The charts “How far in advance should you book a Seattle vacation package?”, “Cheapest months to visit Seattle”, “How long are most Seattle vacation packages?” and “Most Popular Travel Months” are built from the vacation packages Priceline customers actually booked from the US to Seattle, pooled across every US departure city. Shares of bookings count every package booked on the routes.
So that prices compare like with like, each price chart uses the trip length booked most often on this route and the hotel star class booked most often at this destination; discounts compare the package price with the same hotel and flight booked separately.
Where the route has too few bookings to fill every point in a chart, we borrow the shape of the curve from a group of routes with similar booking patterns and fit it to the packages booked on this route.
These charts show averages from past bookings and are not adjusted to today’s prices. The package prices in Good to Know and in the hotel list come from a recent search, per person.