Federal Way, WA to Kennewick, WA is 230.6 miles and takes about 4h 25m via I 90 and I 82, with a fuel budget near $48 and enough daylight to finish in a day. This drive will take you from the Pacific Coast region of Washington to another part of the same region, primarily sticking to major interstates. It's a straightforward, mostly highway trip that's ideal for a single-day excursion, allowing you to cover ground efficiently. Consider this route if you need to get from the Seattle metro area to the Tri-Cities region without much fuss.
Trip Pace
Same-day drive is realistic
A same-day return is possible, but it will make for a full day on the road.
Break Rhythm
1 planned break
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
115.3 miles from Federal Way, WA
A natural place for your longest stop of the day
, about 2h 16m into the drive
.
Main Roads
Road
Distance
Duration
I 90
84.5 mi
1h 33m
I 82
64.1 mi
1h 8m
US 97
37.8 mi
42m
State Route 18
24.4 mi
31m
WA 240
7.3 mi
9m
US 12
5.5 mi
5m
South Peasley Canyon Road
1.8 mi
3m
South 320th Street
1.4 mi
3m
Longest stretch:
I 90
— 84.5 mi, about 1h 33m
Traffic on I-90
Hour-of-day weekday pattern from 27 FHWA count stations on your route.
Peak
1 PM
~1,339 veh/hr typical
· worst 2,355
Quietest
2 AM
~108 veh/hr
Peak-to-quiet ratio
12.4×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 52 weeks of 2023 FHWA Travel Monitoring Analysis System data. Weekday hours only (Mon–Fri).
Turn-by-Turn Driving Directions
Step-by-step road directions between Federal Way, WA and Kennewick, WA.
1
Start on this road
24 ft·7 sec·this road
2
Turn left onto South 312th Street
158 ft·5 sec·South 312th Street
3
Turn left onto WA 99
0.5 mi·1 min·Pacific Highway South
4
Turn left onto South 320th Street
1.4 mi·3 min·South 320th Street
Use the straight lane.
5
Continue on South Peasley Canyon Road
1.0 mi·1 min·South Peasley Canyon Road
6
Enter roundabout onto South Peasley Canyon Road
95 ft·1 sec·South Peasley Canyon Road
7
Continue on South Peasley Canyon Road
0.7 mi·1 min·South Peasley Canyon Road
8
Turn left onto West Valley Highway North
334 ft·10 sec·West Valley Highway North
Use the left lane.
9
Take the ramp
0.2 mi·28 sec
Toward WA 18 East, WA 167 North: Renton, North BendUse the right lane.
10
Keep slight left at fork
0.2 mi·30 sec
Toward WA 18 East
11
Merge onto WA 18
24 mi·31 min·State Route 18
Use the straight / slight right lanes.
12
Continue on WA 18
0.1 mi·8 sec·Snoqualmie Parkway
13
Take the exit
0.6 mi·1 min
Toward I 90 East: Spokane
14
Merge onto I 90
85 mi·1 hr 33 min·I 90
Use the straight / slight right lanes.
15
Take the exit onto US 97
38 mi·42 min·US 97
Toward I 82 East, US 97 South: YakimaUse the straight / slight right lanes.
16
Keep slight left at fork onto I 82; US 12
64 mi·1 hr 8 min·I 82; US 12
17
Take the exit onto US 12
5.5 mi·5 min·US 12
Exit 102Toward I‑182 east, US 12 east: Richland, Pasco
18
Take the exit onto WA 240
7.3 mi·9 min·WA 240
Toward SR 240 east: KennewickUse the straight / slight right lanes.
19
Enter roundabout onto West Columbia Drive
0.1 mi·9 sec·West Columbia Drive
20
Continue on West Columbia Drive
0.5 mi·1 min·West Columbia Drive
21
Turn right onto North Fruitland Street
0.6 mi·1 min·North Fruitland Street
22
Turn right onto West Kennewick Avenue
0.5 mi·1 min·West Kennewick Avenue
23
Turn right onto North Newport Street
0.1 mi·31 sec·North Newport Street
24
Arrive at destination
North Newport Street
Trip Plan
For this 4h 25m drive, leaving in the morning is recommended to maximize daylight and avoid potential afternoon traffic. With only one recommended stop and a total distance of 230.6 miles, you have flexibility in pacing. The estimated fuel cost is $48, so ensure your tank is full before you depart Federal Way. Keep an eye on your fuel gauge, especially during the 84.5-mile stretch on I 90, as services might be less frequent in certain sections.
