How far is Cosmopolis, WA from Spokane Valley, WA?
The driving distance from Cosmopolis, WA to Spokane Valley, WA is about 376.2 miles (605.5 km), with a travel time of about 06h 07m by car.
- The straight-line flight distance is about 310 miles (498.9 km).
- For a round trip, plan for roughly 12h 14m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 7:30 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 06h 07m.
Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
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.
Partly Sunny
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Cosmopolis and Spokane Valley.
Turn-by-Turn Driving Directions
Step-by-step road directions between Cosmopolis and Spokane Valley.
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1
Start on 3rd Street
7 m · 3 sec · 3rd Street
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2
Turn right onto F Street
655 ft · 28 sec · F Street
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3
Turn right onto 1st Street
4.1 mi · 7 min · 1st Street
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4
Turn left onto State Route 107
7 mi · 12 min · State Route 107
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5
Continue on South Main Street
1.3 km · 1 min · South Main Street
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6
Take the ramp right
1923 ft · 53 sec
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7
Merge slight left onto Olympic Highway
10.1 mi · 13 min · Olympic Highway
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8
Continue straight
21.1 mi · 26 min
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9
Merge slight left
5.4 mi · 7 min
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10
Keep slight left
2818 ft · 53 sec
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11
Merge slight left
28.8 mi · 36 min
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12
Keep slight right
8.2 mi · 10 min
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13
Take the exit slight right toward WA 18 East: Auburn, Muckleshoot Reservation
2644 ft · 1 min
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14
Merge slight left onto State Route 18
27.3 mi · 35 min · State Route 18
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15
Continue on Snoqualmie Parkway
656 ft · 8 sec · Snoqualmie Parkway
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16
Take the exit slight right toward I 90 East: Spokane
3019 ft · 1 min
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17
Merge slight left
251.7 mi · 4 hr 32 min
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18
Merge slight right
11.3 mi · 14 min
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19
Take the exit slight right toward WA 27
2039 ft · 52 sec
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20
Turn left onto North Pines Road
45 m · 11 sec · North Pines Road
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21
Arrive at your destination
0 m · 1 sec · North Pines Road
Car Route Details
A richer read on the saved driving route between Cosmopolis and Spokane Valley.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
I 90 East
Merge slight left
252 mi · 04h 32m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
Better with a longer stop
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
Partly Sunny leaving Cosmopolis and Mostly Sunny near Spokane Valley.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Cosmopolis to Spokane Valley?
The road trip is about 376.2 miles (605.5 km) and usually takes 06h 07m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
What is the halfway point on this route?
Ellensburg is a useful midpoint, sitting about 188.8 miles from Cosmopolis and 187.3 miles from Spokane Valley.
How much longer is the road route than the straight-line distance?
The direct path is about 310 miles (498.9 km), while the road route adds roughly 66.2 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 6:00 AM to 7:30 AM PDT. Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $69.44 one way or $138.88 round trip. Estimated CO2 is about 117.9 kg one way.
What should you check before leaving?
Before you leave, expect Partly Sunny around Cosmopolis and Mostly Sunny near Spokane Valley.
Stop Ideas Near Ellensburg
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 Ellensburg.
Columbia Station
Quincy, Washington
Leavenworth, Washington
Leavenworth
Flight Path Map
This map shows the direct air route between Cosmopolis and Spokane Valley. Straight-line distance: 309.99 mi (498.88 km).
#1 Cosmopolis
City in Grays Harbor County, Washington, United States
| Population | 1,680 |
| Coordinates | 46.9553700, -123.7737800 |
| Altitude | 8 |
| Country | United States |
#2 Spokane Valley
The most populous city in Spokane County, Washington.
| Population | 102,893 |
| Coordinates | 47.6732300, -117.2393700 |
| Altitude | 615 |
| Country | United States |
End: North Pines Road (-117.239528, 47.673234)
Estimated Travel Time
Distance: 605 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 12h 32m |
| 40 mph (64.37 km/h) | 09h 24m |
| 50 mph (80.47 km/h) | 07h 31m |
| 60 mph (96.56 km/h) | 06h 16m |
| 70 mph (112.65 km/h) | 05h 22m |
| 80 mph (129 km/h) | 04h 41m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.23 | $69.44 | $138.88 |
| Mid-grade | $5.57 | $73.87 | $147.75 |
| Premium | $5.77 | $76.58 | $153.16 |
| Diesel | $5.47 | $72.55 | $145.09 |
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 · May 13, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.