How far is Spokane, WA from Mercer Island, WA?
The driving distance from Spokane, WA to Mercer Island, WA is about 273.9 miles (440.8 km), with a travel time of about 05h 03m by car.
- The straight-line flight distance is about 223.3 miles (359.3 km).
- For a round trip, plan for roughly 10h 06m 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 05h 03m.
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 Washington, USA
Route Weather Snapshot
Check the forecast at both ends before you head out.
Chance Light Rain
Driving Route Map
The map below follows the saved road route between Spokane and Mercer Island.
Turn-by-Turn Driving Directions
Step-by-step road directions between Spokane and Mercer Island.
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1
Start on South Gorge Trail
48 m · 21 sec · South Gorge Trail
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2
Turn right
8 m · 9 sec
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3
Turn left onto West Main Avenue
141 m · 20 sec · West Main Avenue
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4
Turn right onto North Monroe Street
2139 ft · 1 min · North Monroe Street
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5
Turn slight right onto West Freeway Avenue
643 ft · 18 sec · West Freeway Avenue
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6
Keep slight left to continue on West Freeway Avenue
57 m · 5 sec · West Freeway Avenue
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7
Take the ramp straight toward I 90 West: Seattle
1245 ft · 30 sec
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8
Merge slight left
2 mi · 3 min
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9
Keep slight left
56.6 mi · 1 hr 1 min
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10
Keep slight left
212.7 mi · 3 hr 52 min
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11
Take the exit slight right toward East Mercer Way
1561 ft · 46 sec
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12
Turn left onto East Mercer Way
101 m · 11 sec · East Mercer Way
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13
Turn sharp right onto Southeast 36th Street
2214 ft · 1 min · Southeast 36th Street
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14
Continue on Gallagher Hill Road
1478 ft · 43 sec · Gallagher Hill Road
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15
Turn right onto Southeast 40th Street
1344 ft · 46 sec · Southeast 40th Street
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16
Turn left onto 86th Avenue Southeast
1325 ft · 53 sec · 86th Avenue Southeast
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17
Turn left onto Southeast 42nd Street
539 ft · 24 sec · Southeast 42nd Street
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18
Arrive at your destination
0 m · 1 sec · Southeast 42nd Street
Car Route Details
A richer read on the saved driving route between Spokane and Mercer Island.
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
Keep slight left
213 mi · 03h 52m
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.
Partly Sunny leaving Spokane and Chance Light Rain near Mercer Island.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Spokane to Mercer Island?
The road trip is about 273.9 miles (440.8 km) and usually takes 05h 03m 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 136.6 miles from Spokane and 137.3 miles from Mercer Island.
How much longer is the road route than the straight-line distance?
The direct path is about 223.3 miles (359.3 km), while the road route adds roughly 50.6 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 6:54 AM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $50.60 one way or $101.21 round trip. Estimated CO2 is about 85.9 kg one way.
What should you check before leaving?
Before you leave, expect Partly Sunny around Spokane and Chance Light Rain near Mercer Island.
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.
Quincy, Washington
Ephrata, WA
Ephrata
Moses Lake, Washington
Flight Path Map
This map shows the direct air route between Spokane and Mercer Island. Straight-line distance: 223.29 mi (359.35 km).
#1 Spokane
The second most populous city in Washington.
| Population | 222,050 |
| Coordinates | 47.6596600, -117.4290800 |
| Altitude | 571 |
| Country | United States |
#2 Mercer Island
Island in the United States of America
| Population | 25,912 |
| Coordinates | 47.5706500, -122.2220700 |
| Altitude | 102 |
| Country | United States |
End: Mercer Island (-122.22207, 47.57065)
Estimated Travel Time
Distance: 441 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 09h 07m |
| 40 mph (64.37 km/h) | 06h 50m |
| 50 mph (80.47 km/h) | 05h 28m |
| 60 mph (96.56 km/h) | 04h 33m |
| 70 mph (112.65 km/h) | 03h 54m |
| 80 mph (129 km/h) | 03h 25m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.23 | $50.60 | $101.21 |
| Mid-grade | $5.57 | $53.83 | $107.67 |
| Premium | $5.77 | $55.81 | $111.61 |
| Diesel | $5.47 | $52.87 | $105.73 |
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 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.