Travelers have found that booking a Saturday departure is the best way to save up to 109% on the cost of booking your flights compared to booking on days of the week where this route is of high demand.
Due to multiple factors, expect to potentially pay more when booking in October. For low rates, February can be a great choice for travel to Helsinki. Flights to Helsinki from San Jose in February are about $1,076 on average during February, but can be found for as low as $557.
One of the essential ways to save on airfare from San Jose to Helsinki is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 36% on airfare.