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Trip from Saint Peters, MO to Mexico, MO

Last recalculated Apr 16, 2026

Drive Time

1h 47m

Distance

91.2 mi

147 km

Drive Score

7/10

Good drive

Same Day?

Yes, doable

Fuel Cost

$14

one way

EV Charging

None

Best Time to Leave

Save up to 24 min
4 AM
1h 40m ★
6 AM
1h 48m
8 AM
2h 4m
10 AM
1h 53m
12 PM
1h 52m
3 PM
1h 54m
5 PM
2h 3m
8 PM
1h 43m

Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.

Best Time Drive vs Fly
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city in Missouri

Saint Peters, MO

Wikimedia Commons

city in and county seat of Audrain County, Missouri, United States

Mexico, MO

Wikimedia Commons

Trip Overview

The drive from Saint Peters, MO to Mexico, MO covers 91.2 miles and takes about 1h 47m behind the wheel. This route is realistic as a one-day drive if you keep your stops efficient.

The route leans on I 70, US 54, US 54 Business for much of the mileage, and the overall profile is highway-focused drive. The longest uninterrupted segment is about 73.6 miles on I 70. At current regular gas prices, budget about $14.26 one way before food or hotel costs.

Trip Pace

Same-day drive is realistic

A same-day return is realistic if you keep stops short.

Midpoint

45.6 miles from Saint Peters, MO

A natural place for your longest stop of the day , about 53m into the drive .

Who Is This Route For?

Weekend Trip

Doable as a same-day drive at 1h 47m. Total distance: 91.2 miles.

Family Friendly

Moderate complexity with 0 natural rest stops along the way.

Solo Traveler

1h 47m drive, comfortable solo distance.

First-Time Driver

Mostly highway driving (99%). Straightforward navigation.

Drive Character

This is a 1h 47m highway drive covering 91.2 miles, with most of the trip on I 70 and US 54. The longest continuous stretch is about 73.6 miles on I 70.

Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 8 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
I 70 is the longest continuous segment at about 73.6 miles.

Elevation Profile

Mostly flat terrain

891 ft 443 ft

Total Climb

488 ft

Total Descent

133 ft

Highest Point

891 ft

~39.1 mi in

Elevation Range

447 ft

How Hard Is This Drive?

This is a straightforward highway drive that stays mostly on I 70 and US 54. Navigation is very simple — set it and forget it for most of the drive. The trickiest moment comes early in the drive near I 70.

Driving Effort 1/10

Very easy - short and simple to drive

Balances navigation complexity with total wheel time.

The drive from Saint Peters, MO to Mexico, MO is easy. At 1h 47m with 99% highway, most drivers will find it relaxed and low-stress.

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 87.1 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one.

Critical Maneuvers

5 of 6 key points

These are the spots where you need to pay the most attention. Preview them before you drive.

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
5
87.1 mi into trip | ~1h 40m in

Take the exit toward US 54 Business, MO 15, MO 22: Mexico

Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one

Toward US 54 Business, MO 15, MO 22: Mexico
4
87.3 mi into trip | ~1h 41m in | US 54 Business; MO 15; MO 22

Turn left onto US 54 Business; MO 15; MO 22

Navigation decision point

5
91.2 mi into trip | ~1h 47m in | South Jefferson Street

At end of road, turn left onto South Jefferson Street

Navigation decision point

Towns Mentioned on Route Signs

Based on OSRM destination-sign hints, not a full list of every settlement the road passes.

On the drive from Saint Peters, MO to Mexico, MO, road signs begin pointing toward Fulton along the way.

Fulton

73.6 mi in | ~1h 25m

Main Roads

Road Distance Duration
I 70 73.6 mi 1h 25m
US 54 13.3 mi 14m
US 54 Business 3.8 mi 6m
High Street 0.1 mi <1m
South Jefferson Street <0.1 mi <1m
Longest stretch: I 70 — 73.6 mi, about 1h 25m

Turn-by-Turn Driving Directions

Step-by-step road directions between Saint Peters, MO and Mexico, 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 · 22 sec
Exit 148 Toward US 54: Auxvasse, Mexico, Fulton
3

Turn right onto US 54

13 mi · 14 min · US 54
4

Take the exit

0.2 mi · 33 sec
Toward US 54 Business, MO 15, MO 22: Mexico
5

Turn left onto US 54 Business; MO 15; MO 22

3.8 mi · 6 min · US 54 Business; MO 15; MO 22
6

Turn right onto High Street

0.1 mi · 33 sec · High Street
7

At end of road, turn left onto South Jefferson Street

167 ft · 7 sec · South Jefferson Street
8

Arrive at destination

South Jefferson Street

Trip Plan

Morning Departure

Leave by 9 AM and you'll arrive before lunch.

