Members fly high with Alliant Credit Union. With about 10 locations near major US airports, Alliant is one of the largest credit unions in the country with some $7 billion in assets and more than 260,000 members. The credit union offers a fleet of products and services, including checking and savings accounts, credit cards, investments, and insurance. Alliant also offers mortgages, as well as home equity, auto, and student loans. Membership is open to all Chicagoland residents and current and retired employees (and families) of United Airlines, Aflac, Google, Kaiser Permanente, and over a hundred other qualifying companies and organizations. Alliant was founded by a group of United Airlines employees in 1935.