How far is Dayton, WA from Seattle, WA?
The driving distance from Dayton, WA to Seattle, WA is about 269 miles (432.9 km), with a travel time of about 04h 33m by car.
- The straight-line flight distance is about 223.8 miles (360.2 km).
- For a round trip, plan for roughly 09h 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 04h 33m.
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.
The second most populous city in Yakima County, Washington.
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 Dayton and Seattle.
Turn-by-Turn Driving Directions
Step-by-step road directions between Dayton and Seattle.
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1
Start on Patit Road
26 m · 8 sec · Patit Road
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2
Turn left onto East Main Street
10.1 mi · 16 min · East Main Street
-
3
At the end of the road, turn right onto Main Street
44 m · 8 sec · Main Street
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4
Turn left onto West 2nd Street
2304 ft · 39 sec · West 2nd Street
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5
Continue on State Highway 124
7.7 mi · 11 min · State Highway 124
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6
Continue on East Second Street
1.3 km · 1 min · East Second Street
-
7
Continue on State Route 124
35.5 mi · 53 min · State Route 124
-
8
Turn slight right
4 m · 1 sec
-
9
Take the ramp slight right
1036 ft · 28 sec
-
10
Merge slight left onto Lewis and Clark Trail
6.6 mi · 7 min · Lewis and Clark Trail
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11
Keep slight left to continue on I 182, US 12
11.8 mi · 13 min
-
12
Keep slight right to continue on I 82 West, US 12 West: Prosser, Yakima
70.9 mi · 1 hr 17 min
-
13
Continue straight
31 mi · 34 min
-
14
Keep slight left to continue on I 90 West
107.5 mi · 2 hr 2 min
-
15
Continue on Mount Baker Ridge Tunnel
1.3 mi · 2 min · Mount Baker Ridge Tunnel
-
16
Take the exit slight right toward I 5 North: Vancouver British Columbia, James Street, Madison Street
1.2 km · 1 min
-
17
Keep slight left to continue on I 5 North: Vancouver British Columbia, Madison Street, Convention Center
881 ft · 22 sec
-
18
Keep slight right to continue on Madison Street, Convention Place
1843 ft · 55 sec
-
19
Turn left onto Madison Street
760 ft · 35 sec · Madison Street
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20
Turn left
9 m · 2 sec
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21
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Dayton 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.
I 90 West
Keep slight left to continue on I 90 West
107 mi · 02h 02m
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.
Sunny leaving Dayton and Mostly Sunny near Seattle.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Dayton to Seattle?
The road trip is about 269 miles (432.9 km) and usually takes 04h 33m 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?
Yakima is a useful midpoint, sitting about 142.1 miles from Dayton and 126.8 miles from Seattle.
How much longer is the road route than the straight-line distance?
The direct path is about 223.8 miles (360.2 km), while the road route adds roughly 45.2 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 8:00 AM PDT. If you want a more comfortable same-day return, try to leave by 7:54 AM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $51.58 one way or $103.16 round trip. Estimated CO2 is about 84.3 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Dayton and Mostly Sunny near Seattle.
Stop Ideas Near Yakima
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 Yakima.
Quincy, Washington
Columbia Station
Ephrata, WA
Ephrata
Flight Path Map
This map shows the direct air route between Dayton and Seattle. Straight-line distance: 223.81 mi (360.19 km).
#1 Dayton
Situated in southeastern Washington at an elevation of 1660 feet, this Columbia County seat lies in the foothills of the Blue Mountains along the Touchet River.
| Population | 0 |
| Coordinates | 46.3237500, -117.9724400 |
| Altitude | 506 |
| 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: 433 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 08h 57m |
| 40 mph (64.37 km/h) | 06h 43m |
| 50 mph (80.47 km/h) | 05h 22m |
| 60 mph (96.56 km/h) | 04h 28m |
| 70 mph (112.65 km/h) | 03h 50m |
| 80 mph (129 km/h) | 03h 21m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.44 | $51.58 | $103.16 |
| Mid-grade | $5.72 | $54.27 | $108.55 |
| Premium | $5.98 | $56.72 | $113.44 |
| Diesel | $7.29 | $69.20 | $138.40 |
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 · Oct 15, 2026