No, a United Club one-time pass cannot be used for access to a United Polaris® Lounge. This is a strict policy that remains in place in 2026 to preserve the exclusivity and comfort of the Polaris experience. United Polaris Lounges are reserved specifically for passengers traveling in United Polaris business class on long-haul international flights (typically crossing the Atlantic or Pacific) or for business class passengers on certain Star Alliance partner airlines. A standard United Club pass only grants you entry into the regular "United Club" locations, which offer a more basic level of amenities compared to the full-service dining, private daybeds, and shower suites found in the Polaris Lounges. If you have a one-time pass from a United Explorer credit card, you can use it at any of the dozens of United Club locations worldwide, but even a high-tier elite status like Premier 1K does not grant Polaris Lounge access unless you are physically flying in the Polaris cabin on that specific day of travel.