Saint Peters, MO to Polk, MO is 207 miles and takes about 4h 14m via US 54 and I 70, with a fuel budget near $32 and enough daylight to finish in a day. This trip stays entirely within the Midwest region, traversing Missouri for its entirety. Given the relatively short duration and a high percentage of highway driving, this route is well-suited for a single day. You'll find it a straightforward drive, making it a practical option for moving between these two points.
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
103.5 miles from Saint Peters, MO
A natural place for your longest stop of the day
, about 2h 1m into the drive
.
Main Roads
Road
Distance
Duration
US 54
116.2 mi
2h 17m
I 70
73.6 mi
1h 25m
MO 64
9.5 mi
16m
MO D
7.5 mi
14m
Longest stretch:
US 54
— 116.2 mi, about 2h 17m
Traffic on I-70
Hour-of-day weekday pattern from 10 FHWA count stations on your route.
Peak
3 PM
~2,340 veh/hr typical
· worst 2,883
Quietest
1 AM
~235 veh/hr
Peak-to-quiet ratio
10×
busier at peak than in the quiet hours
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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 Saint Peters, MO and Polk, MO.
1
Start on I 70
74 mi·1 hr 25 min·I 70
Use the straight / slight right lanes.
2
Take the exit
0.2 mi·27 sec
Exit 148Toward US 54: Auxvasse, Mexico, Fulton
3
Turn left onto US 54
116 mi·2 hr 17 min·US 54
Use the slight right lane.
4
Turn left onto MO D
5.4 mi·9 min·MO D
5
Continue on MO 64
9.5 mi·16 min·MO 64
6
Continue on MO D
2.1 mi·5 min·MO D
7
Arrive at destination
MO D
Trip Plan
With a drive time under four and a half hours, you have flexibility in when you depart. Leaving in the morning allows ample time for the drive and any brief stops needed. The longest stretch without a major road change is over 116 miles on US 54, so plan your fuel and rest stops accordingly before you embark on that section. Keep an eye on your fuel gauge, as the estimated cost is around $32, and it’s always wise to top off before heading into longer stretches of highway driving.
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 103.5 miles from Saint Peters, MO, or about 2h 1m into the drive.
The longest continuous stretch on this route runs about 116.2 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 53m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 103.5 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 Polk, MO than in the middle of the route.
Before You Leave
+
Open the route before leaving Saint Peters, 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 Saint Peters, MO
This is one driving day of about 207 miles and 4h 14m.
Your first comfortable stop window is around 46 miles from Saint Peters, 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 US 54 for about 116.2 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
4 of 4
4 decision points cluster between mile 0 and 190 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
3
0 mi into trip|~0m in|I 70
Depart onto I 70
Lane positioning matters here
Use the straight / slight right lanes.
6
73.6 mi into trip|~1h 25m in
Take the exit toward US 54: Auxvasse, Mexico, Fulton
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Exit 148
Toward US 54: Auxvasse, Mexico, Fulton
4
73.8 mi into trip|~1h 26m in|US 54
Turn left onto US 54
Lane positioning matters here
Use the slight right lane.
3
190 mi into trip|~3h 43m in|MO D
Turn left onto MO D
Navigation decision point
Fuel & Cost
Regular Gas
$30.57 one way
$61.14 round trip
$3.75/gal25.4 MPG avg72 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.14
$33.75
$67.50
premium
$4.72
$38.43
$76.87
diesel
$4.80
$39.09
$78.17
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: 72.4 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
62.1
0
$21.74
$9.94
Efficient EV
51.8
0
$18.11
$8.28
EV Truck/SUV
82.8
1
$28.98
$13.25
Gas CO2
72 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 19, 2026
Origin
Saint Peters, MO
Morning
in Saint Peters on Sunday
Local time
6:06 AM
CDT
Current temp
75°F
Slight Chance Showers And Thunderstorms
W 1 to 5 mph18% chanceLive forecast
Heat Advisory
Heat Advisory issued July 18 at 7:55PM CDT until July 19 at 9:00PM CDT by NWS Memphis TN
Special Weather Statement
Special Weather Statement issued July 18 at 7:39PM CDT by NWS Paducah KY
Destination
Polk, MO
Morning
in Polk on Sunday
Local time
6:06 AM
CDT
Current temp
72°F
Slight Chance Showers And Thunderstorms
SW 5 mph18% chanceLive forecast
Heat Advisory
Heat Advisory issued July 18 at 7:55PM CDT until July 19 at 9:00PM CDT by NWS Memphis TN
Special Weather Statement
Special Weather Statement issued July 18 at 7:39PM CDT by NWS Paducah KY
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 14m 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 almost entirely highway, with 96% of the drive on major roads. You'll experience a long continuous stretch of 116.2 miles on US 54, which means you can settle into a cruising rhythm for a significant portion of the trip. Expect frequent exits and merges as you navigate the highway system, especially as you transition between I 70 and US 54.
96% highway — fuel and pacing are the main things to plan.
7 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 116.2 mi on US 54.
How Hard Is This Drive?
3/10
This is a straightforward highway drive that stays mostly on US 54 and I 70. There are only a few real navigation decisions along the way. The trickiest moment comes early in the drive near I 70.
Driving Effort3/10
Easy - simple navigation with a manageable amount of wheel time
Balances navigation complexity with total wheel time.
This is a straightforward 4h 14m drive. You will face about 4 decision points, but nothing that requires special attention if you follow navigation.
Where does it get tricky?
The main spots that need attention: near the start (I 70): Lane positioning matters here; at 73.6 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 73.8 miles (US 54): Lane positioning matters here.
Elevation Profile
Gently rolling terrain
1,043 ft443 ft
Total Climb
1,028 ft
Total Descent
428 ft
Highest Point
1,043 ft
~207 mi in
Elevation Range
599 ft
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Saint Peters, MO and Polk, MO, road signs point toward Mexico and Fulton.
The longest stretch is about 116.2 miles on US 54. The full list of main roads is in the Roads section above.
Yes — we found about 14 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.
Yes, with realistic expectations. Build in a stop roughly every 2 hours, have snacks and activities ready, and check the Nearby Places tabs for kid-friendly stops along the way.
The main spots that need attention: near the start (I 70): Lane positioning matters here; at 73.6 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 73.8 miles (US 54): 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 4.2 hours each way, an in-and-out day trip would put you behind the wheel for 8.5 hours — manageable with a long break at Polk, MO, but most travelers stay overnight.
