To verify your flight booking online in 2026, the most reliable method is to use the "Manage My Booking" or "My Trips" section on the official website of the airline you are flying with. You will need two pieces of information: your 6-character alphanumeric PNR (Passenger Name Record) or confirmation code, and the last name of the primary passenger. This code is typically found in the confirmation email you received at the time of purchase. If you booked through a third-party site like Expedia or Kayak, they provide their own itinerary number, but you should look for the specific "Airline Confirmation Code" to check directly with the carrier. Once logged in, you can see your flight status, seat assignments, and e-ticket number (a 13-digit code starting with the airline's specific prefix). If you cannot find your email, you can often retrieve the booking by logging into the airline's mobile app using your frequent flyer credentials, where any ticket linked to your profile will automatically appear.