If you miss the window for web check-in (which usually closes 1 to 2 hours before departure), you can still check in at the airport, but you may face several inconveniences. Most airlines allow you to use a self-service kiosk or visit a staffed check-in counter to obtain your boarding pass. However, by waiting until you get to the airport, you lose the opportunity to select your preferred seat, often leaving you with middle seats or separated from travel companions. Furthermore, some "ultra-low-cost" carriers (like Ryanair or Frontier) may charge a hefty fee (upwards of $25-$75) for issuing a boarding pass at the counter if you failed to do it online. Most importantly, if you miss the "airport check-in" cutoff (typically 45–60 minutes before departure), you will be marked as a "No Show," your seat may be given to a standby passenger, and your entire itinerary—including return flights—could be automatically canceled without a refund.