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"Para" is a form of "para", an abbreviation which is often translated as "párr.". "Flight number" is a noun which is often translated as "el número de vuelo". Learn more about the difference between "para" and "flight number" below.
para
An abbreviation is the shortened form of a word or group of words (e.g., "UFO" = "unidentified flying object"; "p." = "page").
1. (paragraph)
a. párr. 
The quote from the senator appears on pg. 47, para 4 of the report.La cita del senador aparece en la p. 47, párr. 4 del informe.
flight number( 
flayt
nuhm
-
buhr
)A noun is a word referring to a person, animal, place, thing, feeling, or idea (e.g., man, dog, house).
1. (general)
a. el número de vuelo (M)
(m) means that a noun is masculine. Spanish nouns have a gender, which is either feminine (like la mujer or la luna) or masculine (like el hombre or el sol).
Oh no, I forgot my ticket. - That's okay. Do you know the flight number?Ay, se me olvidó el boleto. - Está bien. ¿Sabes el número de vuelo?