How far is Ontario, OR from Portland, OR?
The driving distance from Ontario, OR to Portland, OR is about 375.9 miles (604.9 km), with a travel time of about 05h 56m by car.
- The straight-line flight distance is about 298.6 miles (480.6 km).
- For a round trip, plan for roughly 11h 52m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM MDT.
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 05h 56m.
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 Oregon, USA
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Sunny then Slight Chance Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between Ontario and Portland.
Turn-by-Turn Driving Directions
Step-by-step road directions between Ontario and Portland.
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1
Start on South Oregon Street
8 m · 3 sec · South Oregon Street
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2
Turn right onto East Idaho Avenue
1.3 km · 1 min · East Idaho Avenue
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3
Turn left
2067 ft · 50 sec
-
4
Merge slight left onto Old Oregon Trail Highway
208.1 mi · 3 hr 45 min · Old Oregon Trail Highway
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5
Continue on Columbia River Highway
158.3 mi · 2 hr 56 min · Columbia River Highway
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6
Continue on Banfield Freeway
6.8 mi · 9 min · Banfield Freeway
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7
Keep slight left to continue on I 5 South: Salem, OMSI, City Center
1906 ft · 32 sec
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8
Keep slight right to continue on City Center, OMSI
1031 ft · 20 sec
-
9
Keep slight right to continue on Morrison Street, City Center
1041 ft · 25 sec
-
10
Turn straight onto Morrison Bridge
1581 ft · 43 sec · Morrison Bridge
-
11
Continue on Southwest Washington Street
551 ft · 29 sec · Southwest Washington Street
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12
Turn right onto Southwest 4th Avenue
1230 ft · 1 min · Southwest 4th Avenue
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13
Continue on Northwest 4th Avenue
85 m · 17 sec · Northwest 4th Avenue
-
14
Turn left onto Northwest Couch Street
130 m · 25 sec · Northwest Couch Street
-
15
Turn left
34 m · 8 sec
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16
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Ontario and Portland.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
Old Oregon Trail Highway
Merge slight left onto Old Oregon Trail Highway
208 mi · 03h 45m
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 Ontario and Sunny then Slight Chance Showers And Thunderstorms near Portland.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Ontario to Portland?
The road trip is about 375.9 miles (604.9 km) and usually takes 05h 56m 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?
Echo is a useful midpoint, sitting about 187.7 miles from Ontario and 188.2 miles from Portland.
How much longer is the road route than the straight-line distance?
The direct path is about 298.6 miles (480.6 km), while the road route adds roughly 77.3 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 MDT. If you want a more comfortable same-day return, try to leave by 5:08 AM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $65.65 one way or $131.30 round trip. Estimated CO2 is about 117.8 kg one way.
Do you cross a time zone on this route?
Yes. There is about a 1 hour time difference between Ontario and Portland, so arrival and return times should be read in local time.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Ontario and Sunny then Slight Chance Showers And Thunderstorms near Portland.
Stop Ideas Near Echo
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 Echo.
Pendleton, Oregon
Pasco Intermodal Train Station
Walla Walla, WA
La Grande, Oregon
Flight Path Map
This map shows the direct air route between Ontario and Portland. Straight-line distance: 298.62 mi (480.58 km).
#1 Ontario
City in Oregon, USA
| Population | 11,140 |
| Coordinates | 44.0265500, -116.9629400 |
| Altitude | 656 |
| Country | United States |
#2 Portland
The twenty-sixth most populous city in the United States and the center of the Portland metropolitan area.
| Population | 656,751 |
| Coordinates | 45.5234500, -122.6762100 |
| Altitude | 12 |
| Country | United States |
End: (-122.676082, 45.523482)
Estimated Travel Time
Distance: 605 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 12h 31m |
| 40 mph (64.37 km/h) | 09h 23m |
| 50 mph (80.47 km/h) | 07h 30m |
| 60 mph (96.56 km/h) | 06h 15m |
| 70 mph (112.65 km/h) | 05h 22m |
| 80 mph (129 km/h) | 04h 41m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.95 | $65.65 | $131.30 |
| Mid-grade | $5.34 | $70.78 | $141.56 |
| Premium | $5.57 | $73.81 | $147.61 |
| Diesel | $6.37 | $84.41 | $168.83 |
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 28, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.