How far is Federal Way, WA from Ahtanum, WA?
The driving distance from Federal Way, WA to Ahtanum, WA is about 155.3 miles (249.9 km), with a travel time of about 03h 09m by car.
- The straight-line flight distance is about 95.6 miles (153.8 km).
- For a round trip, plan for roughly 06h 18m 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 09m.
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, USA
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 Federal Way and Ahtanum.
Turn-by-Turn Driving Directions
Step-by-step road directions between Federal Way and Ahtanum.
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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
31.3 mi · 34 min
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16
Take the exit slight right toward US 12 west, North 1st Street
96 m · 5 sec
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17
Keep slight right to continue on US 12 west, North 1st Street
1748 ft · 25 sec
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18
Merge slight left
1.8 mi · 2 min
-
19
Take the exit slight right toward North 40th Avenue, Fruitvale BOulevard
3102 ft · 1 min
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20
Continue on North 40th Avenue
3 mi · 7 min · North 40th Avenue
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21
Turn right onto Loren Place
112 m · 13 sec · Loren Place
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22
Continue on South 42th Avenue
741 ft · 27 sec · South 42th Avenue
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23
At the end of the road, turn right onto West Washington Avenue
1.7 mi · 3 min · West Washington Avenue
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24
Turn left onto South 64th Avenue
1.4 km · 2 min · South 64th Avenue
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25
At the end of the road, turn right onto Ahtanum Road
1.3 mi · 2 min · Ahtanum Road
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26
Turn right onto South 84th Avenue
108 m · 18 sec · South 84th Avenue
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27
Turn left onto Aspen Road
110 m · 14 sec · Aspen Road
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28
Turn right onto South 85th Avenue
33 m · 4 sec · South 85th Avenue
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29
Arrive at your destination
0 m · 1 sec · South 85th Avenue
Car Route Details
A richer read on the saved driving route between Federal Way and Ahtanum.
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.
Mostly Sunny leaving Federal Way and Sunny near Ahtanum.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Federal Way to Ahtanum?
The road trip is about 155.3 miles (249.9 km) and usually takes 03h 09m 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?
Roslyn is a useful midpoint, sitting about 77.5 miles from Federal Way and 77.7 miles from Ahtanum.
How much longer is the road route than the straight-line distance?
The direct path is about 95.6 miles (153.8 km), while the road route adds roughly 59.7 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 10:42 AM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $28.68 one way or $57.35 round trip. Estimated CO2 is about 48.7 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Federal Way and Sunny near Ahtanum.
Stop Ideas Near Roslyn
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 Roslyn.
Leavenworth, Washington
Leavenworth
Columbia Station
Stevens Pass, Washington
Flight Path Map
This map shows the direct air route between Federal Way and Ahtanum. Straight-line distance: 95.59 mi (153.83 km).
#1 Federal Way
A city in King County, Washington.
| Population | 96,307 |
| Coordinates | 47.3223200, -122.3126200 |
| Altitude | 141 |
| Country | United States |
#2 Ahtanum
Census designated place
| Population | 3,601 |
| Coordinates | 46.5595700, -120.6220100 |
| Altitude | 380 |
| Country | United States |
End: Ahtanum (-120.62201, 46.55957)
Estimated Travel Time
Distance: 250 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 05h 10m |
| 40 mph (64.37 km/h) | 03h 52m |
| 50 mph (80.47 km/h) | 03h 06m |
| 60 mph (96.56 km/h) | 02h 35m |
| 70 mph (112.65 km/h) | 02h 13m |
| 80 mph (129 km/h) | 01h 56m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.23 | $28.68 | $57.35 |
| Mid-grade | $5.57 | $30.51 | $61.01 |
| Premium | $5.77 | $31.63 | $63.25 |
| Diesel | $5.47 | $29.96 | $59.92 |
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 18, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.