Informed Air Traveler Act of 2007 - Directs the Secretary of Transportation to promulgate rules to require a passenger air carrier to: (1) publish customer service data for all passenger flights on, or in conjunction with the issuance of, an airline ticket and on the air carrier's website; and (2) disclose on-time performance and cancellation rate for a chronically delayed or chronically canceled flight whenever a passenger makes a reservation or purchases a ticket for such flight in person, by telephone, or through the air carrier's website.