Check-in times You can check in online or from the app starting 24 hours before and up to 45 minutes before your flight (90 for international). To check bags or check in at the airport, you must be there a certain amount of time before scheduled departure: Within the U.S. – 45 minutes.

In 2026, most airports and airlines allow you to enter the terminal and check your bags up to 4 to 6 hours before departure, but rarely earlier due to security and space constraints. For international flights, the standard "window" is 3 to 4 hours, while domestic flights are usually 2 hours. However, if you have already completed "Web Check-In" (which usually opens 24 to 48 hours before the flight), you can arrive as early as the terminal's security policy allows. Many major hubs like London Heathrow, Dubai, or Delhi permit ticketed passengers to enter the secure area up to 6 hours before an international flight. If you arrive extremely early—such as 12 hours before—you may be denied entry to the "airside" area until your departure window opens. Some premium airlines and specific airports (like Singapore Changi) offer "Early Check-In" lounges where you can drop bags many hours in advance. For the general traveler, arriving 3 to 4 hours early is the "sweet spot" to ensure you have time for security and immigration without being stuck in the "landside" public area waiting for the check-in counters to open.