Evening Departure

Even a 4 PM departure gets you there before dark in summer.

You can normally do this drive in one day.
You may only need one short stretch break if traffic stays light.
The halfway point lands around 45.6 miles from Saint Peters, MO, or about 53m into the drive.
The longest continuous stretch on this route runs about 73.6 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 80 miles or 1h 32m in

Use this first pause for coffee, a restroom break, and a quick traffic check ahead.

Halfway reset

Around 45.6 miles or 53m in

This is the best place for your longest stop, a real meal, and a full fuel check.

Final approach

Final hour starts around 1h 27m

Traffic, exits, and arrival timing usually matter more near Mexico, 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 91.2 miles and 1h 47m.

Your first comfortable stop window is around 80 miles from Saint Peters, MO.
This route can stay practical as a one-day drive if traffic stays reasonable.
You may only need one short stretch stop if conditions stay smooth.
The longest stretch is on I 70 for about 73.6 miles.

Where to Stop

Rest stops, refuel points, and overnight suggestions along this route.

Halfway Point

Midpoint

About 45.6 mi from Saint Peters, MO · 53m into the drive

Downtown Quincy, IL, IL

Mid-route town

Meal stop

Quincy, IL

46 mi into the route

Best for: Lunch, fuel, and a longer reset

This sits close to the middle of the route, so it works well for the longest stop of the day.

Pacing Suggestions

Quincy, IL

Fuel and coffee

A short stop after about 80 miles helps settle the day before fatigue starts building.

Quincy, IL

Meal break

The midpoint is around 45.6 miles from Saint Peters, MO, which is a good place for a longer meal and fuel stop.

Before the longest stretch

Fuel check

Top up before I 70 if your tank is already low. That segment runs about 73.6 miles.

Arriving in Mexico, MO

The final approach into Mexico, MO usually feels slower than the middle of the drive, so avoid planning your tightest schedule at the very end.

Try to arrive with enough fuel left to skip an immediate station stop unless you already know the area around Mexico, MO.

These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.

National Parks Near This Route

Worth a detour if your schedule allows.

Gateway Arch National Park

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...

26 mi from route ~66 min detour $19
View on nps.gov

Park data from the National Park Service API. Alerts update every 2 hours.

Fuel & Cost

Regular Gas

$14.26 one way

$28.52 round trip

$3.97/gal 25.4 MPG avg 32 kg CO2
Fuel Type $/gal One Way Round Trip
midgrade $4.36 $15.65 $31.31
premium $4.89 $17.55 $35.10
diesel $5.61 $20.14 $40.27

No toll roads detected on this route.

Estimated Trip Cost (one way, 1 person)

Fuel

$14

Meals

$25–$50

Total

$39–$64

Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.

Estimated CO2 emission: 31.9 kg one way. Prices: EIA weekly data, 2026-04-13.

Driving Electric?

About $10 in charging · 0 stops · 66% less CO2

Vehicle Type kWh Stops DC Fast Home Charge
Average EV 27.4 0 $9.58 $4.38
Efficient EV 22.8 0 $7.98 $3.65
EV Truck/SUV 36.5 0 $12.77 $5.84

Gas CO2

32 kg

EV CO2

11 kg (66% 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 Apr 15, 2026

Origin

Saint Peters, MO

Afternoon in Saint Peters on Thursday

Local time

1:37 PM

CDT

Current temp

57°F

Unavailable

Live forecast

Destination

Mexico, MO

Afternoon in Mexico on Thursday

Local time

1:37 PM

CDT

Current temp

73°F

Unavailable

Live forecast

75°F

Quincy, IL

46 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

16 degrees warmer at arrival

A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.

Road read

1h 47m 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.

Frequently Asked Questions

The drive from Saint Peters, MO to Mexico, MO covers 91.2 miles and takes about 1h 47m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are I 70, US 54, US 54 Business. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 45.6 miles from Saint Peters, MO. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $14.26 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
Leave by 9 AM and you'll arrive before lunch. Even a 4 PM departure gets you there before dark in summer.
The drive from Saint Peters, MO to Mexico, MO is easy. At 1h 47m with 99% highway, most drivers will find it relaxed and low-stress.
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 87.1 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one.
On the drive from Saint Peters, MO to Mexico, MO, road signs begin pointing toward Fulton along the way.

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