How far is Saint Peters, MO from Seymour, MO?
The driving distance from Saint Peters, MO to Seymour, MO is about 208.2 miles (335.1 km), with a travel time of about 04h 12m by car.
- The straight-line flight distance is about 163.3 miles (262.8 km).
- For a round trip, plan for roughly 08h 24m 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 04h 12m.
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.
Partly Sunny
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Saint Peters and Seymour.
Turn-by-Turn Driving Directions
Step-by-step road directions between Saint Peters and Seymour.
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1
Start on the route
3 mi · 4 min
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2
Take the exit slight right toward MO K: O'Fallon, Main Street
119 m · 8 sec
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3
Turn straight onto East Terra Lane
1.4 km · 2 min · East Terra Lane
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4
Turn slight left
19 m · 2 sec
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5
Continue straight
3.1 mi · 6 min
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6
Continue straight
3.4 mi · 5 min
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7
Take the ramp slight right toward I 64 East, US 40 East, US 61 South
1523 ft · 22 sec
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8
Merge slight left onto Avenue of the Saints
3.7 mi · 5 min · Avenue of the Saints
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9
Take the exit slight right toward Chesterfield Airport Road
2700 ft · 58 sec
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10
Continue on Chesterfield Airport Road
110 m · 7 sec · Chesterfield Airport Road
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11
Turn right onto Olive Street Road
64 m · 5 sec
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12
Turn right onto Olive Street Road
1.5 km · 2 min · Olive Street Road
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13
Continue on North Eatherton Road
2.4 mi · 5 min · North Eatherton Road
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14
Enter the roundabout and take exit 2 toward the route
21 m · 1 sec
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15
Exit the roundabout
4.3 mi · 7 min
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16
Enter the roundabout and take exit 2 toward the route
29 m · 2 sec
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17
Exit the roundabout
2098 ft · 45 sec
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18
Enter the roundabout and take exit 2 toward MO 100 West: Gray Summit
23 m · 2 sec
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19
Exit the roundabout onto MO 100 West: Gray Summit
1202 ft · 33 sec
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20
Merge slight left
13.3 mi · 19 min
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21
Take the exit slight right toward I 44 West, US 50 West: St. Clair
1157 ft · 14 sec
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22
Merge slight left
150.1 mi · 2 hr 41 min
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23
Take the exit slight right
1345 ft · 33 sec
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24
Enter the roundabout and take exit 4 toward the route
127 m · 9 sec
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25
Exit the roundabout
148 m · 10 sec
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26
Enter the roundabout and take exit 1 toward North Marshall Road
36 m · 3 sec · North Marshall Road
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27
Exit the roundabout onto North Marshall Road
1791 ft · 49 sec · North Marshall Road
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28
Continue on North Marshall Street
1.3 km · 2 min · North Marshall Street
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29
Turn left onto East Hubble Drive
1341 ft · 33 sec · East Hubble Drive
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30
Turn sharp right onto North Pine Street
1.4 km · 2 min · North Pine Street
-
31
Turn right onto Commercial Street
1266 ft · 32 sec · Commercial Street
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32
Turn left onto South Marshall Street
12.2 mi · 18 min · South Marshall Street
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33
At the end of the road, turn left
2456 ft · 2 min
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34
Continue on West Springfield Avenue
131 m · 21 sec · West Springfield Avenue
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35
Turn right onto North Diggins Main Street
74 m · 16 sec · North Diggins Main Street
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36
Turn left
4 mi · 5 min
-
37
Turn right
144 m · 9 sec
-
38
Turn straight onto West Clinton Avenue
1.1 mi · 2 min · West Clinton Avenue
-
39
Turn right onto North Main Street
1218 ft · 27 sec · North Main Street
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40
Turn right onto West Washington Street
50 m · 7 sec · West Washington Street
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41
Arrive at your destination
0 m · 1 sec · West Washington Street
Car Route Details
A richer read on the saved driving route between Saint Peters and Seymour.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
I 44 West
Merge slight left
150 mi · 02h 41m
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.
Partly Sunny leaving Saint Peters and Mostly Sunny near Seymour.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Saint Peters to Seymour?
The road trip is about 208.2 miles (335.1 km) and usually takes 04h 12m 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 104 miles from Saint Peters and 104.1 miles from Seymour.
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 44.9 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 8:36 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $27.72 one way or $55.43 round trip. Estimated CO2 is about 65.3 kg one way.
What should you check before leaving?
Before you leave, expect Partly Sunny around Saint Peters and Mostly Sunny near Seymour.
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 Saint Peters and Seymour. Straight-line distance: 163.31 mi (262.82 km).
#1 Saint Peters
The most populous city in St.
| Population | 58,043 |
| Coordinates | 38.8003300, -90.6265100 |
| Altitude | 134 |
| Country | United States |
#2 Seymour
City in Missouri, United States
| Population | 2,022 |
| Coordinates | 37.1464400, -92.7687800 |
| Altitude | 501 |
| Country | United States |
End: Seymour (-92.76878, 37.14644)
Estimated Travel Time
Distance: 335 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 06h 56m |
| 40 mph (64.37 km/h) | 05h 12m |
| 50 mph (80.47 km/h) | 04h 09m |
| 60 mph (96.56 km/h) | 03h 28m |
| 70 mph (112.65 km/h) | 02h 58m |
| 80 mph (129 km/h) | 02h 35m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $27.72 | $55.43 |
| Mid-grade | $4.25 | $31.26 | $62.52 |
| Premium | $4.65 | $34.21 | $68.41 |
| Diesel | $5.30 | $38.98 | $77.97 |
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.