In 2026, you generally do not need to print a physical ticket if you have checked in online, as most major airlines and airports now accept mobile boarding passes with QR codes. These can be stored in your Apple Wallet or Google Wallet, or accessed via the airline’s app. However, there are three key reasons to carry a paper backup: first, some international airports (particularly in developing regions or smaller hubs) still require a printed pass for security or immigration processing. Second, if your phone battery dies or the app glitches, having paper avoids a stressful situation at the gate. Third, some "Ultra-Low-Cost Carriers" (like Ryanair or Spirit) may charge a reissue fee of $25 or more if you arrive without a pre-printed pass and can't access your digital one. For 2026 travel, the best practice is to take a screenshot of your digital pass as a "middle-ground" backup, but for long-haul international flights with multiple connections, a physical printout remains a reliable "peace of mind" insurance policy.