这句话的意思: “我希望今天中午前抵达机场”。说话的时候，应该在当天早晨，至少是中午12点以前。

根据《朗文英语语法》一书的解释，"很多表示将来的动词通常不接不定式完成式，但有些表示意图、希望的词（如hope）可以接不定式完成式,相当于将来完成时"。该书例句：I hope(d)  to have finished by 12.

该书原文如下：

6.23 Verbs followed by a to-infinitive or a that-clause

Many verbs can be followed directly by a to-infinitive or a that-clause: agree, arrange, beg (not) care, choose claim contrive, decide demand, determine, expect, hope, intend, learn, plan, prefer pretend, promise, resolve swear, threaten and wish; Most of these verbs point to the future, so they are not normally followed by the perfect form of the infinitive. However, verbs referring to intentions, hopes, etc. can be followed by a perfect infinitive, parallel to the use of the future perfect:

I hope(d) (etc.) to have finished by 12.