Saint Peters, MO to Gallatin, MO is 244.4 miles and takes about 4h 52m via Chicago-Kansas City Expressway and US 36 Business, with a fuel budget near $43 and enough daylight to finish in a day. This trip stays within Missouri, taking you from the Midwest region to another part of the Midwest. With over half of the drive on highways, it's a straightforward route for a single-day trip. Consider this route if you're looking for an efficient way to travel between these two points without needing an overnight stay.
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
122.2 miles from Saint Peters, MO
A natural place for your longest stop of the day
, about 2h 26m into the drive
.
Main Roads
Road
Distance
Duration
Chicago-Kansas City Expressway
136.6 mi
2h 37m
Avenue of the Saints
73.3 mi
1h 26m
US 36 Business
14 mi
21m
I 70
11.1 mi
13m
V.F.W. Memorial Highway
5.8 mi
6m
Veterans Road
2.2 mi
3m
Paris Gravel Road
0.5 mi
1m
County Road 422
<0.1 mi
<1m
Longest stretch:
Chicago-Kansas City Expressway
— 136.6 mi, about 2h 37m
Traffic on I-70
Hour-of-day weekday pattern from 6 FHWA count stations on your route.
Peak
3 PM
~3,169 veh/hr typical
· worst 3,683
Quietest
1 AM
~265 veh/hr
Peak-to-quiet ratio
12×
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 Saint Peters, MO and Gallatin, MO.
1
Start on I 70
11 mi·13 min·I 70
Use the straight / slight right lanes.
2
Take the exit
0.4 mi·47 sec
Exit 210BToward US 61 North: HannibalUse the slight right lane.
3
Merge onto US 61
73 mi·1 hr 26 min·Avenue of the Saints
Use the right lane.
4
Take the exit
249 ft·14 sec
5
Turn left onto Paris Gravel Road
0.5 mi·1 min·Paris Gravel Road
6
Keep slight right at fork onto County Road 422
279 ft·8 sec·County Road 422
7
Turn right onto Veterans Road
2.2 mi·3 min·Veterans Road
8
Take the ramp
0.2 mi·16 sec
Toward US 36 West, MO 110 West: Monroe City
9
Merge onto US 36; MO 110
5.8 mi·6 min·V.F.W. Memorial Highway
10
Continue on US 24; US 36; MO 110
137 mi·2 hr 37 min·Chicago-Kansas City Expressway
11
Take the exit onto US 36 Business
0.1 mi·22 sec·US 36 Business
Toward MO 13, US 36 Business: Hamilton
12
Turn right onto US 36 Business; MO 13
14 mi·20 min·US 36 Business; MO 13
13
Turn left onto West Grand Street
222 ft·6 sec·West Grand Street
14
Arrive at destination
West Grand Street
Trip Plan
This 244.4-mile drive is easily manageable in a single day, so you have flexibility with your departure time. Leaving Saint Peters in the morning, perhaps around 9 AM, should get you to Gallatin by mid-afternoon, leaving plenty of time to settle in. The longest stretch without a major road change is 136.6 miles, so plan for a fuel stop before or early in that segment if your tank is low. Given the 4h 52m estimated duration and a fuel cost around $43, this is an economical and time-efficient trip.
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 122.2 miles from Saint Peters, MO, or about 2h 26m into the drive.
The longest continuous stretch on this route runs about 136.6 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 54 miles or 1h 4m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 122.2 miles or 2h 26m 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 56m
Traffic, exits, and arrival timing usually matter more near Gallatin, 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 244.4 miles and 4h 52m.
Your first comfortable stop window is around 54 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 Chicago-Kansas City Expressway for about 136.6 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 12
5 decision points cluster between mile 11.1 and 230.3 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
7
11.1 mi into trip|~13m in
Take the exit toward US 61 North: Hannibal
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the slight right lane.
Exit 210B
Toward US 61 North: Hannibal
5
11.5 mi into trip|~14m in|US 61 / Avenue of the Saints
Merge onto US 61 / Avenue of the Saints
Merge point - match speed before joining. Lane positioning matters here
Use the right lane.
