How far is Renton, WA from Mill Plain, WA?
The driving distance from Renton, WA to Mill Plain, WA is about 162.6 miles (261.6 km), with a travel time of about 03h 16m by car.
- The straight-line flight distance is about 127.8 miles (205.7 km).
- For a round trip, plan for roughly 06h 32m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM PDT.
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 16m.
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 and county seat of Lewis County, Washington, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Light Rain Likely
Light Rain
Driving Route Map
The map below follows the saved road route between Renton and Mill Plain.
Turn-by-Turn Driving Directions
Step-by-step road directions between Renton and Mill Plain.
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1
Start on the route
19 m · 5 sec
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2
Turn left
22 m · 8 sec
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3
Turn left
30 m · 13 sec
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4
Turn left onto Rainier Avenue South
1.5 km · 2 min · Rainier Avenue South
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5
Continue on Valley Freeway
99 m · 7 sec · Valley Freeway
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6
Take the exit slight right toward I 405 South: Burien, Seattle, Tacoma
2264 ft · 48 sec
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7
Merge slight left
2 mi · 3 min
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8
Take the exit slight right toward I 5 South: Portland
1446 ft · 49 sec
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9
Merge slight left
20.3 mi · 25 min
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10
Keep slight right
126.2 mi · 2 hr 23 min
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11
Keep slight right to continue on I 205 South: Salem
4.2 mi · 6 min
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12
Take the exit slight right toward Padden Parkway, Northeast Andresen Road
1573 ft · 42 sec
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13
Turn left onto Northeast Padden Parkway
4 mi · 6 min · Northeast Padden Parkway
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14
Turn right onto Northeast 152nd Avenue
1201 ft · 31 sec · Northeast 152nd Avenue
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15
Continue on Northeast 78th Street
2568 ft · 1 min · Northeast 78th Street
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16
Turn right onto Northeast 162nd Avenue
2 mi · 4 min · Northeast 162nd Avenue
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17
Turn left onto Northeast 39th Street
2676 ft · 1 min · Northeast 39th Street
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18
Turn right onto Northeast 172nd Avenue
2266 ft · 1 min · Northeast 172nd Avenue
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19
Turn left onto Northeast 29th Street
61 m · 11 sec · Northeast 29th Street
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20
Turn right onto Northeast 173rd Court
104 m · 15 sec · Northeast 173rd Court
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21
Turn slight left
67 m · 16 sec
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22
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Renton and Mill Plain.
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 5 South
Keep slight right
126 mi · 02h 23m
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.
Light Rain Likely leaving Renton and Light Rain near Mill Plain.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Renton to Mill Plain?
The road trip is about 162.6 miles (261.6 km) and usually takes 03h 16m 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?
Chehalis is a useful midpoint, sitting about 81.2 miles from Renton and 81.3 miles from Mill Plain.
How much longer is the road route than the straight-line distance?
The direct path is about 127.8 miles (205.7 km), while the road route adds roughly 34.8 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 6:00 AM to 8:00 AM PDT. If you want a more comfortable same-day return, try to leave by 10:28 AM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $30.04 one way or $60.07 round trip. Estimated CO2 is about 51 kg one way.
What should you check before leaving?
Before you leave, expect Light Rain Likely around Renton and Light Rain near Mill Plain.
Stop Ideas Near Chehalis
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 Chehalis.
Centralia station
Centennial Station
Kelso Multimodal Transportation Center
Tacoma Dome Station
Flight Path Map
This map shows the direct air route between Renton and Mill Plain. Straight-line distance: 127.81 mi (205.69 km).
#1 Renton
The second most populous city in King County, Washington.
| Population | 101,494 |
| Coordinates | 47.4828800, -122.2170700 |
| Altitude | 12 |
| Country | United States |
#2 Mill Plain
Census designated place
| Population | 7,874 |
| Coordinates | 45.6429000, -122.4939800 |
| Altitude | 84 |
| Country | United States |
End: Mill Plain (-122.49398, 45.6429)
Estimated Travel Time
Distance: 262 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 05h 24m |
| 40 mph (64.37 km/h) | 04h 03m |
| 50 mph (80.47 km/h) | 03h 15m |
| 60 mph (96.56 km/h) | 02h 42m |
| 70 mph (112.65 km/h) | 02h 19m |
| 80 mph (129 km/h) | 02h 01m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.23 | $30.04 | $60.07 |
| Mid-grade | $5.57 | $31.95 | $63.91 |
| Premium | $5.77 | $33.13 | $66.25 |
| Diesel | $5.47 | $31.38 | $62.76 |
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 Washington · 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.