What is the difference between United Business and First Class? United First is available only on flights within the U.S. and Canada. United Business class is available on flights between the U.S. and Latin America or the Caribbean, as well as some U.S. transcontinental flights.

On United Airlines, the distinction between business and first class depends on whether you are flying domestically or internationally. United First is the name for the premium cabin on domestic flights within the U.S. and to Canada or the Caribbean, featuring larger leather seats with more recline, priority boarding, and complimentary hot meals on longer routes. On international long-haul flights, the premium cabin is called United Polaris Business Class, which is a significantly higher tier of service featuring 180-degree flat-bed "suites" with direct aisle access, Saks Fifth Avenue bedding, and access to the exclusive Polaris Lounges. In early 2026, United is also debuting the Polaris Studio on select Boeing 787-9 aircraft, which offers 25% more space than standard Polaris seats. There is no "International First Class" on United; Polaris is their top-tier global offering. Essentially, "First" is a regional premium product with better seats, while "Business" (Polaris) is a luxury global product designed for sleep and productivity on transoceanic journeys, complete with multi-course dining and high-end amenity kits.