How far is Stillwater, OK from Duncan, OK?
The driving distance from Stillwater, OK to Duncan, OK is about 144 miles (231.7 km), with a travel time of about 02h 49m by car.
- The straight-line flight distance is about 122.5 miles (197.1 km).
- For a round trip, plan for roughly 05h 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 02h 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.
Human settlement in Oklahoma County, Oklahoma, United States of America
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Cloudy then Slight Chance Showers And Thunderstorms
Mostly Cloudy
Driving Route Map
The map below follows the saved road route between Stillwater and Duncan.
Turn-by-Turn Driving Directions
Step-by-step road directions between Stillwater and Duncan.
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1
Start on East 6th Avenue
2074 ft · 1 min · East 6th Avenue
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2
Turn right onto South Perkins Road
8.9 mi · 12 min · South Perkins Road
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3
Turn right
770 ft · 16 sec
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4
Turn right onto Jennifer Lea Briggs and Heather Wilson Memorial Highway
10.3 mi · 12 min · Jennifer Lea Briggs and Heather Wilson Memorial Highway
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5
Continue on Newt Sexton Memorial Bridge
1764 ft · 23 sec · Newt Sexton Memorial Bridge
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6
Continue on Sammy Davis, Junior Drive
11.6 mi · 13 min · Sammy Davis, Junior Drive
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7
Turn left
2453 ft · 1 min
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8
Merge slight left onto World War II Veterans Memorial Highway
14.5 mi · 15 min · World War II Veterans Memorial Highway
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9
Continue on Shannon Miller Parkway
4.1 mi · 5 min · Shannon Miller Parkway
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10
Continue on World War II Veterans Memorial Highway
5 mi · 5 min · World War II Veterans Memorial Highway
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11
Keep slight right to continue on Will Rogers Expressway
15.6 mi · 19 min · Will Rogers Expressway
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12
Keep slight right to continue on Will Rogers Expressway
7.9 mi · 9 min · Will Rogers Expressway
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13
Continue on Harry E. Bailey Turnpike
26.6 mi · 25 min · Harry E. Bailey Turnpike
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14
Take the exit slight right toward US 81, US 277: Duncan, Chickasha
1658 ft · 49 sec
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15
Turn left onto US 81 South, US 277 South: Duncan
11.8 mi · 15 min
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16
Continue straight
22.9 mi · 30 min
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17
Continue straight
2867 ft · 52 sec
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18
Continue straight
627 ft · 11 sec
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19
Continue straight
2909 ft · 55 sec
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20
Continue straight
1659 ft · 28 sec
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21
Continue straight
1.5 km · 2 min
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22
Turn left onto West Main Street
3031 ft · 1 min · West Main Street
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23
Turn left onto North 9th Street
47 m · 7 sec · North 9th Street
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24
Arrive at your destination
0 m · 1 sec · North 9th Street
Car Route Details
A richer read on the saved driving route between Stillwater and Duncan.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Harry E. Bailey Turnpike
Continue on Harry E. Bailey Turnpike
26.6 mi · 00h 25m
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.
Mostly Cloudy then Slight Chance Showers And Thunderstorms leaving Stillwater and Mostly Cloudy near Duncan.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Stillwater to Duncan?
The road trip is about 144 miles (231.7 km) and usually takes 02h 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?
Valley Brook is a useful midpoint, sitting about 72 miles from Stillwater and 71.9 miles from Duncan.
How much longer is the road route than the straight-line distance?
The direct path is about 122.5 miles (197.1 km), while the road route adds roughly 21.5 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 12:52 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $19.24 one way or $38.48 round trip. Estimated CO2 is about 45.1 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Cloudy then Slight Chance Showers And Thunderstorms around Stillwater and Mostly Cloudy near Duncan.
Stop Ideas Near Valley Brook
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 Valley Brook.
Santa Fe Depot
Norman
Purcell
Guthrie, OK
Flight Path Map
This map shows the direct air route between Stillwater and Duncan. Straight-line distance: 122.46 mi (197.08 km).
#1 Stillwater
The most populous city in Payne County, Oklahoma.
| Population | 50,306 |
| Coordinates | 36.1156100, -97.0583700 |
| Altitude | 273 |
| Country | United States |
#2 Duncan
City in Oklahoma
| Population | 22,259 |
| Coordinates | 34.5023000, -97.9578100 |
| Altitude | 342 |
| Country | United States |
End: Duncan (-97.95781, 34.5023)
Estimated Travel Time
Distance: 232 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 04h 47m |
| 40 mph (64.37 km/h) | 03h 35m |
| 50 mph (80.47 km/h) | 02h 52m |
| 60 mph (96.56 km/h) | 02h 23m |
| 70 mph (112.65 km/h) | 02h 03m |
| 80 mph (129 km/h) | 01h 47m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.79 | $19.24 | $38.48 |
| Mid-grade | $4.26 | $21.64 | $43.27 |
| Premium | $4.63 | $23.50 | $46.99 |
| Diesel | $5.42 | $27.51 | $55.02 |
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 Oklahoma · Apr 23, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.