Another accepted translation is "..for the tomorrow's flight". I don't believe that this is grammatically correct. The "the" should not be used because "flight" is already defined by "tomorrow's". It should not use a definite article.
Romanian wording is wrong. "Imbarcarile" is plural and it is NEVER used in this context. Talking about airport boarding it is always singular "Imbarcarea". This will also make the English translation sound right