How far is Mercer Island, WA from Spokane Valley, WA?
The driving distance from Mercer Island, WA to Spokane Valley, WA is about 282.2 miles (454.1 km), with a travel time of about 04h 25m by car.
- The straight-line flight distance is about 232.1 miles (373.6 km).
- For a round trip, plan for roughly 08h 51m 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 25m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
This departure sits inside the recommended comfort window for the route.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
City in Washington, USA
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Cloudy
Mostly Sunny then Chance Rain Showers
Driving Route Map
The map below follows the saved road route between Mercer Island and Spokane Valley.
Turn-by-Turn Driving Directions
Step-by-step road directions between Mercer Island and Spokane Valley.
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1
Start on Southeast 42nd Street
539 ft · 28 sec · Southeast 42nd Street
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2
At the end of the road, turn right onto 86th Avenue Southeast
1325 ft · 49 sec · 86th Avenue Southeast
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3
Turn right onto Southeast 40th Street
1344 ft · 44 sec · Southeast 40th Street
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4
Turn left onto Gallagher Hill Road
1478 ft · 41 sec · Gallagher Hill Road
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5
Continue on Southeast 36th Street
2209 ft · 1 min · Southeast 36th Street
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6
Take the ramp straight toward I 90 East
1819 ft · 46 sec
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7
Merge slight left onto East Channel Bridge
269.2 mi · 4 hr 53 min · East Channel Bridge
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8
Merge slight right
11.3 mi · 14 min
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9
Take the exit slight right toward WA 27
2039 ft · 52 sec
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10
Turn left onto North Pines Road
45 m · 11 sec · North Pines Road
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11
Arrive at your destination
0 m · 1 sec · North Pines Road
Car Route Details
A richer read on the saved driving route between Mercer Island and Spokane Valley.
Straightforward drive
The saved road route has a manageable number of maneuvers and should be easy to follow with normal attention to signs.
East Channel Bridge
Merge slight left onto East Channel Bridge
269 mi · 04h 53m
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.
Mostly Cloudy leaving Mercer Island and Mostly Sunny then Chance Rain Showers near Spokane Valley.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Mercer Island to Spokane Valley?
The road trip is about 282.2 miles (454.1 km) and usually takes 04h 25m 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?
George is a useful midpoint, sitting about 141 miles from Mercer Island and 141.2 miles from Spokane Valley.
How much longer is the road route than the straight-line distance?
The direct path is about 232.1 miles (373.6 km), while the road route adds roughly 50.1 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 6:00 AM to 8:00 AM PDT. If you want a more comfortable same-day return, try to leave by 8:08 AM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $52.12 one way or $104.24 round trip. Estimated CO2 is about 88.5 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Cloudy around Mercer Island and Mostly Sunny then Chance Rain Showers near Spokane Valley.
Stop Ideas Near George
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 George.
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Flight Path Map
This map shows the direct air route between Mercer Island and Spokane Valley. Straight-line distance: 232.11 mi (373.55 km).
#1 Mercer Island
Island in the United States of America
| Population | 25,912 |
| Coordinates | 47.5706500, -122.2220700 |
| Altitude | 102 |
| 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: 454 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 09h 24m |
| 40 mph (64.37 km/h) | 07h 03m |
| 50 mph (80.47 km/h) | 05h 38m |
| 60 mph (96.56 km/h) | 04h 42m |
| 70 mph (112.65 km/h) | 04h 01m |
| 80 mph (129 km/h) | 03h 31m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.23 | $52.12 | $104.24 |
| Mid-grade | $5.57 | $55.45 | $110.89 |
| Premium | $5.77 | $57.48 | $114.96 |
| Diesel | $5.47 | $54.45 | $108.90 |
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 · Jun 03, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.