 While standby for earlier flights began as a free service on many airlines, as of April 2010, most US airlines charge for unconfirmed standby, with a USD 50-75 fee being standard.Currently, United Airlines charges a USD 75 fee for standby travel to all passengers except passengers on full fare tickets, 1K passengers, Global Services passengers and premium cabin passengers.American Airlines restricts free standby to passengers who have elite status or fully refundable tickets, and charges a USD 75 fee for all other passengers who wish to secure a confirmed standby seat within 24 hours of their desired flight time.