I-5 motorists heading out for the 2026 Labor Day weekend (September 5–7) face elevated fuel costs, especially on the West Coast. National averages hover near $4.10 per gallon, but prices climb sharply through Washington, dip somewhat in Oregon, then surge again in California due to taxes, fuel formulations, and supply factors.
Expect heavy traffic Thursday–Monday. Fill up strategically and budget extra, as a full tank can cost $70–$90+ depending on vehicle and location. Prices below reflect recent American Automobile Association (AAA) and related averages for regular unleaded (as of early September 2026); they fluctuate daily.
Average Gas Prices Along I-5 (North to South)
| City | Approx. Avg. Price/Gallon |
|---|---|
| Seattle, WA | $5.50 |
| Tacoma, WA | $5.35 |
| Olympia, WA | $5.30 |
| Vancouver, WA | $5.25 |
| Portland, OR | $4.95 |
| Salem, OR | $4.90 |
| Eugene, OR | $4.83 |
| Medford, OR | $4.85 |
| Redding, CA | $5.55 |
| Sacramento, CA | $5.65 |
| Stockton, CA | $5.55 |
| Fresno, CA | $5.70 |
| Bakersfield, CA | $5.75 |
| Los Angeles, CA | $5.75 |
| San Diego, CA | $5.80 |
Washington and California lead the nation in high prices (state avgs. ~$5.37 and $5.70). Oregon offers relative relief around $4.89 statewide.
Tips for I-5 Holiday Drivers
Top off in Oregon stretches if possible. Avoid peak afternoon traffic near major metros. Monitor for any post-holiday dips as summer demand eases, though West Coast prices often stay sticky. Drive safely, check tires and fluids, and enjoy the corridor’s scenery from the Cascades to the Pacific. Safe travels this Labor Day weekend!
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