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.
The cheapest prices of the year are for travel in February, fare experts say, and those deals usually show up in November and early December. For peak-season travel, fares start fairly high and then come down. Airlines start more-actively managing pricing on flights about three-to-four months before departure.