Your passport number may, however, be needed at the time of online check-in. Please note that if you are travelling to, from or via the United States, you need to give advance passenger information (passport details and the full address of your first night's accommodation in the US).

Yes, if you are traveling on an international flight in 2026, providing your passport number is a mandatory part of the online check-in process. Airlines are required by international security protocols and government border agencies to collect Advance Passenger Information (APIS) before the aircraft departs. This data includes your passport number, expiration date, country of issuance, and your full legal name as it appears on the document. Without this information, the airline's high-fidelity system cannot issue a digital boarding pass or clear you for travel. For domestic flights, you generally do not need a passport number unless you are using a passport as your primary form of government-issued ID. For 2026 travelers, it is a high-value necessity to have your physical passport nearby when checking in via a mobile app, as many apps now feature high-fidelity "NFC" or "Optical Scan" tools that can read your passport chip or data page to ensure 100% accuracy in the data transmission, preventing high-fidelity delays at the gate due to manual entry errors.