4
84.8 mi into trip|~1h 41m in|Paris Gravel Road
Turn left onto Paris Gravel Road
Navigation decision point
6
87.6 mi into trip|~1h 46m in
Take the ramp toward US 36 West, MO 110 West: Monroe City
Multiple destination signs - pick the right one
Toward US 36 West, MO 110 West: Monroe City
5
230.3 mi into trip|~4h 31m in|US 36 Business
Take the exit onto US 36 Business toward MO 13, US 36 Business: Hamilton
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Toward MO 13, US 36 Business: Hamilton
Fuel & Cost
Regular Gas
$36.09 one way
$72.18 round trip
$3.75/gal25.4 MPG avg86 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.14
$39.84
$79.69
premium
$4.72
$45.38
$90.76
diesel
$4.80
$46.15
$92.29
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$36
Meals
$25–$50
Total
$61–$86
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 85.5 kg one way.
Prices: EIA weekly data, 2026-07-13.
Driving Electric?
About $26 in charging
· 0 stops
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
73.3
0
$25.66
$11.73
Efficient EV
61.1
0
$21.39
$9.78
EV Truck/SUV
97.8
1
$34.22
$15.64
Gas CO2
86 kg
EV CO2
29 kg (66% less)
Plan for 0 charging stops, roughly every 270 miles. Allow 25-40 minutes per stop at a DC fast charger.
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 18, 2026
Origin
Saint Peters, MO
Late night
in Saint Peters on Sunday
Local time
5:26 AM
CDT
Current temp
93°F
Mostly Sunny
W 7 to 10 mph8% chanceLive forecast
Heat Advisory
Heat Advisory issued July 18 at 4:25AM CDT until July 18 at 8:00PM CDT by NWS Memphis TN
Heat Advisory
Heat Advisory issued July 18 at 3:04AM CDT until July 21 at 7:00PM CDT by NWS St Louis MO
Destination
Gallatin, MO
Late night
in Gallatin on Sunday
Local time
5:26 AM
CDT
Current temp
92°F
Sunny then Slight Chance Showers And Thunderstorms
WSW 8 mph24% chanceLive forecast
Heat Advisory
Heat Advisory issued July 18 at 4:25AM CDT until July 18 at 8:00PM CDT by NWS Memphis TN
Heat Advisory
Heat Advisory issued July 18 at 3:04AM CDT until July 21 at 7:00PM CDT by NWS St Louis MO
91°F
Quincy, IL
122 mi in
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
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
4h 52m 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?
You'll spend about 66% of the 244.4 miles on highways, with the longest continuous stretch of highway driving being 136.6 miles on the Chicago-Kansas City Expressway. The remainder of the route transitions to surface roads, particularly US 36 Business as you approach your destination. Expect a mix of consistent highway cruising and more typical surface street navigation as you get closer to Gallatin.
66% highway — fuel and pacing are the main things to plan.
14 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 136.6 mi on Chicago-Kansas City Expressway.
How Hard Is This Drive?
6/10
This is a straightforward highway drive that stays mostly on Chicago-Kansas City Expressway and Avenue of the Saints. You will hit about 12 points where you need to pay attention to lane position or signs. The trickiest moment comes around 11.1 miles in.
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 244.4 miles you will encounter 12 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 11.1 miles: Exit ramp - move to the correct lane early. Lane positioning matters here; at 11.5 miles (US 61 / Avenue of the Saints): Merge point - match speed before joining. Lane positioning matters here; at 84.8 miles (Paris Gravel Road): Navigation decision point.
Doable as a same-day drive at 4h 52m. Total distance: 244.4 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
4h 52m drive, comfortable solo distance.
Frequently Asked Questions
The longest stretch is about 136.6 miles on Chicago-Kansas City Expressway. 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 Gallatin, 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 3 rest areas along the route for bathroom stops.
The main spots that need attention: at 11.1 miles: Exit ramp - move to the correct lane early. Lane positioning matters here; at 11.5 miles (US 61 / Avenue of the Saints): Merge point - match speed before joining. Lane positioning matters here; at 84.8 miles (Paris Gravel Road): Navigation decision point.
Yes — Gateway Arch National Park. See the National Parks section for detour distances and tips on detours.
Possible but tiring. At 4.9 hours each way, an in-and-out day trip would put you behind the wheel for 9.7 hours — manageable with a long break at Gallatin, MO, but most travelers stay overnight.
