In 2026, showing your "plane ticket" (technically your mobile boarding pass) on your phone is the standard procedure for nearly all global airlines. Once you check in via the airline's app, you receive a digital pass containing a QR code or barcode. You can save this to your Apple Wallet or Google Wallet for easy access even without an internet connection. This digital pass is used at every stage: at the security checkpoint, when entering airport lounges, and at the gate during boarding. However, there are a few exceptions where a digital pass might not suffice. Some international destinations with rigid immigration laws still require a physical paper pass printed at the airport kiosk for document verification. Additionally, if your phone battery dies or the screen is severely cracked, the scanners may fail to read the code. It is always a "pro-traveler" move to ensure your phone is fully charged or to take a screenshot of the pass as a backup. Despite these rare hurdles, the world has moved toward a "paperless" travel ecosystem where your smartphone is your primary key to the aircraft.