How far is Mill Plain, WA from Federal Way, WA?
The driving distance from Mill Plain, WA to Federal Way, WA is about 149.5 miles (240.6 km), with a travel time of about 02h 38m by car.
- The straight-line flight distance is about 116.4 miles (187.3 km).
- For a round trip, plan for roughly 05h 17m 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 38m.
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 Lewis County, Washington, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Clear
Partly Cloudy
Driving Route Map
The map below follows the saved road route between Mill Plain and Federal Way.
Turn-by-Turn Driving Directions
Step-by-step road directions between Mill Plain and Federal Way.
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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
10 mi · 13 min
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19
Take the exit slight right toward Federal Way, South 320th Street
1774 ft · 51 sec
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20
Turn left onto South 320th Street
1.3 km · 2 min · South 320th Street
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21
Turn right onto Pacific Highway South
2617 ft · 55 sec · Pacific Highway South
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22
Turn right onto South 312th Street
48 m · 6 sec · South 312th Street
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23
Turn right
7 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 Federal Way.
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.
Mostly Clear leaving Mill Plain and Partly Cloudy near Federal Way.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Mill Plain to Federal Way?
The road trip is about 149.5 miles (240.6 km) and usually takes 02h 38m 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?
Napavine is a useful midpoint, sitting about 74.4 miles from Mill Plain and 75.1 miles from Federal Way.
How much longer is the road route than the straight-line distance?
The direct path is about 116.4 miles (187.3 km), while the road route adds roughly 33.1 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 1:12 PM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $27.63 one way or $55.26 round trip. Estimated CO2 is about 46.9 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Clear around Mill Plain and Partly Cloudy near Federal Way.
Stop Ideas Near Napavine
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 Napavine.
Centralia station
Centennial Station
Kelso Multimodal Transportation Center
Astoria Transit Center
Flight Path Map
This map shows the direct air route between Mill Plain and Federal Way. Straight-line distance: 116.36 mi (187.26 km).
#1 Mill Plain
Census designated place
| Population | 7,874 |
| Coordinates | 45.6429000, -122.4939800 |
| Altitude | 84 |
| Country | United States |
#2 Federal Way
A city in King County, Washington.
| Population | 96,307 |
| Coordinates | 47.3223200, -122.3126200 |
| Altitude | 141 |
| Country | United States |
End: (-122.312612, 47.32232)
Estimated Travel Time
Distance: 241 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 04h 58m |
| 40 mph (64.37 km/h) | 03h 44m |
| 50 mph (80.47 km/h) | 02h 59m |
| 60 mph (96.56 km/h) | 02h 29m |
| 70 mph (112.65 km/h) | 02h 08m |
| 80 mph (129 km/h) | 01h 51m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.23 | $27.63 | $55.26 |
| Mid-grade | $5.57 | $29.39 | $58.79 |
| Premium | $5.77 | $30.47 | $60.94 |
| Diesel | $5.47 | $28.87 | $57.73 |
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 30, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.