More inclined to think the statement means they won't be reinstating flights before this date, rather than they will be flying from this date
I agree, by saying this it gives clarity to all the people booked to fly before then, eg May half term, that their holiday will not be happening.
However, seeing as the OP has given nothing except a link and an outpouring of punctuation marks, I have no clue what point she is trying to make.