Auto insurance is obviously different depending on the type of coverage you buy, but since the national average expenditure for car insurance is $795 a year and PA's average is $820, it can easily be inferred that Pennsylvanians are likely to pay a bit more on average for just about any type of coverage.
To answer that question, airfare shopping engine CheapAir.com monitored fares for more than 4 million flights in 2013 over a booking period ranging from 320 days in advance to one day in advance. Its researchers found that fares for domestic flights were lowest 54 days in advance.
Number crunchers from CheapAir.com, an airfare booking site, monitored 4,191,533 trips last year to find a solution. They looked at fare fluctuations from 320 days to one day in advance of departure to determine how far ahead of time travelers should book plane tickets. All in all, the folks at CheapAir.com analyzed the booking data from roughly 1.3 billion airfares.