I think the OP is instead refering to the standard disclaimer to arrive 1-2 hour...

		adestefan on April 22, 2012 \| parent \| context \| favorite \| on: Pentagon releases results of 13,000-mph test fligh... I think the OP is instead refering to the standard disclaimer to arrive 1-2 hours before your flight to get through baggage check, security, and sitting at the gate.