How far is Overland Park, KS from Saint Marys, KS?
The driving distance from Overland Park, KS to Saint Marys, KS is about 92.3 miles (148.6 km), with a travel time of about 01h 49m by car.
- The straight-line flight distance is about 76.5 miles (123.1 km).
- For a round trip, plan for roughly 03h 38m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM CDT.
Reverse, save, or send this route
This route works well as a day trip with time at the destination. Copy the route link, send it to another device, or print a clean version before you head out.
This route works well as a day trip with time at the destination.
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 01h 49m.
A morning start gives you useful time at the destination and keeps the return out of the late evening.
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.
Township in Douglas County, Kansas
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Sunny
Driving Route Map
The map below follows the saved road route between Overland Park and Saint Marys.
Turn-by-Turn Driving Directions
Step-by-step road directions between Overland Park and Saint Marys.
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1
Start on the route
41 m · 14 sec
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2
Turn right onto West 81st Street
56 m · 13 sec · West 81st Street
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3
Turn left onto Marty Street
147 m · 23 sec · Marty Street
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4
Turn right onto West 80th Street
662 ft · 36 sec · West 80th Street
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5
Turn left onto Metcalf Avenue
3.8 mi · 7 min · Metcalf Avenue
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6
Keep slight left to continue on Harry Darby Memorial Highway
4.7 mi · 6 min · Harry Darby Memorial Highway
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7
Take the exit slight left toward I 70 West: Topeka
1475 ft · 42 sec
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8
Merge slight right onto Kansas Turnpike
50.8 mi · 52 min · Kansas Turnpike
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9
Keep slight right to continue on Kansas Turnpike
1.5 km · 1 min · Kansas Turnpike
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10
Continue on Truman/Eisenhower Presidential Highway
8.4 mi · 10 min · Truman/Eisenhower Presidential Highway
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11
Take the exit slight right toward US 75 North: Holton
1443 ft · 35 sec
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12
Continue on Addy Westgate Memorial Bridge
1.6 mi · 2 min · Addy Westgate Memorial Bridge
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13
Take the exit slight right toward US 24 West: Manhattan
1194 ft · 29 sec
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14
Merge slight left
21 mi · 29 min
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15
Turn right onto North 6th Street
7 m · 1 sec · North 6th Street
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16
Arrive at your destination
0 m · 1 sec · North 6th Street
Car Route Details
A richer read on the saved driving route between Overland Park and Saint Marys.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Kansas Turnpike
Merge slight right onto Kansas Turnpike
50.8 mi · 00h 52m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A comfortable day-trip route
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
Sunny leaving Overland Park and Sunny near Saint Marys.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Overland Park to Saint Marys?
The road trip is about 92.3 miles (148.6 km) and usually takes 01h 49m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
What is the halfway point on this route?
Kanwaka is a useful midpoint, sitting about 46.1 miles from Overland Park and 46.2 miles from Saint Marys.
How much longer is the road route than the straight-line distance?
The direct path is about 76.5 miles (123.1 km), while the road route adds roughly 15.8 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 8:00 AM to 10:00 AM CDT. If you want a more comfortable same-day return, try to leave by 2:52 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $12.29 one way or $24.59 round trip. Estimated CO2 is about 29 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Overland Park and Sunny near Saint Marys.
Stop Ideas Near Kanwaka
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 Kanwaka.
Lawrence
Topeka
Union Station
Independence
Flight Path Map
This map shows the direct air route between Overland Park and Saint Marys. Straight-line distance: 76.51 mi (123.13 km).
#1 Overland Park
The second most populous city in Johnson County, Kansas.
| Population | 197,381 |
| Coordinates | 38.9822300, -94.6707900 |
| Altitude | 329 |
| Country | United States |
#2 Saint Marys
City in Pottawatomie and Wabaunsee couties in Kansas, United States
| Population | 2,652 |
| Coordinates | 39.1941600, -96.0711000 |
| Altitude | 291 |
| Country | United States |
End: Saint Marys (-96.0711, 39.19416)
Estimated Travel Time
Distance: 149 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 03h 04m |
| 40 mph (64.37 km/h) | 02h 18m |
| 50 mph (80.47 km/h) | 01h 50m |
| 60 mph (96.56 km/h) | 01h 32m |
| 70 mph (112.65 km/h) | 01h 19m |
| 80 mph (129 km/h) | 01h 09m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $12.29 | $24.59 |
| Mid-grade | $4.25 | $13.86 | $27.73 |
| Premium | $4.65 | $15.17 | $30.34 |
| Diesel | $5.30 | $17.29 | $34.58 |
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 Kansas · Apr 19, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.