Many airlines offer online check-in for their travelers, including United Airlines, American Airlines, Southwest Airlines and Delta Air Lines, as of March 2015. These airlines all permit online check-in within 24 hours of flight departure.Continue Reading
Online check-in has become an industry standard, and some airlines offer check-in apps that enable travelers to check in with their smartphones. Travelers can also still check in at the airport in person, often at curbside or kiosks.
Online check-in requirements vary by airline and may require travelers to supply their names, record locators, confirmation numbers or airports of origin. Online check-in periods are similar or identical to in-person check-in periods, but travelers should consult with their airlines to confirm rules and requirements.Learn more about Geography