Question : What is the cheapest day to fly in the next four weeks?
Answer : Since low prices are preferred, look at Mar 6th. As of Feb 20th, it's showing the cheapest ticket sales at $719. That is 80% below the average price for this route, so you can spend that extra money on an adventure rather than the flight.
Question : Is the price you found a good deal?
Answer : Ranging anywhere from $719 to $6,510, prices for CVG to LED do change much more than the majority of routes from the United States. Prices tend to be lower the further out you book.
Question : How long do most people visit Saint Petersburg?
Answer : Of course you're not most people, but if you were, you'd stay roughly one week.
Question : Is price more important than specific travel days for you?
Answer : The lowest-cost day to fly in March is Monday. Being flexible with your travel days garners even more savings during booking.