Costco Gas Prices in Union Gap, Washington
Latest reported regular prices per gallon from 1 of 1 Costco gas station; most recent report Oct 26, 2026 (UTC). Prices may vary at the pump.
Average Price
$4.76/gal
Lowest Price
$4.76/gal
Highest Price
$4.76/gal
1 Stations Found
Showing 1 cheapest — search or filter to see more
$4.76
2310 LONGFIBRE RD
Union Gap
All Costco Gas Stations in Union Gap, Washington
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