How to book a flight for someone else?

If you are thinking of booking a flight ticket for another person, then the airline offers numerous mediums for the same. Passengers can book a flight for another person either by visiting the official website of the airline or with the help of a travel agency. Further, the information needed to book a flight for someone else includes journey details like journey date, number of passengers and trip type, passenger details such as date of birth of the individual, age, nationality, password number, and payment details.