How far is Seymour, MO from Saint Peters, MO?
The driving distance from Seymour, MO to Saint Peters, MO is about 220.7 miles (355.2 km), with a travel time of about 03h 28m by car.
- The straight-line flight distance is about 163.3 miles (262.8 km).
- For a round trip, plan for roughly 06h 57m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM CDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
Flight Distance
Driving Distance
Gas Cost Calculator
Leave and Arrive Planner
Pick a departure time to see your estimated arrival and same-day return window.
Drive time stays fixed at 03h 28m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
You are leaving earlier than the recommended window, which gives you extra margin for breaks and traffic.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
City in Phelps County, Missouri, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Partly Sunny
Driving Route Map
The map below follows the saved road route between Seymour and Saint Peters.
Turn-by-Turn Driving Directions
Step-by-step road directions between Seymour and Saint Peters.
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1
Start on West Washington Street
50 m · 13 sec · West Washington Street
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2
Turn left onto South Main Street
1218 ft · 30 sec · South Main Street
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3
Turn left onto West Clinton Avenue
1.1 mi · 2 min · West Clinton Avenue
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4
Continue on West Steel Street
597 ft · 19 sec · West Steel Street
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5
Turn left
4 mi · 5 min
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6
Turn right onto North Diggins Main Street
34 m · 11 sec · North Diggins Main Street
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7
Turn left onto West Springfield Avenue
131 m · 19 sec · West Springfield Avenue
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8
Continue straight
2456 ft · 2 min
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9
Turn right
12.2 mi · 18 min
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10
Turn right onto Commercial Street
1266 ft · 33 sec · Commercial Street
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11
Turn left onto South Pine Street
1.4 km · 2 min · South Pine Street
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12
Turn sharp left onto East Hubble Drive
1341 ft · 29 sec · East Hubble Drive
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13
Turn right onto North Marshall Street
1.3 km · 2 min · North Marshall Street
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14
Continue on North Marshall Road
1806 ft · 50 sec · North Marshall Road
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15
Enter the roundabout and take exit 2 toward the route
40 m · 3 sec
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16
Exit the roundabout
1124 ft · 28 sec
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17
Merge slight left
150 mi · 2 hr 42 min
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18
Take the exit slight right toward I 44 Business, MO 100 East: Gray Summit
970 ft · 28 sec
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19
Turn left onto Manchester Road
13.4 mi · 19 min · Manchester Road
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20
Take the exit slight right toward MO 109
1108 ft · 31 sec
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21
Enter the roundabout and take exit 3 toward the route
68 m · 4 sec
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22
Exit the roundabout
157 m · 11 sec
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23
Enter the roundabout and take exit 1 toward the route
30 m · 2 sec
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24
Exit the roundabout
2129 ft · 45 sec
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25
Enter the roundabout and take exit 2 toward the route
29 m · 2 sec
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26
Exit the roundabout
4.3 mi · 7 min
-
27
Enter the roundabout and take exit 2 toward South Eatherton Road
29 m · 1 sec · South Eatherton Road
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28
Exit the roundabout onto South Eatherton Road
2.4 mi · 5 min · South Eatherton Road
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29
Continue on Olive Street Road
1.5 km · 2 min · Olive Street Road
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30
Take the ramp left toward Chesterfield Airport Road
1.1 km · 1 min · Chesterfield Airport Road
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31
Merge slight left onto Avenue of the Saints
2.7 mi · 3 min · Avenue of the Saints
-
32
Take the exit slight right toward MO 94: Defiance, Saint Charles
1013 ft · 16 sec
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33
Keep slight right to continue on MO 94 East: Saint Charles
95 m · 5 sec
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34
Merge slight left
3.4 mi · 5 min
-
35
Keep slight right to continue on Mid Rivers Mall Drive, Pitman Hill Road
1056 ft · 22 sec
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36
Turn left onto Mid Rivers Mall Drive
4.7 mi · 10 min · Mid Rivers Mall Drive
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37
Take the ramp straight toward I 70 West: Wentzville
1419 ft · 20 sec
-
38
Merge slight left
146 m · 7 sec
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39
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Seymour and Saint Peters.
Interchange-aware route
The drive includes several ramps, exits, or merges, so checking the next few maneuvers before busy interchanges is useful.
North Marshall Road
Merge slight left
150 mi · 02h 42m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Mostly Sunny leaving Seymour and Partly Sunny near Saint Peters.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Seymour to Saint Peters?
The road trip is about 220.7 miles (355.2 km) and usually takes 03h 28m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
Rolla is a useful midpoint, sitting about 102.7 miles from Seymour and 118.1 miles from Saint Peters.
How much longer is the road route than the straight-line distance?
The direct path is about 163.3 miles (262.8 km), while the road route adds roughly 57.4 extra miles because roads do not follow the straight air line.
When is the best time to leave for this route?
A good departure window is usually 6:00 AM to 8:00 AM CDT. If you want a more comfortable same-day return, try to leave by 10:02 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $29.38 one way or $58.75 round trip. Estimated CO2 is about 69.2 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Seymour and Partly Sunny near Saint Peters.
Stop Ideas Near Rolla
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Rolla.
Jefferson City
Hermann
Washington
Flight Path Map
This map shows the direct air route between Seymour and Saint Peters. Straight-line distance: 163.31 mi (262.82 km).
#1 Seymour
City in Missouri, United States
| Population | 2,022 |
| Coordinates | 37.1464400, -92.7687800 |
| Altitude | 501 |
| Country | United States |
#2 Saint Peters
The most populous city in St.
| Population | 58,043 |
| Coordinates | 38.8003300, -90.6265100 |
| Altitude | 134 |
| Country | United States |
End: I 70 West (-90.626511, 38.800311)
Estimated Travel Time
Distance: 355 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 07h 21m |
| 40 mph (64.37 km/h) | 05h 31m |
| 50 mph (80.47 km/h) | 04h 24m |
| 60 mph (96.56 km/h) | 03h 40m |
| 70 mph (112.65 km/h) | 03h 09m |
| 80 mph (129 km/h) | 02h 45m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $29.38 | $58.75 |
| Mid-grade | $4.25 | $33.13 | $66.26 |
| Premium | $4.65 | $36.25 | $72.51 |
| Diesel | $5.30 | $41.32 | $82.64 |
Assumes 8.3 L/100 km (about 28.3 MPG). CO2 is an estimate and varies by vehicle, fuel blend, traffic, and terrain.
Prices in Missouri · May 25, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.