How far is West Lake Sammamish, WA from Pasco, WA?
The driving distance from West Lake Sammamish, WA to Pasco, WA is about 203.6 miles (327.6 km), with a travel time of about 03h 23m by car.
- The straight-line flight distance is about 169.1 miles (272.2 km).
- For a round trip, plan for roughly 06h 47m 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 03h 23m.
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.
Mostly Sunny
Driving Route Map
The map below follows the saved road route between West Lake Sammamish and Pasco.
Turn-by-Turn Driving Directions
Step-by-step road directions between West Lake Sammamish and Pasco.
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1
Start on Southeast 40th Place
85 m · 14 sec · Southeast 40th Place
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2
Turn right
138 m · 36 sec
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3
Turn left onto West Lake Sammamish Parkway Southeast
1394 ft · 43 sec · West Lake Sammamish Parkway Southeast
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4
Enter the roundabout and take exit 1 toward West Lake Sammamish Parkway Southeast
28 m · 3 sec · West Lake Sammamish Parkway Southeast
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5
Exit the roundabout onto West Lake Sammamish Parkway Southeast
73 m · 8 sec · West Lake Sammamish Parkway Southeast
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6
Continue on West Lake Sammamish Parkway Southeast
1477 ft · 47 sec · West Lake Sammamish Parkway Southeast
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7
Turn left onto Southeast Newport Way
121 m · 15 sec · Southeast Newport Way
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8
Take the ramp left toward I 90 East: Issaquah, Spokane
1815 ft · 44 sec
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9
Merge slight left
96.6 mi · 1 hr 47 min
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10
Take the exit slight right toward I 82 East, US 97 South: Yakima
37.8 mi · 43 min
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11
Keep slight left
64.1 mi · 1 hr 9 min
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12
Take the exit slight right toward I‑182 east, US 12 east: Richland, Pasco
14.5 mi · 16 min
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13
Take the exit slight right toward North 4th Avenue: Pasco City Center
1011 ft · 25 sec
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14
Turn straight onto North 4th Avenue
3107 ft · 1 min · North 4th Avenue
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15
Turn right onto Court Street
1439 ft · 43 sec · Court Street
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16
Turn left onto North 8th Avenue
640 ft · 28 sec · North 8th Avenue
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17
Arrive at your destination
0 m · 1 sec · North 8th Avenue
Car Route Details
A richer read on the saved driving route between West Lake Sammamish and Pasco.
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 East
Merge slight left
96.6 mi · 01h 47m
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 Sunny leaving West Lake Sammamish and Sunny near Pasco.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from West Lake Sammamish to Pasco?
The road trip is about 203.6 miles (327.6 km) and usually takes 03h 23m 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 107.5 miles from West Lake Sammamish and 96.1 miles from Pasco.
How much longer is the road route than the straight-line distance?
The direct path is about 169.1 miles (272.2 km), while the road route adds roughly 34.5 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 10:12 AM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $37.57 one way or $75.15 round trip. Estimated CO2 is about 63.8 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around West Lake Sammamish and Sunny near Pasco.
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 West Lake Sammamish and Pasco. Straight-line distance: 169.12 mi (272.17 km).
#1 West Lake Sammamish
Census designated place
| Population | 33,929 |
| Coordinates | 47.5776000, -122.1012300 |
| Altitude | 9 |
| Country | United States |
#2 Pasco
The third most populous city in Franklin County, Washington.
| Population | 77,095 |
| Coordinates | 46.2395800, -119.1005700 |
| Altitude | 118 |
| Country | United States |
End: North 8th Avenue (-119.100625, 46.239581)
Estimated Travel Time
Distance: 328 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 06h 46m |
| 40 mph (64.37 km/h) | 05h 05m |
| 50 mph (80.47 km/h) | 04h 04m |
| 60 mph (96.56 km/h) | 03h 23m |
| 70 mph (112.65 km/h) | 02h 54m |
| 80 mph (129 km/h) | 02h 32m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.23 | $37.57 | $75.15 |
| Mid-grade | $5.57 | $39.97 | $79.94 |
| Premium | $5.77 | $41.44 | $82.87 |
| Diesel | $5.47 | $39.25 | $78.51 |
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 01, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.