You can readily identify an e-Passport, because it has a unique international symbol on the cover. Electronic System for Travel Authorization (ESTA) ESTA is an automated system that determines the eligibility of visitors to travel to the United States under the Visa Waiver Program (VWP). Authorization via ESTA does not determine whether a traveler is admissible to the United States.
Two to three weeks before the flight date, the price quotes start increasing. This is the time when business travelers start booking. While price drops are still possible, a chance of a price increase is much higher if you wait to book within this time period.
Fares still tend to be lower a few months before travel than they are 11 months before travel, but that difference is not as pronounced as it used to be. Still, on average, domestic flights open up for sale about $50 higher than their ultimate lowest price â and they typically stay that way for many months. 4.