How far is Hillsboro, OR from Union, OR?
The driving distance from Hillsboro, OR to Union, OR is about 293.7 miles (472.7 km), with a travel time of about 05h 41m by car.
- The straight-line flight distance is about 249.7 miles (401.8 km).
- For a round trip, plan for roughly 11h 23m 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 05h 41m.
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.
Light Rain Likely
Rain
Driving Route Map
The map below follows the saved road route between Hillsboro and Union.
Turn-by-Turn Driving Directions
Step-by-step road directions between Hillsboro and Union.
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1
Start on North 1st Avenue
118 m · 17 sec · North 1st Avenue
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2
Turn right onto Northeast Lincoln Street
1.3 km · 3 min · Northeast Lincoln Street
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3
Turn left onto Northeast Cornell Road
2 mi · 4 min · Northeast Cornell Road
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4
Turn left onto Northeast Brookwood Parkway
1.7 mi · 3 min · Northeast Brookwood Parkway
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5
Turn right onto Northeast Evergreen Parkway
1.5 km · 2 min · Northeast Evergreen Parkway
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6
Turn left onto Northeast Imbrie Drive
2190 ft · 48 sec · Northeast Imbrie Drive
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7
Turn left onto Northeast Cornelius Pass Road
997 ft · 24 sec · Northeast Cornelius Pass Road
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8
Take the ramp slight right toward US 26 East: Portland
1721 ft · 44 sec
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9
Merge slight left onto Northwest Sunset Highway
6.7 mi · 9 min · Northwest Sunset Highway
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10
Continue on Sunset Highway
4.3 mi · 6 min · Sunset Highway
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11
Keep slight right to continue on I 405 South, US 26 East: Salem
1189 ft · 20 sec
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12
Merge slight left onto Stadium Freeway
1.1 km · 59 sec · Stadium Freeway
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13
Take the exit slight right toward I 5 North, I 84 East: The Dalles, Seattle
2616 ft · 45 sec · Stadium Freeway
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14
Merge slight left onto Marquam Bridge
2330 ft · 40 sec · Marquam Bridge
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15
Take the exit slight right toward I 84 East, US 30 East: The Dalles, Portland Airport
1011 ft · 17 sec
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16
Keep slight left to continue on I 84 East, US 30 East: Portland Airport, The Dalles
1.5 km · 1 min
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17
Continue on Banfield Freeway
6.6 mi · 9 min · Banfield Freeway
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18
Continue on Columbia River Highway
158.1 mi · 2 hr 56 min · Columbia River Highway
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19
Continue on Old Oregon Trail Highway
97.3 mi · 1 hr 45 min · Old Oregon Trail Highway
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20
Take the exit slight right toward OR 203: La Grande, Union
1358 ft · 36 sec
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21
Continue on La Grande-Baker Highway
10.5 mi · 16 min · La Grande-Baker Highway
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22
Continue on North Main Street
3079 ft · 57 sec · North Main Street
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23
Turn left onto East Beakman Street
21 m · 1 sec · East Beakman Street
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24
Arrive at your destination
0 m · 1 sec · East Beakman Street
Car Route Details
A richer read on the saved driving route between Hillsboro and Union.
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.
Light Rain Likely leaving Hillsboro and Rain near Union.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Hillsboro to Union?
The road trip is about 293.7 miles (472.7 km) and usually takes 05h 41m 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?
Arlington is a useful midpoint, sitting about 146.6 miles from Hillsboro and 147.2 miles from Union.
How much longer is the road route than the straight-line distance?
The direct path is about 249.7 miles (401.8 km), while the road route adds roughly 44 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 5:36 AM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $51.34 one way or $102.68 round trip. Estimated CO2 is about 92.2 kg one way.
What should you check before leaving?
Before you leave, expect Light Rain Likely around Hillsboro and Rain near Union.
Stop Ideas Near Arlington
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 Arlington.
Wishram
The Dalles, Oregon
Bingen – White Salmon
Hood River, Oregon
Flight Path Map
This map shows the direct air route between Hillsboro and Union. Straight-line distance: 249.67 mi (401.81 km).
#1 Hillsboro
The most populous city in Washington County, Oregon.
| Population | 110,985 |
| Coordinates | 45.5228900, -122.9898300 |
| Altitude | 59 |
| Country | United States |
#2 Union
Township of Union County, New Jersey
| Population | 2,207 |
| Coordinates | 45.2084700, -117.8652100 |
| Altitude | 850 |
| Country | United States |
End: Union (-117.86521, 45.20847)
Estimated Travel Time
Distance: 473 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 09h 47m |
| 40 mph (64.37 km/h) | 07h 20m |
| 50 mph (80.47 km/h) | 05h 52m |
| 60 mph (96.56 km/h) | 04h 53m |
| 70 mph (112.65 km/h) | 04h 11m |
| 80 mph (129 km/h) | 03h 39m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.95 | $51.34 | $102.68 |
| Mid-grade | $5.34 | $55.36 | $110.71 |
| Premium | $5.57 | $57.72 | $115.44 |
| Diesel | $6.37 | $66.02 | $132.03 |
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.