Morning Departure
An early start around 7-8 AM gets you there with plenty of daylight left.
Evening Departure
A late afternoon start means arriving after dark. Morning is better.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 115.3 miles from Federal Way, WA, or about 2h 16m into the drive.
The longest continuous stretch on this route runs about 84.5 miles.
This is a comfortable same-day trip.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 51 miles or 1h 5m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 115.3 miles or 2h 16m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 3h 37m
Traffic, exits, and arrival timing usually matter more near Kennewick, WA than in the middle of the route.
Before You Leave
+
Open the route before leaving Federal Way, WA so your first major turns are already loaded.
+
Leave with enough water and a charging cable within reach, not packed away.
+
Check your fuel range against the first long segment, especially if you are starting outside city service areas.
Day 1
Settle into the route from Federal Way, WA
This is one driving day of about 230.6 miles and 4h 25m.
Your first comfortable stop window is around 51 miles from Federal Way, WA.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 1 real break rather than only quick fuel stops.
The longest stretch is on I 90 for about 84.5 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Place data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 17
5 decision points cluster between mile 3.8 and 221.5 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
8
3.8 mi into trip|~8m in
Take the ramp toward WA 18 East, WA 167 North: Renton, North Bend
Lane positioning matters here. Multiple destination signs - pick the right one
Use the right lane.
Toward WA 18 East, WA 167 North: Renton, North...
6
4 mi into trip|~8m in
Keep slight left at fork toward WA 18 East
Highway fork - watch signs carefully
Toward WA 18 East
7
113.9 mi into trip|~2h 14m in|US 97
Take the exit onto US 97 toward I 82 East, US 97 South: Yakima
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Toward I 82 East, US 97 South: Yakima
6
215.9 mi into trip|~4h 6m in|US 12
Take the exit onto US 12 toward I‑182 east, US 12 east: Richland, Pasco
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Exit 102
Toward I‑182 east, US 12 east: Richland, Pasco
6
221.5 mi into trip|~4h 12m in|WA 240
Take the exit onto WA 240 toward SR 240 east: Kennewick
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the straight / slight right lanes.
Toward SR 240 east: Kennewick
Fuel & Cost
Regular Gas
$44.92 one way
$89.84 round trip
$4.95/gal25.4 MPG avg81 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$5.18
$47.06
$94.13
premium
$5.39
$48.94
$97.89
diesel
$4.80
$43.54
$87.08
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$45
Meals
$25–$50
Total
$70–$95
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 80.7 kg one way.
Prices: EIA weekly data, 2026-07-13.
Driving Electric?
About $24 in charging
· 0 stops
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
69.2
0
$24.21
$11.07
Efficient EV
57.7
0
$20.18
$9.22
EV Truck/SUV
92.2
1
$32.28
$14.76
Gas CO2
81 kg
EV CO2
27 kg (67% less)
Plan for 0 charging stops, roughly every 270 miles. Allow 25-40 minutes per stop at a DC fast charger.
DC fast charging avg $0.35/kWh. Home charging avg $0.16/kWh. US grid CO2: 0.39 kg/kWh.
Travel Intel
Current conditions at both ends of the drive.
Forecast as of Jul 18, 2026
Origin
Federal Way, WA
Morning
in Federal Way on Sunday
Local time
11:53 AM
PDT
Current temp
78°F
Mostly Sunny
W 5 mph1% chanceLive forecast
Red Flag Warning
Red Flag Warning issued July 17 at 9:08PM PDT until July 18 at 9:00PM PDT by NWS Spokane WA
Red Flag Warning
Red Flag Warning issued July 17 at 9:08PM PDT until July 18 at 9:00PM PDT by NWS Spokane WA
Destination
Kennewick, WA
Morning
in Kennewick on Sunday
Local time
11:53 AM
PDT
Current temp
95°F
Sunny
SW 8 mph0% chanceLive forecast
Red Flag Warning
Red Flag Warning issued July 17 at 9:08PM PDT until July 18 at 9:00PM PDT by NWS Spokane WA
Red Flag Warning
Red Flag Warning issued July 17 at 9:08PM PDT until July 18 at 9:00PM PDT by NWS Spokane WA
Seasonal Notes
Summer travel usually means heavier construction, hotter rest stops, and busier weekend traffic around major cities.
