Origin
Dellwood, MO
Late night in Dellwood on Sunday
Local time
5:00 AM
CDT
Current temp
58°F
Unavailable
Live forecast
Trip from Dellwood, MO to Saint Peters, MO
Compiled and reviewed by the US Trip Planner planning team at COD Solutions Oy · Last reviewed Apr 19, 2026 · Editorial standards
Drive Time
27m
Distance
21.1 mi
34 km
Drive Score
6/10
Good drive
Same Day?
Yes, doable
Fuel Cost
$3
one way
EV Charging
Fair
3 stations
Best Time to Leave
4 AM
0h 25m
★
6 AM
0h 28m
8 AM
0h 32m
10 AM
0h 29m
12 PM
0h 29m
3 PM
0h 29m
5 PM
0h 32m
8 PM
0h 26m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Dellwood, MO
Momo King
Saint Peters, MO
Wikimedia Commons
Trip Overview
Dellwood, MO to Saint Peters, MO is 21.1 miles and takes about 27m 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, connecting two points in Missouri. Given its brief duration and mostly highway profile, it's a straightforward drive perfect for a quick commute or a brief leg of a longer journey. You'll spend most of your time on the interstate, so expect typical highway conditions without much variation in scenery.
Main Roads
| Road | Distance | Duration |
|---|---|---|
| I 70 | 16.6 mi | 20m |
| Airport Road | 1.8 mi | 2m |
| Inner Belt Expressway | 0.8 mi | <1m |
| Chambers Road | 0.7 mi | 1m |
| Hereford Avenue | 0.4 mi | <1m |
Longest stretch:
I 70
— 16.6 mi, about 20m
Turn-by-Turn Driving Directions
Step-by-step road directions between Dellwood, MO and Saint Peters, MO.
1
Start on Chambers Road
0.7 mi
·
1 min
·
Chambers Road
2
Continue on Hereford Avenue
0.4 mi
·
39 sec
·
Hereford Avenue
3
Continue on Airport Road
1.8 mi
·
2 min
·
Airport Road
4
Take the ramp
0.3 mi
·
19 sec
Toward I 170 South
5
Merge onto I 170
0.8 mi
·
59 sec
·
Inner Belt Expressway
6
Take the exit
0.4 mi
·
48 sec
Exit 7B
Toward I 70 West: Kansas City
Use the slight right lane.
7
Merge onto I 70
17 mi
·
20 min
·
I 70
Use the straight lane.
8
Arrive at destination
I 70
Heads-up: tricky spots
4 of 44 decision points cluster between mile 3 and 4.5 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
4
3 mi into trip
|
~4m in
Take the ramp toward I 170 South
Navigation decision point
Toward I 170 South
3
3.3 mi into trip
|
~5m in
|
I 170 / Inner Belt Expressway
Merge onto I 170 / Inner Belt Expressway
Merge point - match speed before joining
7
4.1 mi into trip
|
~6m in
Take the exit toward I 70 West: Kansas City
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the slight right lane.
Exit 7B
Toward I 70 West: Kansas City
5
4.5 mi into trip
|
~6m in
|
I 70
Merge onto I 70
Merge point - match speed before joining. Lane positioning matters here
Use the straight lane.
Fuel & Cost
Regular Gas
$3.30 one way
$6.60 round trip
$3.97/gal
25.4 MPG avg
7 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.36 | $3.62 | $7.24 |
| premium | $4.89 | $4.06 | $8.12 |
| diesel | $5.61 | $4.66 | $9.32 |
No toll roads detected on this route.
Drive Cost (one way)
Fuel
$3
Estimated CO2 emission: 7.4 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 | 6.3 | 0 | $2.22 | $1.01 |
| Efficient EV | 5.3 | 0 | $1.85 | $0.84 |
| EV Truck/SUV | 8.4 | 0 | $2.95 | $1.35 |
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.
Destination
Saint Peters, MO
Late night in Saint Peters on Sunday
Local time
5:00 AM
CDT
Current temp
57°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
27m 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 route is primarily highway, with 82% of the drive on interstates. You'll experience a longest stretch of 16.6 miles on I 70. The highway portion concludes as you transition to Airport Road and Inner Belt Expressway for the final stretch into Saint Peters. Expect a relatively quick drive with frequent exits common to interstate travel.
82% highway — fuel and pacing are the main things to plan.
8 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 16.6 mi on I 70.
How Hard Is This Drive?
3/10
This is a straightforward highway drive that stays mostly on I 70 and Airport Road. There are only a few real navigation decisions along the way. The trickiest moment comes around 3 miles in.
Driving Effort
3/10
Easy - simple navigation with a manageable amount of wheel time
Balances navigation complexity with total wheel time.
This is a straightforward 27m 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: at 3 miles: Navigation decision point; at 3.3 miles (I 170 / Inner Belt Expressway): Merge point - match speed before joining; at 4.1 miles: Exit ramp - move to the correct lane early. Lane positioning matters here.
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 27m. Total distance: 21.1 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
27m drive, comfortable solo distance.
EV Driver
0 DC fast chargers along the route. Coverage: unknown.
First-Time Driver
Mostly highway driving (82%). Straightforward navigation.
Frequently Asked Questions
The longest stretch is about 16.6 miles on I 70. The full list of main roads is in the Roads section above.
Yes — we found about 2 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. 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 3 miles: Navigation decision point; at 3.3 miles (I 170 / Inner Belt Expressway): Merge point - match speed before joining; at 4.1 miles: Exit ramp - move to the correct lane early. Lane positioning matters here.
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.
Was this helpful?
Thanks for your feedback!
Your tip has been submitted. Thanks!
/500
Recent Tips
·
Explore More
Continue From Saint Peters, MO
More trips to Saint Peters, MO
Explore more options from Dellwood, MO or browse trips ending in Saint Peters, MO.
Looking for more statewide routes? Browse MO road trips.