United Airlines provides passengers with flexible check-in options to accommodate different travel styles and needs. The airline's online check-in service becomes available 24 hours before scheduled departure and can be accessed through United's official website or their comprehensive mobile app. During online check-in, travelers can verify their flight information, select or change seat assignments (depending on fare class and availability), purchase additional services like extra baggage allowance or premium seating, and obtain their boarding passes in digital or printable formats. United's mobile boarding passes are particularly convenient as they can be stored in Apple Wallet or Google Pay for easy access.
For passengers who prefer in-person check-in, United maintains full-service check-in counters at all airports they serve, typically opening two hours before domestic flights and three hours before international departures. Many United hubs and major airports also feature self-service kiosks where travelers can check in, print boarding passes, and tag their own luggage without waiting in line at the full-service counters. These kiosks are available in multiple languages and can process most check-in needs quickly and efficiently.
United Airlines has strict baggage check deadlines that passengers must observe to ensure their luggage makes it onto their flight. For domestic routes within the United States, checked baggage must be received at least 45 minutes before departure, while international flights require baggage to be checked at least 60 minutes prior to takeoff. United offers priority check-in lanes for Premier members, Star Alliance Gold status holders, and premium cabin passengers, which can significantly reduce wait times during busy travel periods. The airline also provides dedicated check-in areas for passengers requiring special assistance, including families traveling with young children and passengers with mobility challenges.