Thread: на + accusative for time period or transport

Some examples of the construction being used . . .

билет на одну поездку (ticket for one trip)
билет на две поездки (ticket for two trips)
билет на пять поездок (ticket for five trips)

Why in the example for five trips is поездка in the genitive? First two are accusative, then it switches to genitive. Is this correct? Any help is appreciated.

It is true that the accusative case underlies each of these examples, but, in fact, only the first one uses this case without modifying it. Numbers два, три and четыре will override words in the nominative and accusative cases, making the new case genitive singular. Further, numbers пять through девять will cause a change from nominative/accusative to genitive plural.

Thus:
На одну поездку: Accusative singular.
На две поездки: Looks plural, but is technically genitive singular.
На пять поездок: Genitive plural.

Hi! I can send you a pdf-file. Where to?

It has nothing to do with 'time period' or 'transport'. This is about the collocation of nouns with numbers, which I would recommend you to divide into 3 groups: (1) 'one' plus a noun; (2) 'half, 2, 3, 4' plus a noun; and (3) '5, 6...' plus a noun.

Originally Posted by nsdfrv

Hi! I can send you a pdf-file. Where to?

You are welcome to place it here, but I do not know how it works.

Thank you

Originally Posted by lenssideways8

Some examples of the construction being used . . .

билет на одну поездку (ticket for one trip)
билет на две поездки (ticket for two trips)
билет на пять поездок (ticket for five trips)

Why in the example for five trips is поездка in the genitive? First two are accusative, then it switches to genitive. Is this correct? Any help is appreciated.

Let me continue 
So, the trick is as follows:
(1) In collocations «один/одна/одно + a noun» the two parts (a numeral and a noun) fully agree. It means that when you decline, you decline the whole collocation. I would even say that a noun prevails in this collocation – we manipulate a NOUN (not a numeral), while the numeral obeys the noun (like an indefinite article). For example, you can omit the numeral from the collocations «одна поездка, на одну поездку, одной поездкой, без одной поездки, об одной поездке» without any harm to the meaning: «поездка, на поездку, поездкой, без поездки, о поездке».
Further we’ll talk ONLY about the numerals in the Nominative and Accusative case-forms and their collocation with inanimate nouns:
(2) In collocations «пол-, 2, 3 and 4 + a noun» we use a noun in the form which, surprisingly, coincides with the GENITIVE case-form SINGULAR (половина/две/три/четыре + поездки/цены/билета). The noun form remains the same, e.g. «половина/две/три/четыре поездкИ» (Nominative numeral), «на половину/две/три/четыре поездкИ» (Accusative numeral).
(3) In collocations «5, 6… + a noun» we use a noun in the GENITIVE case-fom PLURAL. It refers both to the Nominative and Accusative, e.g. «пять/шесть/семь… поездОК» (Nominative numeral), «на пять/шесть/семь… поездОК» (Accusative numeral).

I wanted to enclose a pdf-file, but, as far as I understand, this format doesn't go