How far is Derby, KS from Saint Marys, KS?
The driving distance from Derby, KS to Saint Marys, KS is about 168.3 miles (270.9 km), with a travel time of about 03h 05m by car.
- The straight-line flight distance is about 131.1 miles (211 km).
- For a round trip, plan for roughly 06h 10m 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 05m.
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.
Human settlement in United States of America
Route Weather Snapshot
Check the forecast at both ends before you head out.
Slight Chance Showers And Thunderstorms
Partly Sunny
Driving Route Map
The map below follows the saved road route between Derby and Saint Marys.
Turn-by-Turn Driving Directions
Step-by-step road directions between Derby and Saint Marys.
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1
Start on the route
37 m · 11 sec
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2
Turn right onto East Main Street
83 m · 14 sec · East Main Street
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3
Turn right onto North Baltimore Avenue
2237 ft · 40 sec · North Baltimore Avenue
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4
Continue on South Southeast Boulevard
5.1 mi · 8 min · South Southeast Boulevard
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5
Turn right onto Turnpike Drive
1210 ft · 26 sec · Turnpike Drive
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6
Take the ramp left
160 m · 13 sec
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7
Keep slight right to continue on I 35 North: El Dorado, Kansas City, Kansas Turnpike
927 ft · 23 sec
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8
Merge slight left onto Kansas Turnpike
81.9 mi · 1 hr 22 min · Kansas Turnpike
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9
Keep slight left to continue on Kansas Turnpike
50 mi · 50 min · Kansas Turnpike
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10
Take the exit slight right toward I 470 West, US 75: Topeka, Salina
2632 ft · 1 min
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11
Continue on Dr. Martin Luther King Jr. Memorial Highway
5.3 mi · 6 min · Dr. Martin Luther King Jr. Memorial Highway
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12
Take the exit slight right toward Wanamaker Road, Huntoon Street
1298 ft · 32 sec
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13
Keep slight right
50 m · 5 sec
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14
Turn straight onto Southwest Wanamaker Road
1.3 km · 2 min · Southwest Wanamaker Road
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15
Take the ramp slight right toward I 70 West: Salina
1255 ft · 42 sec
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16
Merge slight left onto Truman/Eisenhower Presidential Highway
9.9 mi · 10 min · Truman/Eisenhower Presidential Highway
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17
Take the exit slight right toward Carlson Road
1033 ft · 27 sec
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18
Turn right onto Northwest Carlson Road
2.3 mi · 3 min · Northwest Carlson Road
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19
Continue on Wabaunsee Street
1 km · 2 min · Wabaunsee Street
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20
Continue on Northwest Carlson Road
1.5 mi · 4 min · Northwest Carlson Road
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21
Continue on Northwest 42nd Terrace
1407 ft · 39 sec · Northwest 42nd Terrace
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22
Continue on Northwest Rossville Road
3178 ft · 1 min · Northwest Rossville Road
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23
Continue on Main Street
1389 ft · 41 sec · Main Street
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24
Turn left
7.6 mi · 11 min
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25
Turn right onto North 6th Street
7 m · 1 sec · North 6th Street
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26
Arrive at your destination
0 m · 1 sec · North 6th Street
Car Route Details
A richer read on the saved driving route between Derby 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 left onto Kansas Turnpike
81.9 mi · 01h 22m
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.
Slight Chance Showers And Thunderstorms leaving Derby and Partly Sunny near Saint Marys.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Derby to Saint Marys?
The road trip is about 168.3 miles (270.9 km) and usually takes 03h 05m 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?
Plymouth is a useful midpoint, sitting about 84.1 miles from Derby and 84.2 miles from Saint Marys.
How much longer is the road route than the straight-line distance?
The direct path is about 131.1 miles (211 km), while the road route adds roughly 37.2 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 10:50 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $22.40 one way or $44.80 round trip. Estimated CO2 is about 52.8 kg one way.
What should you check before leaving?
Before you leave, expect Slight Chance Showers And Thunderstorms around Derby and Partly Sunny near Saint Marys.
Stop Ideas Near Plymouth
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 Plymouth.
Topeka
Newton
Lawrence
Flight Path Map
This map shows the direct air route between Derby and Saint Marys. Straight-line distance: 131.09 mi (210.97 km).
#1 Derby
City in Sedgwick County, Kansas, United States
| Population | 25,145 |
| Coordinates | 37.5455700, -97.2689300 |
| Altitude | 394 |
| 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: 271 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 05h 36m |
| 40 mph (64.37 km/h) | 04h 12m |
| 50 mph (80.47 km/h) | 03h 21m |
| 60 mph (96.56 km/h) | 02h 48m |
| 70 mph (112.65 km/h) | 02h 24m |
| 80 mph (129 km/h) | 02h 05m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $22.40 | $44.80 |
| Mid-grade | $4.25 | $25.26 | $50.53 |
| Premium | $4.65 | $27.64 | $55.29 |
| Diesel | $5.30 | $31.51 | $63.01 |
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 · Jun 03, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.