Go to the plane company's website or go to a ticket confirmation website such as "View Trip" or "Check My Trip" (see Resources). For the plane company's website, go to the check-in page to check on the trip.
Look on the ticket for the reservation number. The number is sometimes also called the confirmation number on the ticket. The reservation number includes both numbers and letters.
Type in the reservation number on the website. The website will usually require a minimum of a last name or both a first and last name after the reservation number. Type in the name as well.
Press the search button. The search button might say "go," "view itinerary," or "sign in" depending on the website. The flight information should come up on the page and should note any changes to the flight.