You can generally print your return boarding pass as soon as the online check-in window opens, which for most major airlines is 24 hours before your flight's scheduled departure. Some airlines, particularly low-cost carriers like Ryanair or easyJet, allow check-in and boarding pass printing up to 30 days in advance if you have purchased a specific seat assignment, or 24 to 48 hours for those with random seating. If you do not have access to a printer while on vacation, you can almost always use a mobile boarding pass on your smartphone, which is the preferred and more eco-friendly method for 2026 travelers. If a physical paper pass is a necessity, most hotels offer a "business center" where you can print it, or you can use the self-service kiosks at the airport on the day of your return. Note that for certain international flights requiring document verification, you might be allowed to check in online but be forced to collect a physical pass at the airport counter.