Fuel cost calculator · About 175 miles
Gas cost from Seattle to Portland
The drive from Seattle, WA to Portland, OR is about 175 miles, so a round trip costs about $57.80 in gas at this week's average of $4.95 a gallon. Change the car, fuel or distance below for your own figure.
What the trip costs by vehicle
| Vehicle | One way | Round trip |
|---|---|---|
| Compact car (33 mpg) | $26.27 | $52.55 |
| Midsize sedan (30 mpg) | $28.90 | $57.80 |
| Hybrid (50 mpg) | $17.34 | $34.68 |
| Minivan (22 mpg) | $39.41 | $78.82 |
| SUV (24 mpg) | $36.13 | $72.25 |
| Pickup truck (19 mpg) | $45.63 | $91.26 |
Regular gas at $4.954 a gallon, the average of this week's Washington and Oregon prices, from the EIA’s weekly survey. Fuel only: tolls and parking are not included.
Fuel economy figures are round examples for each kind of vehicle, not official ratings. Your own car's EPA rating is on fueleconomy.gov.
Distance: fastest route between city centres, rounded to the nearest 5 miles, calculated with OSRM on OpenStreetMap road data (© OpenStreetMap contributors), measured November 2026.
175 miles in Washington
$28.88
5.8 gallons at $4.95 a gallon
$4.65 more than the same trip at the national average.
- Per mile
- 16.5¢
- A full tank
- $74.25
- about 450 miles
- A year of driving
- $1,980
- $165 a month
Where to fill up
Regular is about $0.28 a gallon cheaper in Oregon than in Washington this week, $4.22 on a 15-gallon fill. Fill the tank on the Oregon side of the trip. See how Oregon’s gas tax compares.
Seattle to Portland by car
- How much does gas cost from Seattle to Portland?
- About $28.90 one way, or $57.80 for the round trip, in a car that gets 30 mpg. That assumes 175 miles and this week's average regular price of $4.95 a gallon. An SUV at 24 mpg spends about $36.13 one way; a hybrid at 50 mpg about $17.34.
- How far is Seattle from Portland by car?
- About 175 miles on the fastest route between the two city centres, measured on OpenStreetMap road data. Your own start and end points may make it a little longer or shorter; type your distance into the calculator for an exact figure.
- How many gallons of gas does the drive take?
- About 5.8 gallons one way at 30 mpg. That fits in a typical 15-gallon tank, so most cars can make it without stopping for fuel.
- Is gas cheaper in Washington or Oregon?
- This week regular is about $0.28 a gallon cheaper in Oregon, which is $4.22 on a 15-gallon fill. About 20¢ of that gap is state fuel tax. Filling up before you leave Oregon saves the most.