Not boarding time: the time to get to the airport. Enter a US flight number for one arrive-by time built for that airport, terminal and hour.
Every airport runs differently, and so does every hour of the day. BoardFlight starts from your specific flight and works backward through bag drop, security, and the walk to your gate. What comes out is the time you should walk in the door.
A slow morning won’t make you miss your flight, and you still aren’t sitting at the gate for two spare hours.
There isn’t one right answer, and “two hours early” is a guess that ignores what actually decides it: your airport, your terminal, whether you’re checking a bag, your security lane, and the hour you fly. The same checkpoint can be quiet at one hour and backed up the next.
BoardFlight works backward from your scheduled departure through each of those steps and gives you one time to walk in the door. A 10:40 PM domestic departure from LAX with no checked bag in the standard lane, for example, means arriving by 8:56 PM, 104 minutes ahead. Change the terminal, the bag or the lane and the answer changes with it.
It’s a planning estimate, not a guarantee. Your airline’s own check-in, bag-drop and boarding deadlines always come first.
Boarding time is set by your airline and shown on your boarding pass. It’s when the gate starts letting passengers on, and the door closes shortly before departure. Arrive-by time comes earlier: it’s when you need to walk into the airport so you can check in, drop a bag, clear security and reach the gate before boarding ends. BoardFlight gives you the arrive-by time.
How boarding times work at major US airlines →
BoardFlight profiles 61 US airports, each built from its own terminal layout and security profile, with representative arrive-by times on every airport page.