Do Singapore Airlines web and app boarding-pass windows close at the same time?

What this answer depends on

• Singapore Airlines eligible digital/mobile boarding passes; distinct from check-in and airport deadlines
• If you have already completed check-in but need to retrieve the pass, the pass-generation window is relevant. If you have not completed check-in, use the check-in rule instead. The same interface can show both tasks, which makes it easy to borrow a later time from the wrong instruction.
• For U.S. flights, Singapore Airlines says boarding passes become available from 24 hours before departure. It also notes that regulatory requirements can make some travelers ineligible for a digital or mobile pass. A booking visible earlier is therefore not proof that a downloadable pass should already exist.
• Check the current airport acceptance information and your traveler’s eligibility. If the pass cannot be generated, establish whether the issue is timing, airport acceptance or required review. Do not use an old screenshot of a different flight as a workaround. This page supplies no permission to arrive at the gate later or to skip a counter instruction.
• Singapore Airlines boarding-pass generation is published as 48 to 1.5 hours on the website and 48 to 1 hour in the app.
• Singapore Airlines publishes online/mobile check-in from 48 to 1.5 hours before departure.
• Singapore Airlines U.S. boarding passes are available from 24 hours before departure, and some travelers cannot receive digital passes because of regulatory requirements.