mph15% chanceLive forecast
Special Weather Statement
Special Weather Statement issued July 17 at 2:27PM CDT by NWS Quad Cities IA IL
Special Weather Statement
Special Weather Statement issued July 17 at 2:25PM CDT by NWS Quad Cities IA IL
Destination
St. Louis, MO
Evening
in St. Louis on Monday
Local time
6:48 PM
CDT
Current temp
92°F
Slight Chance Showers And Thunderstorms
W 8 mph20% chanceLive forecast
Special Weather Statement
Special Weather Statement issued July 17 at 2:27PM CDT by NWS Quad Cities IA IL
Special Weather Statement
Special Weather Statement issued July 17 at 2:25PM CDT by NWS Quad Cities IA IL
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
Very similar conditions
Both ends of the route are sitting at about the same temperature right now.
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 route is mostly surface roads, with only 19% of the drive on highways. You'll spend most of your time on Dwight D. Eisenhower Highway, which accounts for the longest continuous stretch of 82.8 miles. Expect to transition from highway cruising to navigating surface roads with more frequent intersections and potentially slower speeds. The U.S. Submarine Veterans' Memorial Highway and Avenue of the Saints are also part of the path.
Only 19% highway — the rest is turn-by-turn surface driving.
23 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 82.8 mi on Dwight D. Eisenhower Highway.
How Hard Is This Drive?
6/10
Expect a hands-on drive with frequent turns and local roads rather than long highway stretches. You will hit about 13 points where you need to pay attention to lane position or signs. The trickiest moment comes around 0.3 miles in near US 50.
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 208.1 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 0.3 miles (US 50): Navigation decision point; at 18 miles (US 65): Sharp turn - reduce speed on approach; at 167.9 miles (US 40): Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one.
The Gateway City of St. Louis is the epitome of the modern Midwestern metropolis. Missouri's second-largest city is vibrant but laid-back, populous but navigable, historic but still relevant. The city's planners have created an aesthetically beautiful city, with plenty of green space amidst buildings both old and new, framed by the majestic Mississippi and Missouri rivers. And capping it all is the world's tallest man-made monument, the beautiful and iconic Gateway Arch.
St. Louis is a city of culture and surprisingly inexpensive. Among American cities, only Washington, D.C. has more free attractions for tourists and residents alike. Hotels, restaurants, and even parking garages avoid the premium pricing common in other big cities. Although often overlooked, St. Louis can be an affordable, educational, and fun family getaway.
Top landmarks
•Gateway Arch — monument in St. Louis, Missouri
•Missouri Botanical Garden — non-profit organization in the USA
•Gateway Arch National Park — American National Park in St. Louis, Missouri
Doable as a same-day drive at 4h 6m. Total distance: 208.1 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
4h 6m drive, comfortable solo distance.
Scenic Drive
Mostly surface roads route profile with national parks nearby.
Frequently Asked Questions
The longest stretch is about 82.8 miles on Dwight D. Eisenhower Highway. The full list of main roads is in the Roads section above.
Yes — we found about 23 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 St. Louis, 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 23 rest areas along the route for bathroom stops.
The main spots that need attention: at 0.3 miles (US 50): Navigation decision point; at 18 miles (US 65): Sharp turn - reduce speed on approach; at 167.9 miles (US 40): 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.
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 St. Louis, MO, but most travelers stay overnight.
