In 2026, you generally do not need to print a physical boarding pass if you check in online, provided you have a smartphone that can display a mobile boarding pass (either via the airline's app or a digital wallet like Apple/Google Wallet). Most modern airports are equipped with scanners at security and the gate that can read QR codes directly from your screen. However, there are a few exceptions where a paper pass is highly recommended or required: 1) If you are traveling to a country with less-developed digital infrastructure; 2) If your phone battery is unreliable; or 3) If you are traveling as a large group where swiping through multiple passes might slow down the line. Additionally, some international "low-cost" carriers (like Ryanair in certain non-EU locations) may still charge a fee if you don't have a printed pass or a valid mobile one. A peer-to-peer "pro-tip" is to take a screenshot of your mobile boarding pass; this ensures you can access the QR code even if the airport Wi-Fi fails or the airline app crashes right as you reach the front of the security line.