Origin
Green Park, MO
Morning in Green Park on Tuesday
Local time
10:23 AM
CDT
Current temp
72°F
Unavailable
Live forecast
Trip from Green Park, MO to Saint Peters, 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
42m
Distance
31.5 mi
51 km
Drive Score
6/10
Good drive
Same Day?
Yes, doable
Fuel Cost
$5
one way
EV Charging
Fair
3 stations
Best Time to Leave
4 AM
0h 39m
★
6 AM
0h 42m
8 AM
0h 50m
10 AM
0h 45m
12 PM
0h 44m
3 PM
0h 45m
5 PM
0h 49m
8 PM
0h 40m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Saint Peters, MO
Wikimedia Commons
Trip Overview
Green Park to Saint Peters is 31.5 miles and takes about 42 minutes via I-270 and I-70, with a fuel budget near $5 and enough daylight to finish in a day. This short drive stays within Missouri, moving from the Midwest region to another part of the Midwest. The route is predominantly highway, making it a quick and straightforward trip. It's ideal for a same-day excursion, offering a simple transition between two points in the greater St. Louis area.
Main Roads
| Road | Distance | Duration |
|---|---|---|
| I 270 | 16.6 mi | 20m |
| I 70 | 10.5 mi | 13m |
| Tesson Ferry Road | 1.1 mi | 2m |
| South Lindbergh Boulevard | 0.4 mi | <1m |
| Antigo Drive | 0.3 mi | 1m |
| Mueller Road | 0.3 mi | <1m |
| Arnett Drive | <0.1 mi | <1m |
Longest stretch:
I 270
— 16.6 mi, about 20m
Turn-by-Turn Driving Directions
Step-by-step road directions between Green Park, MO and Saint Peters, MO.
1
Start on Arnett Drive
302 ft
·
14 sec
·
Arnett Drive
2
Turn right onto Antigo Drive
0.3 mi
·
1 min
·
Antigo Drive
3
Turn left onto Mueller Road
0.3 mi
·
50 sec
·
Mueller Road
4
Turn right onto US 50; US 61; US 67
0.4 mi
·
56 sec
·
South Lindbergh Boulevard
5
Turn left onto MO 21
1.1 mi
·
2 min
·
Tesson Ferry Road
6
Take the ramp
0.3 mi
·
20 sec
Toward I 270 North
7
Merge onto I 270
17 mi
·
20 min
·
I 270
Use the straight lane.
8
Take the exit
1.0 mi
·
1 min
Exit 20A
Toward I 70: Kansas City, Saint Louis, Saint Louis Lambert International Airport
Use the slight right lane.
9
Keep slight left at fork
0.1 mi
·
11 sec
Toward I 70 West: Kansas City
Use the slight left lane.
10
Continue on this road
0.6 mi
·
57 sec
·
this road
Exit 20B
Toward I 70 West: Kansas City
11
Merge onto I 70
11 mi
·
13 min
·
I 70
Use the straight / slight right lanes.
12
Arrive at destination
I 70
Heads-up: tricky spots
5 of 85 decision points cluster between mile 0.4 and 21 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
4
0.4 mi into trip
|
~1m in
|
Mueller Road
Turn left onto Mueller Road
Navigation decision point
5
2.5 mi into trip
|
~6m in
|
I 270
Merge onto I 270
Merge point - match speed before joining. Lane positioning matters here
Use the straight lane.
8
19.2 mi into trip
|
~26m in
Take the exit toward I 70: Kansas City, Saint Louis, Saint Louis Lambert International Airport
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 20A
Toward I 70: Kansas City, Saint Louis, Saint Lo...
7
20.2 mi into trip
|
~28m in
Keep slight left at fork toward I 70 West: Kansas City
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight left lane.
Toward I 70 West: Kansas City
5
21 mi into trip
|
~29m in
|
I 70
Merge onto I 70
Merge point - match speed before joining. Lane positioning matters here
Use the straight / slight right lanes.
Fuel & Cost
Regular Gas
$4.92 one way
$9.85 round trip
$3.97/gal
25.4 MPG avg
11 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.36 | $5.41 | $10.81 |
| premium | $4.89 | $6.06 | $12.12 |
| diesel | $5.61 | $6.95 | $13.91 |
No toll roads detected on this route.
Drive Cost (one way)
Fuel
$5
Estimated CO2 emission: 11 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $3 in charging · 0 stops · 64% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 9.5 | 0 | $3.31 | $1.51 |
| Efficient EV | 7.9 | 0 | $2.76 | $1.26 |
| EV Truck/SUV | 12.6 | 0 | $4.41 | $2.02 |
Gas CO2
11 kg
EV CO2
4 kg (64% 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
Saint Peters, MO
Morning in Saint Peters on Tuesday
Local time
10:23 AM
CDT
Current temp
71°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
1 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
42m 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?
This drive is mostly highway, with 86% of the 31.5 miles on interstates like I-270 and I-70. You'll experience a continuous stretch of 16.6 miles on I-270, likely characterized by consistent speeds and multiple exits. The transition to surface roads, such as Tesson Ferry Road, will occur for the remaining 14% of the trip, offering a change in pace and traffic patterns as you approach your destination.
86% highway — fuel and pacing are the main things to plan.
12 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 16.6 mi on I 270.
How Hard Is This Drive?
7/10
This is a straightforward highway drive that stays mostly on I 270 and I 70. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 0.4 miles in near Mueller Road.
Driving Effort
7/10
Focused - busy navigation packed into a short drive
Balances navigation complexity with total wheel time.
This is a short but busy drive. With 8 decision points packed into just 31.5 miles, you will need to pay attention to lane changes and exits — but the whole thing is over in 42m.
Where does it get tricky?
The main spots that need attention: at 0.4 miles (Mueller Road): Navigation decision point; at 2.5 miles (I 270): Merge point - match speed before joining. Lane positioning matters here; at 19.2 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.
Between Green Park, MO and Saint Peters, MO, road signs point toward Saint Louis and Saint Louis Lambert International Airport.
Saint Louis
19.2 mi in
|
~26m
Saint Louis Lambert International Airport
19.2 mi in
|
~26m
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 42m. Total distance: 31.5 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
42m drive, comfortable solo distance.
EV Driver
0 DC fast chargers along the route. Coverage: unknown.
First-Time Driver
Mostly highway driving (86%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 16.6 miles on I 270. The full list of main roads is in the Roads section above.
Yes — we found about 3 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 Saint Peters, 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 0.4 miles (Mueller Road): Navigation decision point; at 2.5 miles (I 270): Merge point - match speed before joining. Lane positioning matters here; at 19.2 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 Saint Peters, 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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