How far is Mill Plain, WA from Seattle, WA?
The driving distance from Mill Plain, WA to Seattle, WA is about 170.1 miles (273.7 km), with a travel time of about 02h 58m by car.
- The straight-line flight distance is about 135.9 miles (218.7 km).
- For a round trip, plan for roughly 05h 56m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM PDT.
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 58m.
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.
City in Washington State
Route Weather Snapshot
Check the forecast at both ends before you head out.
Light Rain
Light Rain Likely
Driving Route Map
The map below follows the saved road route between Mill Plain and Seattle.
Turn-by-Turn Driving Directions
Step-by-step road directions between Mill Plain and Seattle.
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1
Start on the route
559 ft · 36 sec
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2
Turn left onto Northeast 29th Street
61 m · 11 sec · Northeast 29th Street
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3
Turn right onto Northeast 172nd Avenue
2266 ft · 1 min · Northeast 172nd Avenue
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4
Turn left onto Northeast 39th Street
1.8 mi · 4 min · Northeast 39th Street
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5
Enter the roundabout and take exit 1 toward Northeast 137th Avenue
5 m · 1 sec · Northeast 137th Avenue
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6
Exit the roundabout onto Northeast 137th Avenue
1201 ft · 29 sec · Northeast 137th Avenue
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7
Enter the roundabout and take exit 2 toward Northeast 137th Avenue
29 m · 2 sec · Northeast 137th Avenue
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8
Exit the roundabout onto Northeast 137th Avenue
1247 ft · 31 sec · Northeast 137th Avenue
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9
Enter the roundabout and take exit 3 toward Northeast 49th Street
64 m · 4 sec · Northeast 49th Street
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10
Exit the roundabout onto Northeast 49th Street
1.3 mi · 3 min · Northeast 49th Street
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11
At the end of the road, turn right onto Northeast 112th Avenue
1683 ft · 37 sec · Northeast 112th Avenue
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12
Continue on Northeast Gher Road
30 m · 9 sec · Northeast Gher Road
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13
Turn left onto WA 500 West
1089 ft · 27 sec
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14
Merge slight left
774 ft · 12 sec
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15
Take the exit slight right toward I 205 North: Seattle
1.2 km · 1 min
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16
Merge slight left
6.1 mi · 8 min
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17
Merge slight left
125.5 mi · 2 hr 22 min
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18
Keep slight right
31.9 mi · 40 min
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19
Take the exit slight left toward Seneca Street
1359 ft · 36 sec
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20
Turn left onto Seneca Street
98 m · 18 sec · Seneca Street
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21
Turn left onto 5th Avenue
615 ft · 27 sec · 5th Avenue
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22
Turn right onto Madison Street
34 m · 9 sec · Madison Street
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23
Turn left
9 m · 2 sec
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24
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Mill Plain and Seattle.
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 205 North
Merge slight left
126 mi · 02h 22m
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.
Light Rain leaving Mill Plain and Light Rain Likely near Seattle.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Mill Plain to Seattle?
The road trip is about 170.1 miles (273.7 km) and usually takes 02h 58m 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?
Centralia is a useful midpoint, sitting about 84.7 miles from Mill Plain and 85.4 miles from Seattle.
How much longer is the road route than the straight-line distance?
The direct path is about 135.9 miles (218.7 km), while the road route adds roughly 34.2 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 8:00 AM to 10:00 AM PDT. If you want a more comfortable same-day return, try to leave by 12:34 PM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $31.40 one way or $62.80 round trip. Estimated CO2 is about 53.3 kg one way.
What should you check before leaving?
Before you leave, expect Light Rain around Mill Plain and Light Rain Likely near Seattle.
Stop Ideas Near Centralia
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 Centralia.
Centralia station
Centennial Station
Kelso Multimodal Transportation Center
Tacoma Dome Station
Flight Path Map
This map shows the direct air route between Mill Plain and Seattle. Straight-line distance: 135.87 mi (218.66 km).
#1 Mill Plain
Census designated place
| Population | 7,874 |
| Coordinates | 45.6429000, -122.4939800 |
| Altitude | 84 |
| Country | United States |
#2 Seattle
The eighteenth most populous city in the United States and the center of the Seattle metropolitan area.
| Population | 769,714 |
| Coordinates | 47.6062100, -122.3320700 |
| Altitude | 56 |
| Country | United States |
End: (-122.332143, 47.606309)
Estimated Travel Time
Distance: 274 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 05h 39m |
| 40 mph (64.37 km/h) | 04h 15m |
| 50 mph (80.47 km/h) | 03h 24m |
| 60 mph (96.56 km/h) | 02h 50m |
| 70 mph (112.65 km/h) | 02h 25m |
| 80 mph (129 km/h) | 02h 07m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.23 | $31.40 | $62.80 |
| Mid-grade | $5.57 | $33.40 | $66.80 |
| Premium | $5.77 | $34.63 | $69.25 |
| Diesel | $5.47 | $32.80 | $65.60 |
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.