Hours Of Operations Costco Wholesale Corporation Washington Union Gap 98903 Costco Wholesale Corporation Hours of Operation and Location in Union Gap, WA 98903 4.2 - 104 votes 2310 Longfibre Ave, Union Gap, WA 98903 (509) 454-5240 Get Directions Costco Wholesale Corporation Hours Category: Accessories Apparel Beauty & Health Electronics Hours Hours may vary due to season or holiday reasons. For specific hours, please contact store directly. Map Explore Union GapView More Apparel CostcoTJ MaxxRoss Dress for LessBurlington Coat FactoryCabela's Sports CostcoCabela'sVansRoxyFinish Line Jewelry CostcoBurlington Coat FactoryZalesKohl's OutletKay Jewelers Recommend For You Lowe's Home Improvement New York Magic Nails Cottage Market Cross Country Deli & Grocery Deli Grocery Development LLC Discount City Discovery Llc