How far is Hermiston, OR from Portland, OR?
The driving distance from Hermiston, OR to Portland, OR is about 184.9 miles (297.6 km), with a travel time of about 03h 03m by car.
- The straight-line flight distance is about 164.9 miles (265.4 km).
- For a round trip, plan for roughly 06h 07m 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 03m.
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 and county seat of Wasco County, Oregon, Unite States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Rain Likely
Light Rain Likely
Driving Route Map
The map below follows the saved road route between Hermiston and Portland.
Turn-by-Turn Driving Directions
Step-by-step road directions between Hermiston and Portland.
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1
Start on East Main Street
158 m · 16 sec · East Main Street
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2
Turn right onto North 1st Place
122 m · 19 sec · North 1st Place
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3
Turn left onto West Hermiston Avenue
1.5 km · 2 min · West Hermiston Avenue
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4
At the end of the road, turn left onto Southwest 11th Street
1.3 mi · 2 min · Southwest 11th Street
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5
Continue on Butter Creek Highway
2.8 mi · 4 min · Butter Creek Highway
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6
Take the ramp right
1606 ft · 39 sec
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7
Merge slight left onto Old Oregon Trail Highway
14.9 mi · 16 min · Old Oregon Trail Highway
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8
Continue on Columbia River Highway
158.3 mi · 2 hr 56 min · Columbia River Highway
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9
Continue on Banfield Freeway
6.8 mi · 9 min · Banfield Freeway
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10
Keep slight left to continue on I 5 South: Salem, OMSI, City Center
1906 ft · 32 sec
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11
Keep slight right to continue on City Center, OMSI
1031 ft · 20 sec
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12
Keep slight right to continue on Morrison Street, City Center
1041 ft · 25 sec
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13
Turn straight onto Morrison Bridge
1433 ft · 39 sec · Morrison Bridge
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14
Turn slight right onto Naito Parkway Northbound
60 m · 8 sec
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15
Turn slight right onto Southwest 2nd Avenue
952 ft · 52 sec · Southwest 2nd Avenue
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16
Turn left onto Southwest Ash Street
552 ft · 25 sec · Southwest Ash Street
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17
Turn right onto Southwest 4th Avenue
58 m · 10 sec · Southwest 4th Avenue
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18
Continue on Northwest 4th Avenue
85 m · 17 sec · Northwest 4th Avenue
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19
Turn left onto Northwest Couch Street
130 m · 25 sec · Northwest Couch Street
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20
Turn left
34 m · 8 sec
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21
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Hermiston and Portland.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Columbia River Highway
Continue on Columbia River Highway
158 mi · 02h 56m
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.
Rain Likely leaving Hermiston and Light Rain Likely near Portland.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Hermiston to Portland?
The road trip is about 184.9 miles (297.6 km) and usually takes 03h 03m 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?
The Dalles is a useful midpoint, sitting about 93.3 miles from Hermiston and 91.6 miles from Portland.
How much longer is the road route than the straight-line distance?
The direct path is about 164.9 miles (265.4 km), while the road route adds roughly 20 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 10:52 AM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $32.33 one way or $64.66 round trip. Estimated CO2 is about 58 kg one way.
What should you check before leaving?
Before you leave, expect Rain Likely around Hermiston and Light Rain Likely near Portland.
Stop Ideas Near The Dalles
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 The Dalles.
The Dalles, Oregon
Wishram
Bingen – White Salmon
Hood River, Oregon
Flight Path Map
This map shows the direct air route between Hermiston and Portland. Straight-line distance: 164.93 mi (265.43 km).
#1 Hermiston
City in Oregon, USA
| Population | 17,791 |
| Coordinates | 45.8404100, -119.2894600 |
| Altitude | 140 |
| 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: 298 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 06h 09m |
| 40 mph (64.37 km/h) | 04h 37m |
| 50 mph (80.47 km/h) | 03h 41m |
| 60 mph (96.56 km/h) | 03h 04m |
| 70 mph (112.65 km/h) | 02h 38m |
| 80 mph (129 km/h) | 02h 18m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.95 | $32.33 | $64.66 |
| Mid-grade | $5.34 | $34.86 | $69.71 |
| Premium | $5.57 | $36.35 | $72.69 |
| Diesel | $6.37 | $41.57 | $83.14 |
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 · Apr 23, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.