How far is Seaside, OR from Lake Oswego, OR?
The driving distance from Seaside, OR to Lake Oswego, OR is about 84.4 miles (135.8 km), with a travel time of about 01h 39m by car.
- The straight-line flight distance is about 72.2 miles (116.2 km).
- For a round trip, plan for roughly 03h 19m 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 39m.
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.
City in Oregon, USA
Route Weather Snapshot
Check the forecast at both ends before you head out.
Partly Sunny
Mostly Cloudy
Driving Route Map
The map below follows the saved road route between Seaside and Lake Oswego.
Turn-by-Turn Driving Directions
Step-by-step road directions between Seaside and Lake Oswego.
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1
Start on Broadway Street
157 m · 17 sec · Broadway Street
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2
Turn right onto South Roosevelt Drive
3.8 mi · 7 min · South Roosevelt Drive
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3
Take the exit slight right toward US 26 East: Portland
1067 ft · 16 sec
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4
Continue on Sunset Highway
35.1 mi · 44 min · Sunset Highway
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5
Continue on Northwest Sunset Highway
14 mi · 20 min · Northwest Sunset Highway
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6
Continue on Northwest Sunset Highway
19.8 mi · 27 min · Northwest Sunset Highway
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7
Take the exit slight right toward OR 217 South: Tigard, Salem
1574 ft · 45 sec
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8
Merge slight left onto Beaverton-Tigard Freeway
7 mi · 10 min · Beaverton-Tigard Freeway
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9
Continue on Kruse Way
1.5 mi · 3 min · Kruse Way
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10
At the end of the road, turn left onto Boones Ferry Road
1.1 km · 1 min · Boones Ferry Road
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11
Turn slight right
546 ft · 13 sec
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12
Turn straight onto Country Club Road
1.6 mi · 3 min · Country Club Road
-
13
Continue on A Avenue
1157 ft · 38 sec · A Avenue
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14
Turn left
65 m · 16 sec
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15
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Seaside and Lake Oswego.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Sunset Highway
Continue on Sunset Highway
35.1 mi · 00h 44m
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.
Partly Sunny leaving Seaside and Mostly Cloudy near Lake Oswego.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Seaside to Lake Oswego?
The road trip is about 84.4 miles (135.8 km) and usually takes 01h 39m 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?
Vernonia is a useful midpoint, sitting about 42.1 miles from Seaside and 42.3 miles from Lake Oswego.
How much longer is the road route than the straight-line distance?
The direct path is about 72.2 miles (116.2 km), while the road route adds roughly 12.2 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 8:00 AM to 10:00 AM PDT. If you want a more comfortable same-day return, try to leave by 3:10 PM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $14.75 one way or $29.51 round trip. Estimated CO2 is about 26.5 kg one way.
What should you check before leaving?
Before you leave, expect Partly Sunny around Seaside and Mostly Cloudy near Lake Oswego.
Stop Ideas Near Vernonia
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 Vernonia.
Manning, Oregon
Elsie, Oregon
Kelso Multimodal Transportation Center
Necanicum Junction, Oregon
Flight Path Map
This map shows the direct air route between Seaside and Lake Oswego. Straight-line distance: 72.2 mi (116.2 km).
#1 Seaside
City in Oregon, USA
| Population | 6,926 |
| Coordinates | 45.9931600, -123.9226400 |
| Altitude | 2 |
| Country | United States |
#2 Lake Oswego
A city in Clackamas County, Oregon.
| Population | 39,821 |
| Coordinates | 45.4206700, -122.6706500 |
| Altitude | 55 |
| Country | United States |
End: (-122.670933, 45.420701)
Estimated Travel Time
Distance: 136 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 02h 48m |
| 40 mph (64.37 km/h) | 02h 06m |
| 50 mph (80.47 km/h) | 01h 41m |
| 60 mph (96.56 km/h) | 01h 24m |
| 70 mph (112.65 km/h) | 01h 12m |
| 80 mph (129 km/h) | 01h 03m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.95 | $14.75 | $29.51 |
| Mid-grade | $5.34 | $15.91 | $31.81 |
| Premium | $5.57 | $16.59 | $33.17 |
| Diesel | $6.37 | $18.97 | $37.94 |
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 Oregon · May 06, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.