Winter travel shortens daylight, so a route that looks manageable on paper can feel much longer after dark.
Holiday weekends tend to make both departure and arrival windows slower than the raw route time suggests.
Time zone
Same local time
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
Temperature spread
17 degrees warmer at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
4h 25m on the road
An early start around 7-8 AM gets you there with plenty of daylight left.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
National Parks Near This Route
Worth a detour if your schedule allows.
Klondike Gold Rush - Seattle Unit National Historical Park
National Historical Park
Seattle flourished during and after the Klondike Gold Rush. Merchants supplied people from around the world passing through this port city on their way to a remarkable adventure in the Yukon Territory...
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
You'll spend 97% of this 230.6-mile route on highways, with the longest continuous stretch covering 84.5 miles on I 90. The transition to surface roads will be minimal as you approach your destination. Expect mostly cruising on well-maintained interstates for the bulk of the drive, with the potential for urban merging as you depart the Seattle area.
97% highway — fuel and pacing are the main things to plan.
24 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 84.5 mi on I 90.
How Hard Is This Drive?
8/10
This is a straightforward highway drive that stays mostly on I 90 and I 82. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 3.8 miles in.
Driving Effort8/10
Demanding - plan breaks and stay ahead of the key maneuvers
Balances navigation complexity with total wheel time.
This is a demanding drive. With 17 significant decision points across 230.6 miles, you will need to stay alert - especially through interchange areas and urban stretches. Consider splitting it into segments if you are not comfortable with fast highway navigation.
Where does it get tricky?
The main spots that need attention: at 3.8 miles: Lane positioning matters here. Multiple destination signs - pick the right one; at 4 miles: Highway fork - watch signs carefully; at 113.9 miles (US 97): Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
Elevation Profile
Hilly terrain with moderate elevation changes
2,418 ft407 ft
Total Climb
3,016 ft
Total Descent
3,074 ft
Highest Point
2,418 ft
~65.9 mi in
Elevation Range
2,011 ft
Notable High Points
2,295 ft at ~131.8 miles+823 ft prominence
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Federal Way, WA and Kennewick, WA, road signs point toward I‑182 East and Pasco.
Federal Way is a city in King County on the Puget Sound of Washington State. It is the home of the Pacific Bonsai Museum and Rhododendron Species Botanical Gardens. With a population of 96,000 (2016), Federal Way is one of Seattle's largest suburbs.
Top landmarks
•Wild Waves Theme Park — amusement park and water park in Federal Way, Washington, United States
Kennewick is a city in Benton County along the Columbia River of Washington State, roughly between the Yakima and Snake Rivers on the south bank of the Columbia.
Kennewick is the largest of the Tri-Cities of Washington, which also includes Pasco and Richland. The Tri-Cities are the third most populous metropolitan area in the state, after Seattle-Tacoma and Spokane.
Doable as a same-day drive at 4h 25m. Total distance: 230.6 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
4h 25m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (97%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 84.5 miles on I 90. The full list of main roads is in the Roads section above.
We did not find dedicated rest areas on this route. For a drive this long, plan bathroom and stretch breaks around gas stations, fast-food stops, or small-town downtowns — check the Nearby Places section for options.
It helps. This route has a higher-than-average number of complex decision points, which get harder in the dark. If the last hour of the trip is on surface roads or mountain grades, aim to arrive at Kennewick, WA before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.
Only with planning. This is a long drive for kids — consider splitting it into two days rather than pushing through. Plan at least 1 meaningful breaks. Dedicated rest areas are limited, so plan gas or food stops as your bathroom breaks.
The main spots that need attention: at 3.8 miles: Lane positioning matters here. Multiple destination signs - pick the right one; at 4 miles: Highway fork - watch signs carefully; at 113.9 miles (US 97): Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
Yes — Klondike Gold Rush - Seattle Unit National Historical Park. See the National Parks section for detour distances and tips on detours.
Possible but tiring. At 4.4 hours each way, an in-and-out day trip would put you behind the wheel for 8.9 hours — manageable with a long break at Kennewick, WA, but most travelers stay overnight.
