SFGateAAA: Average price of gasoline in Washington $3.20SFGateBELLEVUE, Wash. (AP) — Gasoline prices have dropped below $3 a gallon at some stations in Washington. The AAA auto club reports the average price for a gallon of gasoline in the state is $3.20. That's down 11 cents in a week and 49 cents in a month.AAA: Average price of gasoline in Oregon $3.17seattlepi.comall 7 news articles »