How far is Cosmopolis, WA from Seattle, WA?
The driving distance from Cosmopolis, WA to Seattle, WA is about 108.7 miles (175 km), with a travel time of about 01h 57m by car.
- The straight-line flight distance is about 81.2 miles (130.6 km).
- For a round trip, plan for roughly 03h 54m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM PDT.
Reverse, save, or send this route
This route works well as a day trip with time at the destination. Copy the route link, send it to another device, or print a clean version before you head out.
This route works well as a day trip with time at the destination.
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 01h 57m.
A morning start gives you useful time at the destination and keeps the return out of the late evening.
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.
The most populous city in Thurston County, Washington.
Route Weather Snapshot
Check the forecast at both ends before you head out.
Light Rain Likely
Light Rain Likely
Driving Route Map
The map below follows the saved road route between Cosmopolis and Seattle.
Turn-by-Turn Driving Directions
Step-by-step road directions between Cosmopolis and Seattle.
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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
31.9 mi · 40 min
-
13
Take the exit slight left toward Seneca Street
1359 ft · 36 sec
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14
Turn left onto Seneca Street
98 m · 18 sec · Seneca Street
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15
Turn left onto 5th Avenue
615 ft · 27 sec · 5th Avenue
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16
Turn right onto Madison Street
34 m · 9 sec · Madison Street
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17
Turn left
9 m · 2 sec
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18
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Cosmopolis and Seattle.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Olympic Highway
Keep slight right
31.9 mi · 00h 40m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A comfortable day-trip route
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
Light Rain Likely leaving Cosmopolis and Light Rain Likely near Seattle.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Cosmopolis to Seattle?
The road trip is about 108.7 miles (175 km) and usually takes 01h 57m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
What is the halfway point on this route?
Lacey is a useful midpoint, sitting about 55.3 miles from Cosmopolis and 53.4 miles from Seattle.
How much longer is the road route than the straight-line distance?
The direct path is about 81.2 miles (130.6 km), while the road route adds roughly 27.5 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 8:00 AM to 10:00 AM PDT. If you want a more comfortable same-day return, try to leave by 2:36 PM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $20.09 one way or $40.19 round trip. Estimated CO2 is about 34.1 kg one way.
What should you check before leaving?
Before you leave, expect Light Rain Likely around Cosmopolis and Light Rain Likely near Seattle.
Stop Ideas Near Lacey
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
City of Lacey - City Hall Parking
Olympia City Hall
Lacey Community Center
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Lacey.
Centennial Station
Centralia station
Tacoma Dome Station
Tukwila station
Flight Path Map
This map shows the direct air route between Cosmopolis and Seattle. Straight-line distance: 81.17 mi (130.63 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 Seattle
The eighteenth most populous city in the United States and the center of the Seattle metropolitan area.
| Population | 769,714 |
| Coordinates | 47.6062100, -122.3320700 |
| Altitude | 56 |
| Country | United States |
End: (-122.332143, 47.606309)
Estimated Travel Time
Distance: 175 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 03h 37m |
| 40 mph (64.37 km/h) | 02h 43m |
| 50 mph (80.47 km/h) | 02h 10m |
| 60 mph (96.56 km/h) | 01h 48m |
| 70 mph (112.65 km/h) | 01h 33m |
| 80 mph (129 km/h) | 01h 21m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.23 | $20.09 | $40.19 |
| Mid-grade | $5.57 | $21.38 | $42.75 |
| Premium | $5.77 | $22.16 | $44.32 |
| Diesel | $5.47 | $20.99 | $41.99 |
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 23, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.