Motorists traveling around the Inland Northwest will be paying less for gasoline than they did even a month ago.

Prices are down by 20 to 50 cents per gallon since they peaked in late spring and over the Memorial Day holiday.

This week’s AAA survey shows the best deal on petrol is in southeast Idaho, where prices are at $3.39 per gallon in Pocatello and a dime higher in Idaho Falls.

The most expensive pump prices are in Ketchum/Hailey, where prices are at $3.87 per gallon.

In Washington state, AAA reports the average price for regular-grade fuel is $3.80 per gallon, down from $4 or more per gallon during the spring months.

Many pumps in Spokane were set at about $3.70 a gallon on Friday.

Prices in Boise were at $3.69, compared to $3.73 in Lewiston and $3.61 in Coeur d’Alene.

AAA Idaho Spokesman Dave Carlson says geographic isolation, wholesale suppliers and local retail competition influence pricing and disparities between cities.

Elsewhere, AAA reports the national average per-gallon price has dropped 44 cents since early May, compared to just a 13 cent decline in Idaho.