Many airlines ask passengers to check in 24 hours before their flight to help speed up the boarding process and organize seating. But what happens if you don’t check in during that 24-hour window? First, you might lose the chance to pick your preferred seat online. Most airlines let you choose or change seats only when you check in early. If you skip this, you could end up with a less comfortable spot, like a middle seat or near the back. Another important effect is that your airline ticket might be canceled or your seat released to other travelers. Some airlines have strict rules that if you don’t check in on time, your booking can be canceled and the seat sold again. This happens often with budget airlines or busy flights where seats are limited. Also, if you don’t check in online, you will need to check in at the airport counter. This means you have to arrive at the airport earlier to stand in longer lines, which can be stressful, especially during busy travel periods. Airport check-in counters usually close 30 to 60 minutes before departure, so arriving late might cause you to miss the chance to check in entirely, and you could lose your flight. Missing the 24-hour online check-in also means you might miss out on faster airport services. Many airlines offer priority boarding or quick security lanes only to passengers who checked in online early. Without checking in on time, you could spend more time waiting in queues. Another key point is that online check-in allows you to upload and confirm your travel documents, like passports and visas. If you delay this process, it might cause problems at the airport, such as additional document checks or even denied boarding. If you have special needs, like traveling with pets, children, or requiring assistance, failing to check in early can complicate these arrangements. These situations often need extra processing time at the airport. Even if you miss the 24-hour online check-in, most airlines still allow you to check in at the airport. However, it’s crucial to get there early and allow plenty of time, as airport counters can get crowded, and delays are common. To avoid these issues, set reminders or check your airline’s app and email for check-in alerts as soon as the 24-hour window opens. In conclusion, not checking in 24 hours before your flight can mean losing your seat choice, risking cancellation, facing long lines, missing faster boarding options, and adding stress to your travel. Always try to check in online early to save time and enjoy a smoother airport experience. Checking in promptly helps ensure your trip starts without unnecessary delays and worries.