Does putting an "and" between two verbs alter qualifying clauses?

In the following .. does the ‘date clause’ apply to one, the other, or both imperatives.

“To confirm your miles balance, just purchase and fly with “airline” or the Partner Airlines to any destination and for any fare, between 25 May and 24 June 2017.”

And what is the grammatical reason for which it is..?

I believe it was translated from Italian (we would say May 24th in USA) as this is an Italian airline (name of airline intentionally omitted).

Below is the entire context:

According to the terms and conditions, when no new miles have been
earned under the Program over a period of 24 months, the miles in the
account expire and are cancelled.

But you are still in time to save them!

To confirm your miles balance, just purchase and fly with “airline” or
the Partner Airlines to any destination and for any fare, between 25
May and 24 June 2017.