How far is Portland, OR from Monmouth, OR?
The driving distance from Portland, OR to Monmouth, OR is about 61.7 miles (99.3 km), with a travel time of about 01h 26m by car.
- The straight-line flight distance is about 54 miles (86.9 km).
- For a round trip, plan for roughly 02h 53m 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 26m.
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
Driving Route Map
The map below follows the saved road route between Portland and Monmouth.
Turn-by-Turn Driving Directions
Step-by-step road directions between Portland and Monmouth.
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1
Start on the route
34 m · 13 sec
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2
Turn left onto Northwest Couch Street
2074 ft · 2 min · Northwest Couch Street
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3
Turn left onto Northwest 13th Avenue
1593 ft · 1 min · Northwest 13th Avenue
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4
Turn right onto Southwest Taylor Street
9 m · 1 sec · Southwest Taylor Street
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5
Take the ramp slight left toward I 405 South
2393 ft · 44 sec
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6
Merge slight left onto Stadium Freeway
1.5 mi · 2 min · Stadium Freeway
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7
Merge slight right
39.3 mi · 48 min
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8
Take the exit slight right toward OR 99E Business: Salem Parkway
2557 ft · 1 min
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9
Merge slight right onto Doctor Martin Luther King Junior Parkway
3 mi · 5 min · Doctor Martin Luther King Junior Parkway
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10
Continue on Commercial Street Northeast
1.1 mi · 3 min · Commercial Street Northeast
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11
Continue on D Street Northeast
136 m · 26 sec · D Street Northeast
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12
Turn left onto Front Street Northeast
976 ft · 44 sec · Front Street Northeast
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13
Continue on Front Street Northeast
87 m · 15 sec · Front Street Northeast
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14
Turn left onto Union Street Northeast
150 m · 23 sec · Union Street Northeast
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15
Turn right onto Commercial Street Northeast
135 m · 19 sec · Commercial Street Northeast
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16
Turn right onto Marion Street Bridge
2999 ft · 1 min · Marion Street Bridge
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17
Continue on Salem Dallas Highway Northwest
5 mi · 7 min · Salem Dallas Highway Northwest
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18
Turn left onto Independence Highway
5.5 mi · 8 min · Independence Highway
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19
Continue on North Main Street
1.4 km · 1 min · North Main Street
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20
Turn right onto Monmouth Street
1.5 mi · 2 min · Monmouth Street
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21
Continue on Monmouth Independence Highway
1874 ft · 32 sec · Monmouth Independence Highway
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22
Continue on Main Street East
1.1 km · 1 min · Main Street East
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23
Arrive at your destination
0 m · 1 sec · Main Street East
Car Route Details
A richer read on the saved driving route between Portland and Monmouth.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Stadium Freeway
Merge slight right
39.3 mi · 00h 48m
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.
Mostly Sunny leaving Portland and Partly Sunny near Monmouth.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Portland to Monmouth?
The road trip is about 61.7 miles (99.3 km) and usually takes 01h 26m 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?
Woodburn is a useful midpoint, sitting about 30.8 miles from Portland and 30.9 miles from Monmouth.
How much longer is the road route than the straight-line distance?
The direct path is about 54 miles (86.9 km), while the road route adds roughly 7.7 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 8:00 AM to 10:00 AM PDT. If you want a more comfortable same-day return, try to leave by 3:36 PM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $10.79 one way or $21.59 round trip. Estimated CO2 is about 19.4 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Portland and Partly Sunny near Monmouth.
Stop Ideas Near Woodburn
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Salem city park
Woodburn City Hall
Old City Hall
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Woodburn.
Woodburn, OR
Salem station
Oregon City station
Union Station
Flight Path Map
This map shows the direct air route between Portland and Monmouth. Straight-line distance: 53.97 mi (86.86 km).
#1 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 |
#2 Monmouth
City in Oregon, USA
| Population | 10,615 |
| Coordinates | 44.8484500, -123.2339900 |
| Altitude | 62 |
| Country | United States |
End: Monmouth (-123.23399, 44.84845)
Estimated Travel Time
Distance: 99 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 02h 03m |
| 40 mph (64.37 km/h) | 01h 32m |
| 50 mph (80.47 km/h) | 01h 14m |
| 60 mph (96.56 km/h) | 01h 01m |
| 70 mph (112.65 km/h) | 00h 52m |
| 80 mph (129 km/h) | 00h 46m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.95 | $10.79 | $21.59 |
| Mid-grade | $5.34 | $11.64 | $23.27 |
| Premium | $5.57 | $12.13 | $24.27 |
| Diesel | $6.37 | $13.88 | $27.76 |
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 12, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.