National gas prices reach highest since 2022; Washington average hits $5.35 per gallon Gas prices in Washington state remain among the highest in the nation, climbing to $5.35 per gallon as of Tuesday.Share this: Washington gas prices peak well above $5 per gallon before ceasefire reportsDateApril 7, 2026In relation toKing 5 NewsSeattle metro gas prices hit record-high $5.72 per gallonDateApril 28, 2026In relation toKing 5 NewsSeattle gas prices soar as Memorial Day weekend travel picks upDateMay 22, 2026In relation toKing 5 News