How far is Federal Way, WA from Prosser, WA?
The driving distance from Federal Way, WA to Prosser, WA is about 195.8 miles (315.1 km), with a travel time of about 03h 47m by car.
- The straight-line flight distance is about 142.9 miles (230 km).
- For a round trip, plan for roughly 07h 34m 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 47m.
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.
Town of the United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Clear
Driving Route Map
The map below follows the saved road route between Federal Way and Prosser.
Turn-by-Turn Driving Directions
Step-by-step road directions between Federal Way and Prosser.
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1
Start on the route
7 m · 7 sec
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2
Turn left onto South 312th Street
48 m · 6 sec · South 312th Street
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3
Turn left onto Pacific Highway South
2669 ft · 1 min · Pacific Highway South
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4
Turn left onto South 320th Street
1.4 mi · 3 min · South 320th Street
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5
Continue on South Peasley Canyon Road
1 mi · 2 min · South Peasley Canyon Road
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6
Enter the roundabout and take exit 2 toward South Peasley Canyon Road
29 m · 2 sec · South Peasley Canyon Road
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7
Exit the roundabout onto South Peasley Canyon Road
1.2 km · 1 min · South Peasley Canyon Road
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8
Turn left onto West Valley Highway North
102 m · 11 sec · West Valley Highway North
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9
Take the ramp right toward WA 18 East, WA 167 North: Renton, North Bend
1154 ft · 28 sec
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10
Keep slight left to continue on WA 18 East
1261 ft · 31 sec
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11
Merge slight left onto State Route 18
24.4 mi · 31 min · State Route 18
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12
Continue on Snoqualmie Parkway
656 ft · 8 sec · Snoqualmie Parkway
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13
Take the exit slight right toward I 90 East: Spokane
3019 ft · 1 min
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14
Merge slight left
84.5 mi · 1 hr 33 min
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15
Take the exit slight right toward I 82 East, US 97 South: Yakima
37.8 mi · 43 min
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16
Keep slight left
42 mi · 45 min
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17
Take the exit slight right toward Prosser
2128 ft · 53 sec
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18
Turn right onto Gap Road
591 ft · 16 sec · Gap Road
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19
Continue on Wine Country Road
1.2 mi · 3 min · Wine Country Road
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20
Turn right onto 7th Street
1127 ft · 38 sec · 7th Street
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21
Turn left onto Bennett Avenue
22 m · 3 sec · Bennett Avenue
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22
Arrive at your destination
0 m · 1 sec · Bennett Avenue
Car Route Details
A richer read on the saved driving route between Federal Way and Prosser.
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
84.5 mi · 01h 33m
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.
Clear leaving Federal Way and Mostly Clear near Prosser.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Federal Way to Prosser?
The road trip is about 195.8 miles (315.1 km) and usually takes 03h 47m 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?
South Cle Elum is a useful midpoint, sitting about 97.7 miles from Federal Way and 98.1 miles from Prosser.
How much longer is the road route than the straight-line distance?
The direct path is about 142.9 miles (230 km), while the road route adds roughly 52.9 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 9:26 AM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $36.16 one way or $72.32 round trip. Estimated CO2 is about 61.4 kg one way.
What should you check before leaving?
Before you leave, expect Clear around Federal Way and Mostly Clear near Prosser.
Stop Ideas Near South Cle Elum
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 South Cle Elum.
Leavenworth, Washington
Leavenworth
Columbia Station
Stevens Pass, Washington
Flight Path Map
This map shows the direct air route between Federal Way and Prosser. Straight-line distance: 142.94 mi (230.04 km).
#1 Federal Way
A city in King County, Washington.
| Population | 96,307 |
| Coordinates | 47.3223200, -122.3126200 |
| Altitude | 141 |
| Country | United States |
#2 Prosser
County seat of Benton County, Washington
| Population | 6,398 |
| Coordinates | 46.2068000, -119.7689200 |
| Altitude | 203 |
| Country | United States |
End: Prosser (-119.76892, 46.2068)
Estimated Travel Time
Distance: 315 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 06h 31m |
| 40 mph (64.37 km/h) | 04h 53m |
| 50 mph (80.47 km/h) | 03h 54m |
| 60 mph (96.56 km/h) | 03h 15m |
| 70 mph (112.65 km/h) | 02h 47m |
| 80 mph (129 km/h) | 02h 26m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.23 | $36.16 | $72.32 |
| Mid-grade | $5.57 | $38.47 | $76.94 |
| Premium | $5.77 | $39.88 | $79.76 |
| Diesel | $5.47 | $37.78 | $75.55 |
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 · May 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.