BOISE, July 13 -
Oregon vs Idaho gas prices today
Today Oregon regular averages $3.79 per gallon; Idaho averages $3.14 per gallon. A $0.65 Oregon premium. For Ontario, OR and Boise, ID commuters, a 26-gallon pickup saves $16.90 per fill on the Idaho side. [EIA · 13 Jul 2026]
Why Oregon costs more
- Oregon Clean Fuels Program: ~5-15 cents/gal LCFS-equivalent.
- Oregon excise 40 c/gal vs Idaho 33 c/gal: 7-cent gap.
- Oregon rack feeds from Pacific Northwest refining; Idaho feeds from Salt Lake.
- Oregon's full-service mandate, though relaxed in 2023, still affects station economics.
The Ontario / Boise corridor
I-84 between Ontario, Oregon and Boise, Idaho crosses the state line at the Oregon-Idaho border. The savings on a single tank pay for a 50-mile detour at 20 mpg. For Ontario residents commuting toward Idaho, the math always favours filling on the Idaho side.
Related
OR · ID · border comparator