In 2026, one hour at the airport is almost never enough for a stress-free departure, especially at major international hubs. For domestic flights, most airlines recommend arriving at least two hours early, while for international travel, three hours is the standard. Even with TSA PreCheck or biometric "fast-track" systems, you must account for "unforeseen variables" like long baggage drop lines, peak-hour security surges, and the sheer physical distance to your gate—some terminals at airports like Denver or London Heathrow can take 20 minutes to navigate on foot. Most airlines also close the boarding gate 15 to 20 minutes before departure and may close baggage check 45 to 60 minutes prior. A supportive peer reality check: arriving just 60 minutes before your flight leaves you with zero margin for error; a single slow security line or a slightly busy parking garage could result in a missed flight and an expensive rebooking fee.