How far is Grand Coulee, WA from Federal Way, WA?
The driving distance from Grand Coulee, WA to Federal Way, WA is about 234.4 miles (377.3 km), with a travel time of about 04h 04m by car.
- The straight-line flight distance is about 159.9 miles (257.3 km).
- For a round trip, plan for roughly 08h 08m 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 04h 04m.
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 Kittitas County, Washington, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Chance Light Rain
Chance Light Rain
Driving Route Map
The map below follows the saved road route between Grand Coulee and Federal Way.
Turn-by-Turn Driving Directions
Step-by-step road directions between Grand Coulee and Federal Way.
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1
Start on Spokane Way
43 m · 5 sec · Spokane Way
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2
Turn right onto Main Street
50 m · 5 sec · Main Street
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3
Turn left onto Midway Avenue
1553 ft · 44 sec · Midway Avenue
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4
Continue on Midway Avenue
78 m · 7 sec · Midway Avenue
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5
Continue on Grand Coulee Avenue
2795 ft · 57 sec · Grand Coulee Avenue
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6
Continue on Coulee Boulevard
25.1 mi · 33 min · Coulee Boulevard
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7
Continue on Coulee Corridor / Sunset Highway
4.3 mi · 6 min · Coulee Corridor / Sunset Highway
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8
Turn left onto Coulee Corridor
21.3 mi · 29 min · Coulee Corridor
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9
Turn right
3.7 mi · 5 min
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10
Turn left onto Alder Street Northwest
1.6 mi · 3 min · Alder Street Northwest
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11
Continue on Alder Street Southwest
2032 ft · 57 sec · Alder Street Southwest
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12
Turn right onto 5th Avenue Southwest
120 m · 16 sec · 5th Avenue Southwest
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13
Turn left onto Basin Street Southwest
19.9 mi · 27 min · Basin Street Southwest
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14
Take the ramp straight toward I 90 West: Seattle
1838 ft · 45 sec
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15
Merge slight left
125.7 mi · 2 hr 17 min
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16
Take the exit slight right toward WA 18 West: Auburn
1248 ft · 30 sec
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17
Keep slight left to continue on SR 18 west, Snoqualmie Parkway: Auburn, Tacoma
137 m · 13 sec
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18
Merge slight right onto Snoqualmie Parkway
1780 ft · 25 sec · Snoqualmie Parkway
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19
Continue on State Route 18
24.2 mi · 31 min · State Route 18
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20
Take the exit slight right toward WA 167: Renton, Puyallup
1109 ft · 19 sec
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21
Keep slight left to continue on WA 167 South: Puyallup, West Valley Highway
1523 ft · 26 sec
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22
Keep slight left to continue on West Valley Highway
762 ft · 24 sec
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23
At the end of the road, turn left onto West Valley Highway North
736 ft · 20 sec · West Valley Highway North
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24
Turn right onto South Peasley Canyon Road
1.2 km · 1 min · South Peasley Canyon Road
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25
Enter the roundabout and take exit 1 toward South Peasley Canyon Road
21 m · 2 sec · South Peasley Canyon Road
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26
Exit the roundabout onto South Peasley Canyon Road
1 mi · 2 min · South Peasley Canyon Road
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27
Continue on South 320th Street
1.4 mi · 3 min · South 320th Street
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28
Turn right onto Pacific Highway South
2617 ft · 55 sec · Pacific Highway South
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29
Turn right onto South 312th Street
48 m · 6 sec · South 312th Street
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30
Turn right
7 m · 2 sec
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31
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Grand Coulee 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 90 West
Merge slight left
126 mi · 02h 17m
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.
Chance Light Rain leaving Grand Coulee and Chance Light Rain near Federal Way.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Grand Coulee to Federal Way?
The road trip is about 234.4 miles (377.3 km) and usually takes 04h 04m 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?
Kittitas is a useful midpoint, sitting about 116.3 miles from Grand Coulee and 118.2 miles from Federal Way.
How much longer is the road route than the straight-line distance?
The direct path is about 159.9 miles (257.3 km), while the road route adds roughly 74.5 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 6:00 AM to 8:00 AM PDT. If you want a more comfortable same-day return, try to leave by 8:52 AM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $43.28 one way or $86.55 round trip. Estimated CO2 is about 73.5 kg one way.
What should you check before leaving?
Before you leave, expect Chance Light Rain around Grand Coulee and Chance Light Rain near Federal Way.
Stop Ideas Near Kittitas
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 Kittitas.
Columbia Station
Quincy, Washington
Leavenworth, Washington
Leavenworth
Flight Path Map
This map shows the direct air route between Grand Coulee and Federal Way. Straight-line distance: 159.9 mi (257.33 km).
#1 Grand Coulee
City in Grant County, Washington, United States
| Population | 1,050 |
| Coordinates | 47.9415400, -119.0033500 |
| Altitude | 452 |
| 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: 377 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 07h 48m |
| 40 mph (64.37 km/h) | 05h 51m |
| 50 mph (80.47 km/h) | 04h 41m |
| 60 mph (96.56 km/h) | 03h 54m |
| 70 mph (112.65 km/h) | 03h 20m |
| 80 mph (129 km/h) | 02h 55m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.23 | $43.28 | $86.55 |
| Mid-grade | $5.57 | $46.04 | $92.08 |
| Premium | $5.77 | $47.73 | $95.45 |
| Diesel | $5.47 | $45.21 | $90.42 |
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 19, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.