Question : How long do most people visit Hamburg?
Answer : Of course you're not most people, but if you were, you'd stay roughly 16 days.
Question : What day in the next four weeks has the best fares?
Answer : Since low prices are preferred, look at Jun 28th. As of Jun 26th, it's showing the cheapest ticket sales at $1,340. That is 46% below the average price for this route, so you can spend that extra money on an adventure rather than the flight.
Question : What price range should you expect when booking from San Diego (SAN) to Hamburg (HAM)?
Answer : Prices for this trip tend to change a lot more than other flights from the United States. They can vary anywhere from $920 to $5,030. Prices tend to be lower the further out you book.
Question : Is price more important than specific travel days for you?
Answer : The cheapest day to fly in July is Saturday. Flexibility is paramount when booking travel plans in order to keep travel costs down.